SCE25C120 Description

SCE25C120 is a high-performance silicon controlled rectifier (SCR) device, an important member of the semiconductor switching element family. Silicon controlled rectifier, also known as thyristor, is a four-layer three-terminal semiconductor device with the characteristics of high efficiency, high reliability and long life.

Main Technical Parameters

  • Package type: TO-263
  • Off-state repetitive peak voltage/Reverse repetitive peak voltage (VDRM/VRRM): 1200V
  • Maximum on-state current (IT(RMS)): 25A
  • Trigger current (IGT): ≤40mA
  • Dv/dt strong anti-interference ability: ≥200V/μs

Working Principle

When the trigger conditions are met, its PNPN structure will conduct to achieve the control of AC load. When the external trigger signal is applied to the gate, the thyristor enters the conduction state from the cut-off state, thereby driving the AC load. Since it is a bidirectional conduction device, it can conduct in both the positive and negative half cycles, which is suitable for AC control applications.

Typical Application

1.AC power control

  • Lighting dimming system
  • Motor speed control
  • Electric heater temperature regulation

2.Switch applications

  • Solid-state relay
  • Power switching circuit
  • Overvoltage protection device

3.Industrial equipment

  • Welding equipment
  • Battery charger
  • Uninterruptible power supply (UPS) system

4.Household appliances

  • Washing machine control
  • Air conditioning system
  • Induction cooker power regulation

Selection Suggestions

  • When selecting SCE25C120, margin design should be performed based on the actual load operating current and voltage
  • It is recommended to use an RC absorption circuit to improve the ability to resist spike interference
  • The drive circuit should consider the gate current supply capability to ensure reliable triggering
  • The heat sink design must meet the thermal management requirements when operating at continuous high current

Summary

SCE25C120 is a cost-effective and stable thyristor device suitable for use in home appliances and industrial control systems that have certain requirements for power control. Its high voltage tolerance and large current output capability make it play an important role in medium and high power control.

Product Line

For datasheet and more details of SCE25C120, please visit the website:

https://en.semiware.com/standard-scr/sce25c120

About Semiware
Semiware has a comprehensive product lineup of circuit protection device products. The company leverages its technology in the semiconductor field and application background in end products to serve customers in the electronics, automotive and industrial markets. For more information, please visit semiware official website: https://en.semiware.com/

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