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About information presented in this cross reference

The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.

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재고 확인 및 구매

What is the difference between MOSFETs and IGBTs?

Forward characteristic comparison : IGBT vs. MOSFET
Forward characteristic comparison : IGBT vs. MOSFET

There are three major types of transistors: bipolar transistors, MOSFETs, and IGBTs. The following table compares the performance and characteristics of these transistors. Bipolar transistors are now hardly ever used for power electronics and switching applications because of the need for drive and protection circuits and slow switching speed. Instead, MOSFETs and IGBTs are selectively used according to the required characteristics. The figure given alongside shows the on-state voltage characteristics of a 30-A IGBT and a 31-A super-junction MOSFET (SJMOS).

In the low-current region, the MOSFET exhibits a lower on-state voltage than the IGBT. However, in the high-current region, the IGBT exhibits lower on-state voltage than the MOSFET, particularly at high temperature. IGBTs are commonly used at a switching frequency lower than 20 kHz because they exhibit higher switching loss than unipolar MOSFETs.

Comparison of the performance of different types of transistors
Type Bipolar transistors MOSFETs IGBTs
Gate (base) drive

Current drive

(Low input impedance)

Voltage drive

(High input impedance)

Voltage drive

(High input impedance)

Gate (base) drive circuit Complicated for switching applications Relatively simple Relatively simple
On-state voltage characteristics Low VCE(sat)

On-resistance x drain current

Without built-in voltage(*1)

Low VCE(sat)

With built-in voltage(*1)

Switching time

Slow

(Carrier accumulation effect)

Ultra-high speed

(Unipolar device)

High speed

(Faster than bipolar transistors and slower than MOSFETs)

Parasitic diode Not present Present (body diode) Present only in RC-IGBTs

(*1)  The built-in voltage is a threshold voltage inherent to a device. Here, the built-in voltage refers to the forward threshold voltage.