Which one of the following power semi-conductor device has bi-directional current capability?

This question was previously asked in
ESE Electrical 2014 Paper 2: Official Paper
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  1. SCR
  2. MOSFET
  3. IGBT
  4. TRIAC

Answer (Detailed Solution Below)

Option 4 : TRIAC
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ST 1: UPSC ESE (IES) Civil - Building Materials
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Detailed Solution

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Unidirectional devices are the semiconductor devices that allow current to flow only in one direction whereas bidirectional devices allow the flow of current in both the directions.

The unipolar device is a device that the current conduction is due to only holes or electrons whereas in bipolar devices the current conduction is due to both hole and electrons.

Device

Circuit diagram

Current flow

Voltage withstanding capability

SCR

Unidirectional

Bipolar

TRIAC

Bidirectional

Bipolar

GTO

Unidirectional

Bipolar

MOSFET with body diode

Bidirectional

Unipolar

IGBT

Unidirectional

Bipolar

 

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