BT134-800,127

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Thyristors - TRIACs refer to three-terminal semiconductor switching components, which are widely used in AC and AC control power circuits. The BT134-800,127 is one of them. It has the characteristics of low on-voltage triggering and high sensitivity, which provides high reliability and long life.

The BT134-800,127 consists of two connected SCRs and has three terminals: MT1 (main terminal 1), MT2 and gate terminal. Each of the MT1 and MT2 terminals has a unilateral controllability and can be regarded as an independent SCR. When connected to an AC power supply, when the MT1 is positive and the MT2 is negative, and thus, a positive pulse is applied to the gate, then the BT134-800,127 can be turned on.

The BT134-800,127 has three application fields, namely, light dimmers, motors and heaters.

In terms of light dimmers, the BT134-800,127 is used for AC dimming control. In this way, the lights can be adjusted to a comfortable and suitable brightness for different occasions. In motors, the BT134-800,127 is used for speed control, which can be achieved by controlling the phase, adjusting the voltage, and adjusting the current. Heat control is achieved by controlling the on and off time of the BT134-800,127 through the gate control, which can achieve the purpose of controlling the process temperature of the AC heater.

The BT134-800,127 is also widely used in many other electrical equipment, such as microwave ovens and safety switches.

The working principle of BT134-800,127 is relatively simple. When a positive voltage is applied to the gate terminal, the BT134-800,127 is turned on, allowing current to flow between MT1 and MT2.

Since the triggering voltage of the BT134-800,127 is relatively low, usually between 1.6V and 2.5V, it can be turned on quickly and be controlled fluently, which provides a high reliability in controlling circuits.

When current flows between MT1 and MT2 and it reaches a certain value, the BT134-800,127 will be turned off automatically and can switch from conduction state to non-conduction state quickly.

In certain cases, for example when the ambient temperature is too high or too low, or when the current gets too high, it may well be that the BT134-800,127 fails to respond as expected. This can be resolved by using a snubber circuit to reduce the extreme voltage spikes, or by using a gate resistor to limit the current.

In summary, the BT134-800,127 is a three-terminal semiconductor switching component, classified in the Thyristors - TRIACs family, with three application fields (light dimmer, motor, heater) and a simple working principle. Its low on-voltage triggering and high sensitivity make it a reliable choice for AC-controlled power circuits.

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