BTA12 Triacs: Features, Pinout, and Datasheet [Video&FAQ]
TRIAC 700V 12A TO220AB
BTA12 is a 12 A Snubberless™, logic level and standard triacs. This article mainly introduces features, pinout, datasheet and other detailed information about STMicroelectronics BTA12.

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BTA12 Description
The BTA12 triac family consists of glass passivated PNPN devices with good performance.
These components are appropriate for general-purpose applications that demand a high surge current capacity. Phase control and static switching on inductive or resistive loads are examples of applications.
BTA12 Pinout
BTA12 CAD Model
BTA12 Features
• High Surge Current Capability
• Commutation: (dV/dt)c > 5 V/µs
• High Commutation (4Q) or Extremely High Commutation (3Q) Capability
• Low Thermal Resistance with Clip Bonding
• Low Thermal Resistance Insulating Ceramic for Insulated BTA
• UL1557 Certified BTA Series (File ref: 81734)
• RoHS (2002/95/EC) Compliant Packaging
• Medium Current Triac
Specifications
- TypeParameter
- Factory Lead Time19 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.
TO-220-3 - Number of Pins3
- Weight6.000006g
- 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.
-40°C~125°C TJ - 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 - 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
Not Applicable - ECCN Code
An ECCN (Export Control Classification Number) is an alphanumeric code used by the U.S. Bureau of Industry and Security to identify and categorize electronic components and other dual-use items that may require an export license based on their technical characteristics and potential for military use.
EAR99 - 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.
700V - Current Rating
Current rating is the maximum current that a fuse will carry for an indefinite period without too much deterioration of the fuse element.
12A - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
BTA12 - 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 - Max Repetitive Reverse Voltage (Vrrm)
The Max Repetitive Reverse Voltage (Vrrm) is a crucial parameter in electronic components, particularly in diodes and transistors. It refers to the maximum voltage that can be applied across the component in the reverse direction without causing damage. This parameter is important for ensuring the proper functioning and longevity of the component in circuits where reverse voltage may be present. Exceeding the Vrrm rating can lead to breakdown and failure of the component, so it is essential to carefully consider this specification when designing or selecting components for a circuit.
700V - RMS Current (Irms)
RMS Current (Irms) refers to the Root Mean Square value of the alternating current flowing through an electronic component or circuit. It is a measure of the effective current that produces the same heating effect as the equivalent DC current. In AC circuits, the current continuously changes direction, so using the RMS value helps in calculating power dissipation and determining the component's capability to handle the current without overheating. RMS Current is crucial in selecting components like resistors, capacitors, and inductors to ensure they can safely operate within their specified current ratings.
12A - Hold Current
the minimum current which must pass through a circuit in order for it to remain in the 'ON' state.
50mA - Trigger Device Type
Trigger Device Type is a parameter in electronic components that refers to the type of device or mechanism used to initiate a specific action or function within the component. This parameter specifies the specific trigger device, such as a sensor, switch, or signal input, that is required to activate or control the operation of the component. Understanding the trigger device type is crucial for proper integration and operation of the electronic component within a larger system or circuit. By specifying the appropriate trigger device type, engineers and designers can ensure that the component functions correctly and responds to the intended input signals or conditions.
TRIAC - Voltage - Gate Trigger (Vgt) (Max)
Voltage - Gate Trigger (Vgt) (Max) refers to the maximum voltage level required to trigger the gate of a semiconductor device, such as a thyristor or triac, into the conductive state. When the gate receives this voltage, it initiates the device's conduction, allowing current to flow between its anode and cathode. Exceeding this voltage can lead to unwanted behavior or damage to the component, making it a critical parameter in designing circuits that utilize these devices. Understanding Vgt is essential for ensuring proper operation and reliability in electronic applications.
1.3V - Current - Non Rep. Surge 50, 60Hz (Itsm)
The parameter "Current - Non Rep. Surge 50, 60Hz (Itsm)" in electronic components refers to the maximum non-repetitive surge current that a component can withstand without damage during a single surge event at frequencies of 50Hz or 60Hz. This parameter is important for assessing the robustness and reliability of the component in handling sudden spikes or surges in current that may occur in the electrical system. It helps in determining the level of protection needed for the component to ensure its longevity and proper functioning in various operating conditions. Manufacturers provide this specification to guide engineers and designers in selecting the appropriate components for their applications based on the expected surge current levels.
120A 126A - Current - Gate Trigger (Igt) (Max)
Current - Gate Trigger (Igt) (Max) refers to the maximum gate trigger current required to activate a semiconductor device, such as a thyristor or triac. It is the minimum current that must flow into the gate terminal to ensure that the device turns on and conducts current between its anode and cathode. Exceeding this value can lead to unnecessary power consumption, while insufficient current may prevent the device from turning on effectively. This parameter is crucial for circuit design, as it influences the selection of gate driving circuits.
50mA - Leakage Current (Max)
Leakage Current (Max) is a parameter that specifies the maximum amount of current that can flow through an electronic component when it is in an off state. It represents the amount of current that leaks through the component due to imperfections in its insulation or semiconductor materials. Excessive leakage current can lead to power loss, reduced efficiency, and potential reliability issues in electronic circuits. Manufacturers provide this specification to help designers ensure that the leakage current does not exceed acceptable limits for the intended application. It is typically measured in microamps (μA) or nanoamps (nA) and is an important consideration in low-power and high-precision electronic designs.
0.5mA - Critical Rate of Rise of Off-State Voltage-Min
The parameter "Critical Rate of Rise of Off-State Voltage-Min" in electronic components refers to the minimum rate at which the off-state voltage of a device must rise in order to trigger a critical event, such as a breakdown or failure. This parameter is crucial for ensuring the reliable operation of the component under various conditions. It helps determine the maximum allowable rate of voltage increase that the component can withstand without experiencing detrimental effects. Manufacturers specify this parameter to guide engineers and designers in selecting and using the component within its safe operating limits to prevent damage or malfunction. Understanding and adhering to this parameter is essential for maintaining the performance and longevity of electronic devices.
100V/us - Triac Type
Triac Type refers to the classification of triacs based on their electrical characteristics and applications. Triacs are semiconductor devices that can control current flow in both directions and are commonly used in AC power control. Different types of triacs may have variations in parameters such as voltage rating, current rating, triggering method, and switching speed, making them suitable for specific applications like light dimmers, motor speed controls, and heating regulation. Understanding the triac type is crucial for selecting the appropriate component for a given circuit design.
Standard - On-State Voltage-Max
The parameter "On-State Voltage-Max" in electronic components refers to the maximum voltage drop across the component when it is in the fully conducting state. This parameter is important because it indicates the maximum voltage that can be applied across the component while still allowing current to flow through it efficiently. Exceeding this voltage may lead to overheating, damage, or even failure of the component. Designers and engineers use this parameter to ensure that the component is operated within its safe operating limits to maintain reliability and performance in the circuit.
1.5V - Critical Rate of Rise of Commutation Voltage-Min
The Critical Rate of Rise of Commutation Voltage-Min is a parameter in electronic components, particularly in thyristors and power electronics. It refers to the minimum speed at which the voltage across the device's terminals can rise during the turn-off process without causing unwanted turn-on events or false triggering. This parameter is crucial for ensuring the reliable operation of the component in high-frequency applications and helps prevent damage from voltage transients that exceed safe thresholds. In essence, it defines the limits for safe voltage rise times to maintain proper device performance.
10V/us - 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
BTA12 Typical Application
The following figure is to switch AC mains.

Typical Application
BTA12-600B Equivalent
BTA12 Alternatives
| Part Number | Description | Manufacturer |
| Q8012LH5TRIGGER DEVICES | Alternistor TRIAC, 800V V(DRM), 12A I(T)RMS, TO-220AB, ROHS COMPLIANT, PLASTIC, ISOLATED TO-220AB, 3 PIN | Littelfuse Inc |
| Q7012LH5TRIGGER DEVICES | Alternistor TRIAC, 700V V(DRM), 12A I(T)RMS, TO-220AB, THERMOTAB-3 | Littelfuse Inc |
| MAC212A10FPTRIGGER DEVICES | 800V, 12A, 4 QUADRANT LOGIC LEVEL TRIAC, PLASTIC, TO-220FP, 3 PIN | onsemi |
BTA12 Applications
• ON/OFF
• Phase angle function in applications such as static relays
• Light dimmers and appliance motors speed controllers
• The snubberless versions (BTA/BTB...W and T12 series)
• The BTA series provides an insulated tab (rated at 2500 V RMS)
BTA12 Package
BTA12 Manufacturer
STMicroelectronics, headquartered in Plan-les-Ouates, Switzerland, near Geneva, is a multinational electronics and semiconductors firm. The company was created in 1987 by the merger of two government-owned semiconductor companies: "Thomson Semiconductors" in France and "SGS Microelettronica" in Italy. It is known as "ST" and is the most profitable semiconductor chip producer in Europe. While the corporate headquarters and EMEA regional offices of STMicroelectronics are in Geneva, the holding company, STMicroelectronics N.V., is based in the Netherlands.
Trend Analysis
Datasheet PDF
- Datasheets :
1.Can the BTA12600B and BTA12800B be replaced?
When the voltage does not exceed 600V, they can be replaced with each other. It is necessary to pay attention to the replacement of the triode. Instead of using all the parameters of the triode, only some of the parameters are used. Therefore, the first replacement principle is to look at the function. For example, the triode used for high-frequency small-signal amplification mainly depends on the frequency of use of the triode. Second, look at the magnification. If it is used for low-frequency and high-power amplification, it mainly depends on the power, Uce (withstand voltage), Ice (maximum current) of the transistor, and secondly, the frequency of the transistor. For example, audio amplifier circuits have no requirements for frequency; power amplifiers and power supply circuits must pay attention to parameters such as Pcm and Vcb0; high frequency/intermediate frequency amplifiers and oscillation circuits must pay attention to the number of frequencies.
2.Can BTA12-600B and BTA12-600C be used in common?
The main data of BTA12-600B and BTA12-600C are the same, but some indicators are different. The maximum trigger current of BTA12-600B is 50MA; BTA12-600C is 25MA; The dv/dt voltage rise rate tolerance is also different, B-400 volts/microsecond; C-200 volts/microsecond. If the voltage change rate is not large in your application, or if it is zero-crossing conduction, the two can be used in common. If you use the occasion where the instantaneous voltage rise rate is very high, consider increasing the resistance and capacitance absorption, which can also be used universally.
3.Can the triac BTA12-600B be turned off?
Not only triacs, general unidirectional SCRs and standard SCRs can only control its turn-on, and turn-off is when the current flowing through it is small to a certain value (maintenance current ), and this will turn off the control pole naturally when there is no additional signal, so the thyristor is a bit more troublesome in use. When you want to turn it off when it is used in DC, you have to give it It can only be completed after it creates a condition that is smaller than its maintenance current.
4. What type of devices does the BTA12 triac family consist of?
Glass passivated PNPN devices with good performance.
5. What type of current capacity does the BTA12 triac require?
High surge current capacity.
6. What are examples of a BTA12 triac?
Phase control and static switching on inductive or resistive loads.
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