Part Number: BTA140-800

Manufacturer: WeEn Semiconductors

Description: TRIAC 800V, 25A, TO220AB

Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of BTA140-800,127

Datasheet  BTA140-800,127 datasheet
Category Discrete Semiconductor Products
Family Thyristors – TRIACs
Manufacturer NXP Semiconductors
Packaging Tube
Triac Type Standard
Voltage – Off State 800V
Current – On State (It (RMS)) (Max) 25A
Voltage – Gate Trigger (Vgt) (Max) 1.5V
Current – Non Rep. Surge 50, 60Hz (Itsm) 190A, 209A
Current – Gate Trigger (Igt) (Max) 35mA
Current – Hold (Ih) (Max) 60mA
Configuration Single
Mounting Type Through Hole
Package / Case TO-220-3
Supplier Device Package TO-220AB

BTA140-800,127 Introduction

The BTA140-800 is an amazing four-quadrant planar triac that comes in a plastic SOT78 (T0-220AB) package. This device is made to work well in applications that need high thermal cycling performance and excellent bidirectional transient and blocking voltage capability. Its advanced features and strong design make it a good choice for a wide range of uses where controlling alternating current (AC) power in an efficient and precise way is important.

In many applications, it is essential to have high bidirectional transient and blocking voltage capability. Because of this, the triac can handle high voltage transients and block voltage spikes well, making sure that sensitive electrical components work well and are safe. Because the BTA140-800 can handle these changes in voltage, it can be used for things like controlling motors, lighting, heating, and power sources.

Also, the BTA140-800 has a high thermal cycling performance, which means that it can withstand multiple thermal stresses without losing its ability to work. This is especially important in situations where the temperature of the triac changes a lot, such as in circuits that run motors or heating systems. The triac’s ability to keep working under these conditions makes it long-lasting and reduces the chance that it will break down too soon.

The BTA140-800 triac stands out because it can handle high bidirectional transient and blocking voltages and has great thermal cycle performance. Because of these features, it is useful in a wide range of applications that need reliable control of AC power. The BTA140-800 is a reliable choice that ensures precise and efficient operation. It can be used to control motors, lights, heating, or power sources.

BTA140-800,127 General Description

Designed for use in applications needing strong bidirectional transient and blocking voltage capability as well as high thermal cycling performance, the four-quadrant planar passivated triac comes in a SOT78 (T0-220AB) plastic package.

BTA140-800,127 Features and benefits

  • high capability for blocking voltage
  • high noise resistance.
  • Planar passivated for voltage reliability and toughness
  • occurrence in each of the four quadrants.

Overview of BTA140-800

A planar passivated four-quadrant triac with remarkable performance and dependability in a range of AC power control applications is the BTA140-800. Let’s examine its electrical specs in depth and then examine the benefits of its SOT78 (T0-220AB) package.

In-depth Description: Planar passivated technology is used in the construction of the BTA140-800 to increase reliability and enable fast switching. This technology also lowers the triggering current needed, increasing the effectiveness of managing AC power.

The triac functions as a four-quadrant device that allows current to flow both ways. It controls AC current in both directions by connecting two thyristors back-to-back. With the help of this feature, the BTA140-800 is able to turn on and off at particular points in the AC waveform, enabling accurate power control.

Electrical specs: Take into account the following electrical specs to comprehend the BTA140-800’s capabilities:

● Maximum voltage and current ratings

It is usual to have a high rating for the maximum repeated peak off-state voltage (VDRM), such as 800 volts. This rating guarantees that the triac can endure blocking voltage spikes and high voltage transients.

The continuous current the triac can tolerate under typical operating conditions is determined by the maximum RMS on-state current (IT (RMS)) standard.

● Gate trigger voltage

The minimal voltage needed to turn on the triac and start conduction through the device is defined by the gate trigger voltage (VGT). This variable must be taken into account during the design phase in order to provide proper control of the triac.

● Holding Current

The minimal current necessary to keep the triac in a conducting condition after it has been triggered is known as the holding current (IH). To guarantee the stability of the triac’s conduction, it is a crucial parameter.

● On-State Voltage Drop

The on-state voltage drop (VTM) is a measurement of the voltage across the triac while it is conducting. In order to reduce power loss and increase effectiveness in AC power control applications, it is necessary to take this voltage drop into account.

SOT78 (T0-220AB) Package and Benefits The BTA140-800 is housed in a SOT78 (T0-220AB) plastic package. This package type offers several advantages:

  • Thermal Control: The T0-220AB package’s bigger size and metal tab improve the triac’s ability to dissipate heat. Effective heat transmission to a heat sink is made possible, ensuring optimum cooling and avoiding overheating problems.
  • Mechanical Robustness and Strength: The T0-220AB package offers robustness and mechanical strength to endure a variety of mechanical stressors and environmental conditions. It guarantees the triac’s longevity and long-term dependability in demanding applications.

In conclusion, the planar passivated four-quadrant triac known as the BTA140-800 has remarkable electrical performance. Precise AC power regulation is made possible by the device’s electrical parameters, which include the maximum voltage and current ratings, gate trigger voltage, holding current, and on-state voltage drop. The SOT78 (T0-220AB) package also provides benefits in terms of temperature control and mechanical toughness, ensuring the BTA140-800’s dependability and lifespan in a variety of applications.

Triac Operation and Working Principle

Triacs use thyristor technology, including the BTA140-800. Regulating current flow in both directions allows fine AC power regulation. Triacs work like this:

  • Operation: Two bilateral or bidirectional thyristors form the triac. Triggered thyristors conduct current in one direction. Together, they allow bidirectional current flow.
  • Working Principle: Voltage at the triac’s gate terminal causes conduction. The triac turns on when its forward breakover voltage (VBO) is reached. The triac conducts until the current falls below the holding current (IH).
  • Four Quadrant Operation: The BTA140-800 is a four-quadrant triac, allowing current flow in all four AC waveform quadrants (positive and negative half-cycles). Triac triggering at specified AC waveform points controls bidirectional current.

The triac turns on and conducts current when the AC waveform’s positive half-cycles reach the forward breakover voltage. The triac turns on and allows opposite-direction current flow during negative half-cycles when the voltage reaches the reverse breakover voltage.

The BTA140-800 is ideal for motor control, lighting control, and heating systems because of its four-quadrant AC power control.

The voltage on the gate terminal triggers the BTA140-800. Two common triggers are:

Gate activation: The triac turns on when the gate terminal receives a voltage greater than VGT. Microcontrollers or other low-power control circuits can drive the triac since its gate current is minimal.

Noise Snubbers: Inductive loads and motor control can cause switching noise or voltage spikes. Snubber circuits decrease these effects and improve triac performance and reliability. Snubber circuits minimize voltage spikes and electromagnetic interference with resistors, capacitors, and diodes.

The BTA140-800 controls AC power while minimizing noise and voltage disturbances using proper triggering and snubber circuits.

In AC power control applications, the four-quadrant triac BTA140-800 allows bidirectional current flow. Gate triggering and snubber circuits allow precise power regulation while retaining device durability and performance.


In high-performance systems that demand superior bidirectional transient and blocking voltage capability as well as strong thermal cycling performance, the BTA140-800 triac stands out as a critical component. For engineers and designers looking for precise and effective AC power regulation in their applications, it is the perfect option because of its extensive capabilities and dependability.

We at ICRFQ are dedicated to providing our clients with the best possible support and help. Contact us right away to find out how the BTA140-800 triac may enhance your technical concepts. Start your innovations with confidence and maximize this reliable connectivity.

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