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BT169H,112 application field and working principle

The BT169H,112 is a Thyristor, otherwise known as a Silicon Controlled Rectifier (SCR). They are a type of transistor specifically designed to control the flow of electricity in direct current (DC) circuits. The BT169H,112 is most commonly used as a switch in power control applications, such as controlling motors, relays, and switching power amplifiers. The BT169H,112 can also be used in rectifier circuits to convert alternating current (AC) mains power into DC power used in circuits that require a more precise and stable voltage.

Characteristics of the BT169H,112

The BT169H,112 is a three-terminal, bidirectional device which consists of a n-type Silicon Controlled Rectifier (SCR) with a resistive gate. It is a unidirectional, blocking device meaning that current only flows in the anode-to-cathode direction. It contains an integrated resistor in its gate which controls the current threshold that must be present before the device conducts. This is the purpose of the gate terminal, which is used to control the holding and triggering current that activates the device. The typical peak VDRM voltage for this device is rated at 7 Volts, with a Maximum Repetitive VDRM of 80V.

Working Principle

The working principle of the BT169H,112 is quite simple. The device works by acting as a controlled switch, where the gate terminal is used to control the holding and triggering current which activates the SCR. To turn the device ON, an external voltage is applied to the gate terminal, which raises the current threshold that needs to be present in order for the SCR to conduct. Once this threshold is met, the device will stay ON until the current is reduced to a level that is lower than the triggering current. To turn the device OFF, the external voltage needs to be removed from the gate terminal.

Applications

The BT169H,112 has a variety of applications. Its primary application is to act as a switch in power control applications, such as controlling motors and relays, and switching power amplifiers. It can also be used in rectifier circuits to convert AC mains power into DC power used in circuits that require a more precise and stable voltage. The BT169H,112 is also frequently used in medical equipment and as an input device in computers.

Conclusion

The BT169H,112 is a Thyristor, otherwise known as a Silicon Controlled Rectifier (SCR). It is most commonly used as a switch in power control applications, such as controlling motors, relays, and switching power amplifiers. It can also be used in rectifier circuits to convert AC mains power into DC power used in circuits that require a more precise and stable voltage. The BT169H,112 is a three-terminal, bidirectional device which consists of a n-type SCR with a resistive gate, and works by acting as a controlled switch.

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