SFH620A Optocoupler: Datasheet, Pinout, Circuit
Optocoupler AC-IN 1-CH Transistor DC-OUT 4-Pin PDIP
SFH620A is an Optocoupler that has two parts i.e., two GaAs Infrared emitting diodes and a phototransistor, which functions by sensing the infrared light. This article will cover its pinout, datasheet, application, circuit and more details about SFH620A.
SFH620A Pinout

SFH620A Pinout
Pin Number | Pin Name | Function |
1 | Anode/Cathode | Light Emitting Diode Anode/Cathode pin |
2 | Cathode/Anode | Light Emitting Diode Anode/Cathode pin |
3 | Emitter | Phototransistor Emitter pin |
4 | Collector | Phototransistor Collector pin |
SFH620A Cad Model
Symbol

SFH620A Symbol
Footprint

SFH620A Footprint
3D Model

SFH620A 3D Model
SFH620A Description
The SFH620A (DIP) features a high current transfer ratio, low coupling capacitance and high isolation voltage. These couplers have a GaAs infrared diode emitter, which is optically coupled to a silicon planar phototransistor detector and is incorporated in a plastic DIP-4 or SMD package.
The coupling devices are designed for signal transmission between two electrically separated circuits. The couplers are end-stackable with 2.54 mm lead spacing. Creepage and clearance distances of > 8 mm are achieved with option 6. This version complies with IEC 6 0950 (DIN VDE 0805 ) for reinforced insulation to an operation the voltage of 4 00 VRMS or DC.
SFH620A Feature
• Good CTR linearity depending on forward current
• Isolation test voltage, 5300 VRMS
• High collector-emitter voltage, VCEO = 70 V
• Low saturation voltage
• Fast switching times
• Low CTR degradation
• Temperature stable
• Low coupling capacitance
• End-stackable, 0.100" (2.54 mm) spacing
• High common-mode interference immunity
SFH620A Application
AC/DC Switching Circuits
Signal Isolator Circuits
Analog Current Detection
Power Control
SFH620A Alternatives
SFH620A Schematic
The schematic given below is a switching circuit using SFH620A Optocoupler.

SFH620A Schematic
The input is applied to the LEDs, which are the initial portion of the optocoupler. To limit the current through the LEDs, a resistor is connected in series with them. The phototransistor gain is controlled by the intensity of the infrared light emitted by them, which is controlled by the current. The higher the phototransistor gain, the lower the limiting resistance value. The phototransistor component receives the load. This is where the swapping begins.
If the phototransistor detects enough infrared energy to turn it, electricity will flow from the emitter to the collector. However, because the phototransistor is linked to a pull-up resistor, the output state will be low, i.e. 5 volts will be stepped down to 0 and an LED attached as a load will not glow. If the phototransistor detects no radiation, it conducts no current and the output state is high. Let's imagine there's an LED attached to the output state, which will light up.
SFH620A Package
SFH620A Manufacturer
Vishay’s product portfolio is an unmatched collection of discrete semiconductors (diodes, MOSFETs, and optoelectronics ) and passive components (resistors, inductors, and capacitors ). These components are used in virtually all types of electronic devices and equipment in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Vishay is proud to be a major partner with Digi-Key.
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Specifications
- TypeParameter
- Factory Lead Time15 Weeks
- Contact Plating
Contact plating (finish) provides corrosion protection for base metals and optimizes the mechanical and electrical properties of the contact interfaces.
Tin - Mount
In electronic components, the term "Mount" typically refers to the method or process of physically attaching or fixing a component onto a circuit board or other electronic device. This can involve soldering, adhesive bonding, or other techniques to secure the component in place. The mounting process is crucial for ensuring proper electrical connections and mechanical stability within the electronic system. Different components may have specific mounting requirements based on their size, shape, and function, and manufacturers provide guidelines for proper mounting procedures to ensure optimal performance and reliability of the electronic device.
Through Hole - Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Through Hole - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
4-DIP (0.300, 7.62mm) - Number of Pins4
- Supplier Device Package
The parameter "Supplier Device Package" in electronic components refers to the physical packaging or housing of the component as provided by the supplier. It specifies the form factor, dimensions, and layout of the component, which are crucial for compatibility and integration into electronic circuits and systems. The supplier device package information typically includes details such as the package type (e.g., DIP, SOP, QFN), number of pins, pitch, and overall size, allowing engineers and designers to select the appropriate component for their specific application requirements. Understanding the supplier device package is essential for proper component selection, placement, and soldering during the manufacturing process to ensure optimal performance and reliability of the electronic system.
4-DIP - Collector-Emitter Breakdown Voltage70V
- Collector-Emitter Saturation Voltage400mV
- Current Transfer Ratio-Min100% @ 10mA
- Number of Elements1
- Turn Off Delay Time
It is the time from when Vgs drops below 90% of the gate drive voltage to when the drain current drops below 90% of the load current. It is the delay before current starts to transition in the load, and depends on Rg. Ciss.
2.3 μs - Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-55°C~100°C - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tube - Published2014
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Max Operating Temperature
The Maximum Operating Temperature is the maximum body temperature at which the thermistor is designed to operate for extended periods of time with acceptable stability of its electrical characteristics.
100°C - Min Operating Temperature
The "Min Operating Temperature" parameter in electronic components refers to the lowest temperature at which the component is designed to operate effectively and reliably. This parameter is crucial for ensuring the proper functioning and longevity of the component, as operating below this temperature may lead to performance issues or even damage. Manufacturers specify the minimum operating temperature to provide guidance to users on the environmental conditions in which the component can safely operate. It is important to adhere to this parameter to prevent malfunctions and ensure the overall reliability of the electronic system.
-55°C - Voltage - Rated DC
Voltage - Rated DC is a parameter that specifies the maximum direct current (DC) voltage that an electronic component can safely handle without being damaged. This rating is crucial for ensuring the proper functioning and longevity of the component in a circuit. Exceeding the rated DC voltage can lead to overheating, breakdown, or even permanent damage to the component. It is important to carefully consider this parameter when designing or selecting components for a circuit to prevent any potential issues related to voltage overload.
1.25V - Max Power Dissipation
The maximum power that the MOSFET can dissipate continuously under the specified thermal conditions.
150mW - Approval Agency
The parameter "Approval Agency" in electronic components refers to the organization responsible for testing and certifying that a component meets specific safety, quality, and performance standards. These agencies evaluate products to ensure compliance with industry regulations and standards, providing assurance to manufacturers and consumers. Approval from recognized agencies can enhance a component's marketability and acceptance in various applications, particularly in sectors like automotive, aerospace, and healthcare. Common approval agencies include Underwriters Laboratories (UL), International Electrotechnical Commission (IEC), and the American National Standards Institute (ANSI).
UL - Voltage - Isolation
Voltage - Isolation is a parameter in electronic components that refers to the maximum voltage that can be safely applied between two isolated points without causing electrical breakdown or leakage. It is a crucial specification for components such as transformers, optocouplers, and capacitors that require isolation to prevent electrical interference or safety hazards. The voltage isolation rating ensures that the component can withstand the specified voltage without compromising its performance or safety. It is typically measured in volts and is an important consideration when designing circuits that require isolation between different parts of the system.
5300Vrms - Output Voltage
Output voltage is a crucial parameter in electronic components that refers to the voltage level produced by the component as a result of its operation. It represents the electrical potential difference between the output terminal of the component and a reference point, typically ground. The output voltage is a key factor in determining the performance and functionality of the component, as it dictates the level of voltage that will be delivered to the connected circuit or load. It is often specified in datasheets and technical specifications to ensure compatibility and proper functioning within a given system.
70V - Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
Transistor - Number of Channels1
- Voltage
Voltage is a measure of the electric potential difference between two points in an electrical circuit. It is typically represented by the symbol "V" and is measured in volts. Voltage is a crucial parameter in electronic components as it determines the flow of electric current through a circuit. It is responsible for driving the movement of electrons from one point to another, providing the energy needed for electronic devices to function properly. In summary, voltage is a fundamental concept in electronics that plays a key role in the operation and performance of electronic components.
6V - Power Dissipation
the process by which an electronic or electrical device produces heat (energy loss or waste) as an undesirable derivative of its primary action.
250mW - Voltage - Forward (Vf) (Typ)
The parameter "Voltage - Forward (Vf) (Typ)" in electronic components refers to the typical forward voltage drop across the component when it is conducting current in the forward direction. It is a crucial characteristic of components like diodes and LEDs, indicating the minimum voltage required for the component to start conducting current. The forward voltage drop is typically specified as a typical value because it can vary slightly based on factors such as temperature and manufacturing tolerances. Designers use this parameter to ensure that the component operates within its specified voltage range and to calculate power dissipation in the component.
1.25V - Input Type
Input type in electronic components refers to the classification of the signal or data that a component can accept for processing or conversion. It indicates whether the input is analog, digital, or a specific format such as TTL or CMOS. Understanding input type is crucial for ensuring compatibility between different electronic devices and circuits, as it determines how signals are interpreted and interacted with.
AC, DC - Turn On Delay Time
Turn-on delay, td(on), is the time taken to charge the input capacitance of the device before drain current conduction can start.
3 μs - Forward Current
Current which flows upon application of forward voltage.
60mA - Max Output Voltage
The maximum output voltage refers to the dynamic area beyond which the output is saturated in the positive or negative direction, and is limited according to the load resistance value.
70V - Output Current per Channel
Output Current per Channel is a specification commonly found in electronic components such as amplifiers, audio interfaces, and power supplies. It refers to the maximum amount of electrical current that can be delivered by each individual output channel of the component. This parameter is important because it determines the capacity of the component to drive connected devices or loads. A higher output current per channel means the component can deliver more power to connected devices, while a lower output current may limit the performance or functionality of the component in certain applications. It is crucial to consider the output current per channel when selecting electronic components to ensure they can meet the power requirements of the intended system or setup.
50mA - Rise Time
In electronics, when describing a voltage or current step function, rise time is the time taken by a signal to change from a specified low value to a specified high value.
2μs - Forward Voltage
the amount of voltage needed to get current to flow across a diode.
1.25V - Fall Time (Typ)
Fall Time (Typ) is a parameter used to describe the time it takes for a signal to transition from a high level to a low level in an electronic component, such as a transistor or an integrated circuit. It is typically measured in nanoseconds or microseconds and is an important characteristic that affects the performance of the component in digital circuits. A shorter fall time indicates faster switching speeds and can result in improved overall circuit performance, such as reduced power consumption and increased data transmission rates. Designers often consider the fall time specification when selecting components for their circuits to ensure proper functionality and efficiency.
2 μs - Collector Emitter Voltage (VCEO)
Collector-Emitter Voltage (VCEO) is a key parameter in electronic components, particularly in transistors. It refers to the maximum voltage that can be applied between the collector and emitter terminals of a transistor while the base terminal is open or not conducting. Exceeding this voltage limit can lead to breakdown and potential damage to the transistor. VCEO is crucial for ensuring the safe and reliable operation of the transistor within its specified limits. Designers must carefully consider VCEO when selecting transistors for a circuit to prevent overvoltage conditions that could compromise the performance and longevity of the component.
70V - Max Collector Current
Max Collector Current is a parameter used to specify the maximum amount of current that can safely flow through the collector terminal of a transistor or other electronic component without causing damage. It is typically expressed in units of amperes (A) and is an important consideration when designing circuits to ensure that the component operates within its safe operating limits. Exceeding the specified max collector current can lead to overheating, degradation of performance, or even permanent damage to the component. Designers must carefully consider this parameter when selecting components and designing circuits to ensure reliable and safe operation.
100mA - Rise / Fall Time (Typ)
The parameter "Rise / Fall Time (Typ)" in electronic components refers to the time it takes for a signal to transition from a specified low level to a specified high level (rise time) or from a high level to a low level (fall time). It is typically measured in nanoseconds or picoseconds and is an important characteristic in determining the speed and performance of a component, such as a transistor or integrated circuit. A shorter rise/fall time indicates faster signal switching and can impact the overall speed and efficiency of a circuit. Designers often consider this parameter when selecting components for high-speed applications to ensure proper signal integrity and timing.
2μs 2μs - Reverse Breakdown Voltage
Reverse Breakdown Voltage is the maximum reverse voltage a semiconductor device can withstand before it starts to conduct heavily in the reverse direction. It is a critical parameter in diodes and other components, indicating the threshold at which the material's insulating properties fail. Beyond this voltage, the device may enter a breakdown region, leading to potential damage if not properly managed. This parameter is essential for ensuring safe operation and reliability in electronic circuits.
6V - Max Input Current
Max Input Current is a parameter that specifies the maximum amount of electrical current that can safely flow into an electronic component without causing damage. It is an important consideration when designing or using electronic circuits to ensure that the component operates within its specified limits. Exceeding the maximum input current can lead to overheating, component failure, or even pose safety risks. Manufacturers provide this parameter in datasheets to help engineers and users understand the limitations of the component and ensure proper operation within the specified parameters.
60mA - Current - DC Forward (If) (Max)
The parameter "Current - DC Forward (If) (Max)" in electronic components refers to the maximum forward current that can safely pass through the component without causing damage. This parameter is typically specified in datasheets for diodes and LEDs, indicating the maximum current that can flow through the component in the forward direction. Exceeding this maximum current rating can lead to overheating and potentially permanent damage to the component. It is important to ensure that the current flowing through the component does not exceed this specified maximum to maintain proper functionality and reliability.
60mA - Input Current
Input current is a parameter that refers to the amount of electrical current flowing into a specific electronic component or device. It is typically measured in amperes (A) and represents the current required for the component to operate properly. Understanding the input current is important for designing circuits and power supplies, as it helps determine the capacity and compatibility of the components being used. Monitoring the input current also helps ensure that the component is not being overloaded or underpowered, which can affect its performance and longevity.
60mA - Current Transfer Ratio (Max)
The "Current Transfer Ratio (Max)" is a parameter used to describe the efficiency of a specific type of electronic component known as an optocoupler or optoisolator. This parameter indicates the maximum ratio of output current to input current that can be achieved under ideal conditions. In simpler terms, it quantifies how effectively the optocoupler can transfer an electrical signal from its input side to its output side. A higher Current Transfer Ratio (Max) value typically indicates better performance and stronger signal transmission capabilities for the optocoupler. It is an important specification to consider when designing circuits that require isolation between different electrical systems or components.
320% @ 10mA - Turn On / Turn Off Time (Typ)
Turn On / Turn Off Time (Typ) in electronic components refers to the time it takes for a device to switch from a non-conducting state to a conducting state (Turn On) and vice versa (Turn Off). This parameter is crucial for understanding the speed and responsiveness of the component in switching applications. It typically indicates the average time under specified conditions and is essential for optimizing the performance in circuits where rapid switching is required, such as in power electronics and digital logic devices.
3μs, 2.3μs - Max Junction Temperature (Tj)
Max Junction Temperature (Tj) refers to the maximum allowable temperature at the junction of a semiconductor device, such as a transistor or integrated circuit. It is a critical parameter that influences the performance, reliability, and lifespan of the component. Exceeding this temperature can lead to thermal runaway, breakdown, or permanent damage to the device. Proper thermal management is essential to ensure the junction temperature remains within safe operating limits during device operation.
100°C - Vce Saturation (Max)
Vce Saturation (Max) is a parameter commonly found in datasheets of bipolar junction transistors (BJTs) and refers to the maximum voltage drop across the collector-emitter junction when the transistor is fully saturated. When a BJT is in saturation mode, it is fully turned on and acts like a closed switch, allowing maximum current to flow through it. The Vce Saturation (Max) value indicates the maximum voltage that can be dropped across the collector-emitter junction in this state without affecting the transistor's performance. It is an important parameter to consider when designing circuits to ensure proper operation and efficiency of the transistor.
400mV - Ambient Temperature Range High
This varies from person to person, but it is somewhere between 68 and 77 degrees F on average. The temperature setting that is comfortable for an individual may fluctuate with humidity and outside temperature as well. The temperature of an air conditioned room can also be considered ambient temperature.
100°C - Height4.3mm
- REACH SVHC
The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.
No SVHC - Radiation Hardening
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation, especially for environments in outer space (especially beyond the low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear warfare.
No - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant - Lead Free
Lead Free is a term used to describe electronic components that do not contain lead as part of their composition. Lead is a toxic material that can have harmful effects on human health and the environment, so the electronics industry has been moving towards lead-free components to reduce these risks. Lead-free components are typically made using alternative materials such as silver, copper, and tin. Manufacturers must comply with regulations such as the Restriction of Hazardous Substances (RoHS) directive to ensure that their products are lead-free and environmentally friendly.
Lead Free
Parts with Similar Specs
- ImagePart NumberManufacturerPackage / CaseNumber of PinsNumber of ChannelsVoltage - IsolationCurrent Transfer Ratio (Max)Current Transfer Ratio (Min)Rise TimeMax Output VoltageOutput VoltageForward VoltageView Compare
SFH620A-3
4-DIP (0.300, 7.62mm)
4
1
5300Vrms
320% @ 10mA
100% @ 10mA
2 μs
70 V
70 V
1.25 V
Datasheet PDF
- Datasheets :
- RohsStatement :
- PCN Design/Specification :
- Mfg CAD Models :
Trend Analysis
What type of emitter does the SFH620A have?
GaAs infrared diode emitter.
What are the coupling devices designed for?
Signal transmission between two electrically separated circuits.
What is the end-stackable length of the coupling devices?
2.54 mm lead spacing.
What clearance distance is achieved with option 6?
8 mm.
What is the DIN VDE 0805?
IEC 6 0950.
How many parts does SFH620A have?
Two
How many VRMS does SFH620A provide?
5300 VRMS.
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