Comparison of SCR, Power BJT, Power MOSFET, IGBT

Comparison of SCR, Power BJT, Power MOSFET, IGBT

In this article, we will discuss about compression of different Power Electronics Switches like; SCR (Silicon Controlled Rectifier), Power BJT (Bipolar Junction Transistor), Power MOSFET (Metal Oxide Semiconductor Field Effect Transistor), and IGBT (Insulated Gate Bipolar Transistor).

Comparison of SCR, Power BJT, Power MOSFET, IGBT

Sr No

Parameter SCR Power BJT Power MOSFET

IGBT

1 Operating frequency 400 to 500 Hz 10 kHz 100 kHz 10 kHz
2 On-state voltage drop < 2 volts <2 volts 4-5 volts 3 volts
3 Trigger circuit Current controlled need single pulse to turn-on. Current controlled needs continuous base drive. Voltage controlled needs continuous gate drive. Voltage controlled need continuous gate drive.
4 Snubber Necessary (unpolarized) Necessary (polarized) Snubber can be eliminated. If used a polarized snubber is used. Snubber can be eliminated. If used a polarized snubber is used.
5 Applications DC motor drives, inverters, rectifiers. UPS, SMPS, Static VAR systems, AC motor control, AC motor control, SMPS SMPS, BLDC drives AC motor control UPS.
6 Maximum VI Rating 10 kV/ 5000 A 2 kV/ 1000 A 600 V/ 200 A 1500 V/ 400 A
7 Type of Device Minority carrier Minority carrier Majority carrier Minority carrier
8 Voltage or Current Controlled Current controlled Current controlled Voltage controlled Voltage controlled
9 Communication Circuit Necessary Not Necessary Not Necessary Not Necessary
10 Blocking Capacity Symmetrical Asymmetrical Asymmetrical Asymmetrical
11 Temperature Coefficient Negative Negative Positive Flat
12 Thermal Runaway Possible Possible Not Possible Not Possible
13 Parallel Operation External equalizing circuit is necessary. Equalizing circuit required. Easy to parallel. Easy to parallel.
14 Symbol

SCR Symbol
SCR Symbol

Power BJT
Power BJT Symbol

Power MOSFET
Power MOSFET Symbol

Symbol of IGBT
Symbol of IGBT

 

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