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Thyristors - TRIACs

Thyristors (Thyristors) are an important type of semiconductor devices, also known as SCRs (silicon controlled rectifiers), belonging to the family of unidirectional and bidirectional controllable semiconductor devices. BTA312B-600C is a type of thyristors.

BTA312B-600C Characteristics

BTA312B-600C is a three-terminal two-way thyristor device, its main feature is to keep the forward biased in the current and non-forward biased state, the device into the current will not break down. Another advantage of BTA312B-600C is that its reverse breakdown voltage is relatively high, and its total gate power is limited, so unintentional triggering will not occur.

118 application field and working principle

Application Fields

BTA312B-600C is usually used in switch resonance, the main application areas are:

• Speed control system of constant speed motor
• Accuracy control system such as temperature control or thermostat
• Light dimmers, controllers for halogen, incandescent, xenon, and fluorescent lighting
• Electric and induction heating devices, solid-state relay
• Various instruments and protection equipment

Working Principle

The large AC power is generally subjected to alternative switching control of the small AC power. The BTA312B-600C is triggered by a small DC-AC control power converter, and a variable small AC power is obtained after the DC conversion, thereby achieving AC power control.

The BTA312B-600C requires a certain trigger current to take the turn-on action. This trigger current is enough to exceed the turn-off current at the same time, thus ensuring the turn-on action of the BTA312B-600C. When the control voltage Vg is higher or equal to Vbo, the BTA312B-600C will turn on and form a low impedance conduction, and the current of the load flows through. BTA312B-600C can also be used to cut off the circuit, while the drop of anode current is limited to 35mV because of the positive temperature coefficient.

BTA312B-600C is an ideal choice for applications to control AC signals because no additional parts are needed to trigger. By controlling the magnitude of the control pattern and therefore adjusting the trigger current, the current corresponding to the input control signal can be precisely adjusted, so that the AC signal transmitted out can be designed and adjusted.

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