In-depth Exploration of the BT131: Applications and Advantages of a High-Performance Bidirectional Thyristor

As a leading domestic manufacturer of electronic components, Guangdong Jiaxun Electronics is committed to delivering highly reliable solutions for industrial control and consumer electronics. Today, we’re introducing one of our flagship products—the BT131 bidirectional thyristor, which is widely used in applications such as motor speed control and temperature regulation.

Author: Guangdong Jiaxun Electronics Co., Ltd.

I. Product Background

As a leading domestic manufacturer of electronic components, Guangdong Jiaxun Electronics is committed to delivering highly reliable solutions for industrial control and consumer electronics. Today, we’d like to introduce one of our flagship products— BT131 Triac , widely used in applications such as motor speed control and temperature regulation.

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II. Core Features of BT131

1. Innovative process

• Five-layer NPNPN structure : through Single-sided grooving technology and Glass passivation process for countertops , significantly enhances voltage withstand capability ( 800V ) and temperature stability (supporting a range from -40°C to +125°C).
• Multilayer metallized electrode : Optimize current distribution to reduce conduction losses.

 

1. Key Performance Advantages

• High surge current : Support 10A surge current (20 ms) , suitable for high‑impact applications such as motor starting.
• Quick response : The critical rate of rise of on-state current reaches 50 A/μs , ensuring efficient control.

 

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III. Typical Application Scenarios

1. Vacuum Cleaners and Power Tools

• By adjusting the trigger current ( 4-10mA ), enabling stepless speed control and enhancing the user experience.

 

1. Solid-state relay

• Low trigger voltage ( ≤1.5V ) and high blocking voltage ( 800V ), ensuring the reliability of the switch.

 

1. Intelligent Temperature Control System

• Combined threshold voltage ( 0.92V ) and the slope resistance ( 36.8 mΩ ), precisely controlling the heating power.

 

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IV. Quick Overview of Key Parameters

Parameter	Numerical value	Unit
RMS on-state current	1A (Tc=90℃)	A
Off-state peak voltage	800V	V
Trigger current range	4-10mA	mA
Package thermal resistance	11.3℃/W	°C/W

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V. Packaging and Selection Recommendations

• TO-92 package : Compact design (pin pitch 1.27mm ), suitable for high-density PCB layouts.
• Thermal Optimization : We recommend using it with a heatsink to ensure stable operation in high-temperature environments.

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Conclusion
With its high reliability and broad applicability, the BT131 has become the preferred component in the industrial control field. For technical documentation or sample support, please contact Guangdong Jiaxun Electronics!