© Innovators

THYRSTO

R

SCR#

Silicon Controlled Rectifier

Construction of Silicon Controlled Rectifier

Static and Dynamic Characteristics of SCR.

What specification/Rating require to select SCR’s

What is Two-Transistor Analogy

Gate Characteristics

How to Trigger the SCR

Protection

What is Turn Off(GTO) Thyristor.

8

2

3

4

5

6

7

9

Learning Objectives

1 What is Silicon Controlled Rectifier

© Innovators

© Innovators

V

I

Forword Leakage Current

I g 0 = 0

Forword Conduction Mode (On State)

Forword BlockingMode (Off State)

Transition State

Forword on state volatage drop

Latching Current

Holding Current

A K

G

A K

G

© Innovators

V

I

Forword Leakage Current

I g 0 = 0

Forword Conduction Mode (On State)

Forword BlockingMode (Off State)

Transition State

Forword on state volatage drop

Latching Current

Holding Current

A K

G

II1 > II0II2 > II1

II3 > II2

© Innovators

V

I

Forword Leakage Current

I g 0 = 0

Forword Conduction Mode (On State)

Forword BlockingMode (Off State)

Transition State

Forword on state volatage drop

Latching Current

Holding Current

A K

G

Reverse BlockingMode (Off State)

VBR

Reverse Leakage Current

 VBO