Thyristors - SCRs

Thyristors, also referred to as silicon controlled rectifiers (SCRs), are commonly used electronic components in a variety of applications, such as power supplies, motors, and amplifiers. The thyristor is basically an electronic switch that can allow current to flow or block current depending on the control signal. Thyristors are usually fabricated from special materials, such as silicon. This article will focus on the N0118GA,412 SCR, its application fields, and its working principle.

Application Fields

The N0118GA,412 SCR is designed specifically for use in ac applications, such as welding machines, dimmers, phase control circuits, and industrial speed controllers. This SCR can work at frequencies ranging from 50 Hz to 400 Hz with peak voltages up to 880 volts. Additionally, this SCR is suitable for use in low-voltage switching applications, such as automotive relays and home appliance controls. The N0118GA,412 has a 400-amp peak current rating and a 200-amp continuous current rating.

Working Principle

Thyristors such as the N0118GA,412 are triggered using a control signal. This signal, usually in the form of a voltage or current, is applied to the control or gate terminal of the component, usually through a resistor. This control signal activates the thyristor and allows current to flow through the component. The N0118GA,412 is designed to turn on with a minimal voltage drop and have a maximum On Voltage at a specified current. Once the thyristor is activated, it will continue to conduct until the current drops below a certain level. This process is known as latching.

Conclusion

The N0118GA,412 is a silicon controlled rectifier (SCR) that can be used in a variety of ac applications. It is rated for up to 880-volt peak voltages and has a 400-amp peak current rating and 200-amp continuous current rating. The N0118GA,412 is triggered using a control signal and induces latching once activated. This makes this SCR ideal for a wide range of applications, such as welding machines, dimmers, and phase control circuits.