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Contents

Power Electronics

Power Devices

Power Diode Thyristor (SCR)SCR Protection SCR Triggering TRIAC and DIAC Power MOSFET IGBT GTO Wide Bandgap Devices

Rectifiers

Uncontrolled Rectifiers Freewheeling Diode Phase Controlled Rectifiers Semi-Converters Three Phase Rectifiers Dual Converters Source Inductance Effect

AC Voltage Controllers

AC Voltage Controllers Cycloconverters Matrix Converters

Choppers

DC-DC Converter Basics Buck Converter Boost Converter Buck-Boost Converter Cuk Converter Chopper Control Strategies Multiphase Choppers

Inverters

Voltage Source Inverters Three Phase Inverters PWM Techniques Space Vector Modulation Current Source Inverters Multilevel Inverters

Switch Mode Power Supplies

Introduction to SMPS Flyback Converter Forward Converter Push-Pull Converter Half and Full Bridge SMPS Resonant Converters

Motor Drives

DC Motor Drives Braking of DC Motors Induction Motor Drives Vector Control BLDC Motor Drives Stepper Motor Drives

Other Topics

HVDC Transmission FACTS Devices UPS Systems Harmonics in Power Systems

Other Subjects

Analog Electronics Digital Electronics Signals & Systems Control Systems Electromagnetic Theory Digital Communication Analog Communication Network Analysis Microprocessors VLSI Design Verilog HDL Embedded Systems DSP Electronic Devices

Section Progress22%

2 of 9 articles

Thyristor (SCR)

Two-transistor analogy, latching/holding current.

Updated: 19 March 2026

10 min read

#Power Electronics

Thyristor SCR Quiz

Test functional understanding of SCR operation and parameters.

Question 1 of 3

Q1.What describes the fundamental condition required to maintain SCR conduction once the gate signal is removed?

Related Articles

Thyristors

SCR structure, regenerative feedback.

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SCR Triggering

R, RC, UJT triggering circuits.

7 min read

TRIAC and DIAC

Bidirectional control, dimmer applications.

5 min read

GTO and TRIAC

Advanced thyristor family members.

12 min read

GTO

Gate Turn-Off thyristor.

12 min read