What is the difference between SCR and IGBT?

SCR is a four-layer and three-terminal device whereas IGBT is a four alternating layer three-terminal device. SCR has three PN junctions whereas IGBT has only one PN Junction. IGBT has three terminals named as – Collector(C), Emitter(E), and Gate(G).

Why IGBT is used instead of SCR?

We already know that IGBT process is high input impedance like PMOSFET and has low on-state power loss as in a BJT, but in thyristor (SCRs) are usually chosen so that their break over voltage is so far beyond the greatest voltage expected to be experienced from the power source, so that it can be turned on only by an …

What are SCR used for?

SCRs are mainly used in devices where the control of high power, possibly at high voltage, is needed. The ability to switch large currents on and off makes the SCR suitable for use in medium to high-voltage AC power control applications, such as lamp dimming, regulators and motor control.

Where are IGBT used?

IGBTs are widely used as switching devices in the inverter circuit (for DC-to-AC conversion) for driving small to large motors. IGBTs for inverter applications are used in home appliances such as air conditioners and refrigerators, industrial motors, and automotive main motor controllers to improve their efficiency.

What is the difference between SCR and transistor?

Thyristor is a four-layer device while the transistor is a three-layer device. A thyristor needs only a pulse to make it conducting and thereafter it remains conducting. On the other hand a transistor needs a continuous current for keeping it in a conducting state.

How power is controlled with the help of SCR?

Thyristor, SCR circuits are widely used for power control of both DC and AC systems. The circuits use a variety of different methods to control the load current flow, but all require the gate to be fired and the anode cathode voltage to be removed to stop the current flow.

How IGBT is different to power BJT?

IGBT is driven by the gate voltage whereas BJT is a current-driven device. BJT is made of an emitter, base, and collector three-terminal device whereas IGBT are known as emitter, collector and base. IGBTs are better in power handling to compare to BJT.