BT138B-800E,118

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Thyristors - TRIACs are a members of the thyristor family and operate as three-terminal bidirectional switches. It is designed to switch on or off in response to a small current or voltage signal, providing differing levels of control over on/off switching events. It is mainly used in power control boards in places such as automotive, military and industrial applications.

BT138B-800E TRIAC is an affordable 3-terminal bidirectional switching transistor suitable for switching AC loads such as motors, lights, heaters, and solenoids. It features a maximum gate current of 800mA and a hold current of 1mA. This product is RoHS-compliant and has a maximum junction temperature of 150°C. It is typically used in applications such as motor control, load switching, lamp control, and industrial lighting.

The main principle of the BT138B-800E is to use a signal to trigger the switching event. When the gate current is applied and the voltage across the gate and main terminal is sufficient, the TRIAC turns "on" allowing current to flow in both directions. When the gate current is decreased, or the signal is stopped, the TRIAC turns "off," breaking the current flow. This makes it an ideal choice for applications where precise or variable control of on/off switching events is required.

Applications for BT138B-800E TRIACs include AC motor speed control, AC voltage regulators, temperature and light control systems, power electronic dimmers, thyristor chopper control, and AC current sensing circuiting. Other applications include AC current regulators, high and low voltage switch, power factor control circuits, domestic and industrial light dimmers, and thermo-tunnelling control systems.

The BT138B-800E provides a reliable, cost-effective solution to controlling switching events. Its robust construction, high temperature operating capabilities and large gate current handling capacity make it an ideal choice for many applications. Its ability to sense small AC input signals makes it especially useful in areas where precise control of switching events is required. It is an excellent solution for providing robust, low-cost AC switching capability for industrial, automotive and military applications.

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