T7071230B4BY

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Thyristors – SCRs

A thyristor, or a silicon controlled rectifier as otherwise known as, is an electronic semiconductor device consisting of four layers or sections of alternating p-type and n-type silicon. It is a three-terminal device, with a gate and two current-carrying or “anode” terminals. It has the capability to act as an electrical switch, working either in the “on” or the “off” state.

The T7071230B4BY is a 4A 2.5KV thyristor that is specifically designed for high voltage, high current applications. It has a lower junction to case thermal impedance than conventional devices and is suitable for surge operational configurations. Its maximum on-state current is 17A and its vDRM blocking voltage ratings are up to 2.5kV.

Applications

Due to its high blocking voltage rating, the T7071230B4BY is typically used in applications such as motor control, power systems, line protection, and surge protectors. It can be used in combination with other thyristors or thyristor modules for use in AC and DC power applications. As it is suitable for surge operations, it is also used in energy supplies and UPS systems.

Working principle

As previously stated, thyristors work similarly to transistors since they can control electric current through the application of a small negligible current. In the “off-state”, the thyristor has a blocking voltage applied to its reverse direction, meaning no current is able to flow. The thyristor enters an “on-state” when a small gate current is applied, which will allow the device to conduct in the avalanche breakdown region. Also, once the thyristor is “on”, it will maintain the on-state until current is removed, meaning the thyristor acts as a latched switch.

Parameters

When choosing the T7071230B4BY, there are several parameters that need to be taken into consideration. The maximum on-state current, the voltage drop across the thyristor in the on-state, maximum gate control current, gate current turn-on and turn-off times, and surge non-repetitive peak current rating all play an important role in device selection. Also, its capacitance, junction temperature, and series inductance should all be taken into account for proper circuit design. For a more comprehensive list of performance specifications, refer to figures and tables provided by the manufacturer.

Summary

The T7071230B4BY is a 4A 2.5KV thyristor that is specifically designed for high voltage and high current applications. Its maximum on-state current rating is 17A, and its vDRM blocking voltage ratings are up to 2.5kV. It has a lower junction to case thermal impedance than conventional devices and is suitable for surge operational configurations. Typical applications of the device include motor control, power systems, line protection, and surge protectors. The device works somewhat similarly to a transistor, where it is capable of controlling electric current through the application of a small negligible current. When selecting the device, there are several parameters that need to be taken into consideration. After that, the device can be used in combination with other thyristors or thyristor modules for use in AC and DC power applications.

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