PC123 Photocoupler: PC123 vs.PC817, Equivalents, Datasheet
OPTOISOLATR 5KV TRANSISTOR 4-DIP
The PC123 comes from PC123 Series which contains an IRED optically coupled to a phototransistor.This post covers its pinout, datasheet and other detailed information. And more, Huge range of Semiconductors, Capacitors, Resistors and ICs in stock. Welcome RFQ.

LED flasher Using Optocoupler PC123 or PC817 | Easy With circuit Diagram
PC123 Pinout

PC123 Pinout
PC123 Description
The PC123 comes from PC123 Series which contains an IRED optically coupled to a phototransistor.
It is packaged in a 4-pin DIP, available in wide-lead spacing option and SMT gullwing lead-form option.
Input-output isolation voltage(rms) is 5.0kV.
CTR is 50% to 400% at an input current of 5mA.
PC123 CAD Model
Symbol

PC123 Symbol
Footprint

PC123 Footprint
3D Model

PC123 3D Model
Specifications
- TypeParameter
- 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) - Current Transfer Ratio-Min50% @ 5mA
- Number of Elements1
- 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.
-30°C~100°C - Published1996
- 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 - JESD-609 Code
The "JESD-609 Code" in electronic components refers to a standardized marking code that indicates the lead-free solder composition and finish of electronic components for compliance with environmental regulations.
e0 - Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Obsolete - 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) - Terminal Finish
Terminal Finish refers to the surface treatment applied to the terminals or leads of electronic components to enhance their performance and longevity. It can improve solderability, corrosion resistance, and overall reliability of the connection in electronic assemblies. Common finishes include nickel, gold, and tin, each possessing distinct properties suitable for various applications. The choice of terminal finish can significantly impact the durability and effectiveness of electronic devices.
Tin/Lead (Sn/Pb) - Additional Feature
Any Feature, including a modified Existing Feature, that is not an Existing Feature.
UL RECOGNIZED - Reach Compliance Code
Reach Compliance Code refers to a designation indicating that electronic components meet the requirements set by the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation in the European Union. It signifies that the manufacturer has assessed and managed the chemical substances within the components to ensure safety and environmental protection. This code is vital for compliance with regulations aimed at minimizing risks associated with hazardous substances in electronic products.
unknown - 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.
5000Vrms - 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 - Configuration
The parameter "Configuration" in electronic components refers to the specific arrangement or setup of the components within a circuit or system. It encompasses how individual elements are interconnected and their physical layout. Configuration can affect the functionality, performance, and efficiency of the electronic system, and may influence factors such as signal flow, impedance, and power distribution. Understanding the configuration is essential for design, troubleshooting, and optimizing electronic devices.
SINGLE - Number of Channels1
- 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.
1.2V - 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.
DC - 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 - 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.
200mV - 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.
4μs 3μs - Forward Current-Max
Forward Current-Max is a parameter used to specify the maximum amount of current that an electronic component, such as a diode or LED, can safely handle when it is forward-biased. This parameter is crucial for determining the operating limits of the component to prevent damage or failure due to excessive current flow. Exceeding the specified Forward Current-Max can lead to overheating, degradation of the component, or even permanent damage. It is important to carefully consider this parameter when designing circuits to ensure the component operates within its safe limits.
0.05A - 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.
600% @ 5mA - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
Non-RoHS 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.
Contains Lead
PC123 Feature
1. 4-pin DIP package
2. Double transfer mould package (Ideal for Flow Soldering)
3. Current transfer ratio (CTR: MIN. 50% at IF=5 mA, VCE=5V)
4. Several CTR ranks are available
5. Reinforced insulation type (Isolation distance: MIN. 0.4mm)
6. Long creepage distance type (wide lead-form type only: MIN. 8mm)
7. High isolation voltage between input and output (Viso(RMS) : 5.0 kV)
PC123 Application
1. I/O isolation for MCUs (Micro Controller Units)
2. Noise suppression in switching circuits
3. Signal transmission between circuits of different potentials and impedances
4. Overvoltage detection
PC123 Equivalents
The equivalents for PC123: PC816, PC817, TLP621, TLP321, TLP421, PC17K1, H11A817, SFH615A, PS2501-1, PS2561-1, PS2571-1, LTV-816, LTV-817(-V), LTV123, LTV-610 K1010, K817P, SFH615A.
PC123 vs. PC817
| Part Number | PC817 | PC123 |
| Rohs Code | No | |
| Part Life Cycle Code | Obsolete | Obsolete |
| Package Description | DIP-4 | O-LALF-W2 |
| Reach Compliance Code | unknown | unknown |
| Additional Feature | UL RECOGNIZED | HIGH Q |
| Coll-Emtr Bkdn Voltage-Min | 35 V | |
| Configuration | SINGLE | SINGLE |
| Current Transfer Ratio-Nom | 0.5 | |
| Dark Current-Max | 100 nA | |
| Forward Current-Max | 0.05 A | |
| Isolation Voltage-Max | 5000 V | |
| JESD-609 Code | e0 | e0 |
| Number of Elements | 1 | 1 |
| Operating Temperature-Max | 100 C | 150 C |
| Operating Temperature-Min | 30 C | 65 C |
| Optoelectronic Device Type | TRANSISTOR OUTPUT OPTOCOUPLER | |
| Terminal Finish | Tin/Lead (Sn/Pb) | TIN LEAD |
PC123 vs. PC817
PC123 Package

PC123 Package
PC123 Manufacturer
Sharp Microelectronics of the Americas (SMA), in Camas, Washington, is the division of Sharp Electronics Corporation (a subsidiary of Sharp Corporation) to sell and market microelectronics. It ranks as a leading manufacturer providing an extensive portfolio of electronic components including innovative LCD, optoelectronics, memory, imager, and RF components. SMA provides products, expertise, and support for globally leading manufacturers of consumer and business technologies to realize their visions.
Datasheet PDF
- Datasheets :
What is PC123?
The PC123 comes from PC123 Series which contains an IRED optically coupled to a phototransistor. It is packaged in a 4-pin DIP, available in wide-lead spacing option and SMT gullwing lead-form option. Input-output isolation voltage(rms) is 5.0kV. CTR is 50% to 400% at an input current of 5mA.
What package is PC123 available in?
It is packaged in a 4-pin DIP, available in wide-lead spacing option and SMT gullwing lead-form option.
What is the difference between optocoupler PC123 and 817?
PC123 reverse voltage Vceo=70V, PC817 reverse voltage Vceo=35V slightly lower, the frequency is both 80KHz. The more you can refer to the specific parameters.
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