SINGLE Insulated Gate Bipolar Transistors (IGBT) 2,203

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Part RoHS Manufacturer Polarity or Channel Type Configuration Surface Mount Maximum Power Dissipation (Abs) Maximum Collector Current (IC) Package Body Material Transistor Application Maximum Emitter Current Maximum Rise Time (tr) Maximum VCEsat Terminal Form Package Shape Operating Mode No. of Elements Maximum Fall Time (tf) Maximum Drain Current (Abs) (ID) Nominal Turn Off Time (toff) No. of Terminals Package Style (Meter) Sub-Category Field Effect Transistor Technology Maximum Power Dissipation Ambient Maximum Operating Temperature Transistor Element Material Maximum Collector-Emitter Voltage Maximum Turn On Time (ton) Minimum Operating Temperature Maximum Gate-Emitter Voltage Maximum Turn Off Time (toff) Maximum Gate-Emitter Threshold Voltage Terminal Finish Minimum Intrinsic Stand-off Ratio Maximum Drain Current (ID) Terminal Position JESD-30 Code Moisture Sensitivity Level (MSL) Case Connection Qualification Maximum Intrinsic Stand-off Ratio Minimum Static Inter-Base Resistance Additional Features JEDEC-95 Code JESD-609 Code Maximum Time At Peak Reflow Temperature (s) Peak Reflow Temperature (C) Nominal Turn On Time (ton) Reference Standard

IXGM17N100A

Littelfuse

N-CHANNEL

SINGLE

NO

150 W

34 A

METAL

POWER CONTROL

4 V

PIN/PEG

ROUND

1

1450 ns

2

FLANGE MOUNT

Insulated Gate BIP Transistors

150 W

150 Cel

SILICON

1000 V

20 V

5 V

BOTTOM

O-MBFM-P2

COLLECTOR

Not Qualified

HIGH SPEED

TO-204AE

NOT SPECIFIED

NOT SPECIFIED

300 ns

IXGA12N100

Littelfuse

N-CHANNEL

SINGLE

YES

100 W

20 A

PLASTIC/EPOXY

POWER CONTROL

GULL WING

RECTANGULAR

1

700 ns

900 ns

2

SMALL OUTLINE

Insulated Gate BIP Transistors

150 Cel

SILICON

1000 V

-55 Cel

20 V

5 V

Matte Tin (Sn)

SINGLE

R-PSSO-G2

1

COLLECTOR

Not Qualified

HIGH SPEED

TO-263AB

e3

10

260

100 ns

IXGM25N100

Littelfuse

N-CHANNEL

SINGLE

NO

200 W

50 A

METAL

POWER CONTROL

3.5 V

PIN/PEG

ROUND

1

1670 ns

2

FLANGE MOUNT

Insulated Gate BIP Transistors

200 W

150 Cel

SILICON

1000 V

20 V

5 V

BOTTOM

O-MBFM-P2

COLLECTOR

Not Qualified

TO-204AE

NOT SPECIFIED

NOT SPECIFIED

350 ns

T0840NC17E

Littelfuse

N-CHANNEL

SINGLE

YES

2590 W

840 A

CERAMIC, METAL-SEALED COFIRED

2.65 V

UNSPECIFIED

ROUND

1

2550 ns

3

DISK BUTTON

125 Cel

SILICON

1700 V

-40 Cel

20 V

END

O-CEDB-X3

1100 ns

IXDR30N120

Littelfuse

N-CHANNEL

SINGLE

NO

300 W

50 A

PLASTIC/EPOXY

POWER CONTROL

THROUGH-HOLE

RECTANGULAR

1

570 ns

3

IN-LINE

Insulated Gate BIP Transistors

150 Cel

SILICON

1200 V

20 V

6.5 V

TIN SILVER COPPER

SINGLE

R-PSIP-T3

ISOLATED

Not Qualified

HIGH SPEED SWITCHING, LOW SWITCHING LOSS, FAST RECOVERY

e1

170 ns

T0900AF65E

Littelfuse

N-CHANNEL

SINGLE

YES

10600 W

900 A

CERAMIC, METAL-SEALED COFIRED

5.2 V

UNSPECIFIED

ROUND

1

6600 ns

3

DISK BUTTON

125 Cel

SILICON

6500 V

-40 Cel

20 V

END

O-CEDB-X3

4600 ns

IXYN140N120A4

Littelfuse

N-CHANNEL

SINGLE

NO

1070 W

380 A

PLASTIC/EPOXY

POWER CONTROL

1.7 V

UNSPECIFIED

RECTANGULAR

1

1240 ns

4

FLANGE MOUNT

175 Cel

SILICON

1200 V

-55 Cel

20 V

6.5 V

UPPER

R-PUFM-X4

ISOLATED

LOW CONDUCTION LOSS

86 ns

UL RECOGNIZED

T0385HF65E

Littelfuse

N-CHANNEL

SINGLE

YES

4600 W

385 A

CERAMIC, METAL-SEALED COFIRED

5.2 V

UNSPECIFIED

ROUND

1

6800 ns

3

DISK BUTTON

125 Cel

SILICON

6500 V

-40 Cel

20 V

END

O-CEDB-X3

4900 ns

T1440VC17E

Littelfuse

N-CHANNEL

SINGLE

YES

4400 W

1440 A

CERAMIC, METAL-SEALED COFIRED

2.65 V

UNSPECIFIED

ROUND

1

3000 ns

3

DISK BUTTON

125 Cel

SILICON

1700 V

-40 Cel

20 V

END

O-CEDB-X3

1350 ns

T1375DF65E

Littelfuse

N-CHANNEL

SINGLE

YES

16000 W

1375 A

CERAMIC, METAL-SEALED COFIRED

5.2 V

UNSPECIFIED

ROUND

1

6400 ns

3

DISK BUTTON

125 Cel

SILICON

6500 V

-40 Cel

20 V

END

O-CEDB-X3

4500 ns

T1000TC33E

Littelfuse

N-CHANNEL

SINGLE

YES

6400 W

1000 A

CERAMIC, METAL-SEALED COFIRED

2.97 V

UNSPECIFIED

ROUND

1

6800 ns

3

DISK BUTTON

125 Cel

SILICON

3300 V

-40 Cel

20 V

END

O-CEDB-X3

3500 ns

IXGH64N60B3

Littelfuse

N-CHANNEL

SINGLE

NO

460 W

64 A

PLASTIC/EPOXY

POWER CONTROL

1.8 V

THROUGH-HOLE

RECTANGULAR

1

150 ns

226 ns

3

FLANGE MOUNT

150 Cel

SILICON

600 V

-55 Cel

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

LOW CONDUCTION LOSS

TO-247AD

e3

10

260

66 ns

IXYH100N65A3

Littelfuse

N-CHANNEL

SINGLE

NO

470 W

240 A

PLASTIC/EPOXY

POWER CONTROL

1.8 V

THROUGH-HOLE

RECTANGULAR

1

459 ns

3

FLANGE MOUNT

175 Cel

SILICON

650 V

-55 Cel

20 V

6 V

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

87 ns

IXGH120N30C3

Littelfuse

N-CHANNEL

SINGLE

NO

540 W

75 A

PLASTIC/EPOXY

POWER CONTROL

1.7 V

THROUGH-HOLE

RECTANGULAR

1

195 ns

3

FLANGE MOUNT

150 Cel

SILICON

300 V

-55 Cel

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

65 ns

IXGT28N120B

Littelfuse

N-CHANNEL

SINGLE

YES

250 W

50 A

PLASTIC/EPOXY

POWER CONTROL

GULL WING

RECTANGULAR

1

320 ns

590 ns

2

SMALL OUTLINE

Insulated Gate BIP Transistors

150 Cel

SILICON

1200 V

20 V

5 V

MATTE TIN

SINGLE

R-PSSO-G2

1

COLLECTOR

Not Qualified

TO-268AA

e3

10

260

63 ns

IXGH12N120A3

Littelfuse

N-CHANNEL

SINGLE

NO

100 W

22 A

PLASTIC/EPOXY

POWER CONTROL

3 V

THROUGH-HOLE

RECTANGULAR

1

1545 ns

3

FLANGE MOUNT

150 Cel

SILICON

1200 V

-55 Cel

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

LOW CONDUCTION LOSS

TO-247AD

e3

10

260

202 ns

IXGH20N30

Littelfuse

N-CHANNEL

SINGLE

NO

200 W

40 A

PLASTIC/EPOXY

MOTOR CONTROL

THROUGH-HOLE

RECTANGULAR

1

450 ns

250 ns

3

FLANGE MOUNT

Insulated Gate BIP Transistors

150 Cel

SILICON

300 V

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

FAST

TO-247AD

e3

10

260

15 ns

IXGH40N120A2

Littelfuse

N-CHANNEL

SINGLE

NO

360 W

75 A

PLASTIC/EPOXY

POWER CONTROL

2 V

THROUGH-HOLE

RECTANGULAR

1

1200 ns

1220 ns

3

FLANGE MOUNT

150 Cel

SILICON

1200 V

-55 Cel

20 V

2000 ns

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

63 ns

IXXH30N60B3

Littelfuse

N-CHANNEL

SINGLE

NO

270 W

60 A

PLASTIC/EPOXY

POWER CONTROL

1.85 V

THROUGH-HOLE

RECTANGULAR

1

292 ns

3

FLANGE MOUNT

175 Cel

SILICON

600 V

-55 Cel

20 V

6 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

57 ns

IXGT15N120C

Littelfuse

N-CHANNEL

SINGLE

YES

150 W

30 A

PLASTIC/EPOXY

POWER CONTROL

GULL WING

RECTANGULAR

1

190 ns

470 ns

2

SMALL OUTLINE

Insulated Gate BIP Transistors

150 Cel

SILICON

1200 V

20 V

5 V

TIN LEAD

SINGLE

R-PSSO-G2

COLLECTOR

Not Qualified

LOW SWITCHING LOSSES

TO-268AA

e0

43 ns

IXGT32N120A3

Littelfuse

N-CHANNEL

SINGLE

YES

300 W

75 A

PLASTIC/EPOXY

POWER CONTROL

2.35 V

GULL WING

RECTANGULAR

1

1380 ns

2

SMALL OUTLINE

150 Cel

SILICON

1200 V

-55 Cel

20 V

5 V

MATTE TIN

SINGLE

R-PSSO-G2

1

COLLECTOR

LOW CONDUCTION LOSS

TO-268AA

e3

10

260

239 ns

IXGT72N60B3

Littelfuse

N-CHANNEL

SINGLE

YES

540 W

75 A

PLASTIC/EPOXY

POWER CONTROL

1.8 V

GULL WING

RECTANGULAR

1

160 ns

240 ns

2

SMALL OUTLINE

150 Cel

SILICON

600 V

-55 Cel

20 V

490 ns

5 V

MATTE TIN

SINGLE

R-PSSO-G2

1

COLLECTOR

LOW CONDUCTION LOSS

TO-268AA

e3

10

260

64 ns

IXGT40N60C

Littelfuse

N-CHANNEL

SINGLE

YES

250 W

75 A

PLASTIC/EPOXY

MOTOR CONTROL

GULL WING

RECTANGULAR

1

155 ns

2

SMALL OUTLINE

Insulated Gate BIP Transistors

150 Cel

SILICON

600 V

20 V

5 V

MATTE TIN

SINGLE

R-PSSO-G2

1

COLLECTOR

Not Qualified

TO-268AA

e3

10

260

60 ns

IXGH48N60C3

Littelfuse

N-CHANNEL

SINGLE

NO

300 W

75 A

PLASTIC/EPOXY

POWER CONTROL

2.5 V

THROUGH-HOLE

RECTANGULAR

1

187 ns

3

FLANGE MOUNT

150 Cel

SILICON

600 V

-55 Cel

20 V

5.5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

45 ns

IXGH50N50B

Littelfuse

N-CHANNEL

SINGLE

NO

250 W

75 A

PLASTIC/EPOXY

MOTOR CONTROL

THROUGH-HOLE

RECTANGULAR

1

150 ns

280 ns

3

FLANGE MOUNT

Insulated Gate BIP Transistors

150 Cel

SILICON

500 V

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

FAST

TO-247AD

e3

10

260

50 ns

IXGH50N90B2

Littelfuse

N-CHANNEL

SINGLE

NO

400 W

75 A

PLASTIC/EPOXY

POWER CONTROL

2.7 V

THROUGH-HOLE

RECTANGULAR

1

820 ns

3

FLANGE MOUNT

150 Cel

SILICON

900 V

-55 Cel

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

48 ns

IXGH30N120B3

Littelfuse

N-CHANNEL

SINGLE

NO

300 W

60 A

PLASTIC/EPOXY

POWER CONTROL

3.5 V

THROUGH-HOLE

RECTANGULAR

1

380 ns

331 ns

3

FLANGE MOUNT

150 Cel

SILICON

1200 V

-55 Cel

20 V

580 ns

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

LOW CONDUCTION LOSS

TO-247AD

e3

10

260

53 ns

IXGH12N90C

Littelfuse

N-CHANNEL

SINGLE

NO

100 W

24 A

PLASTIC/EPOXY

MOTOR CONTROL

THROUGH-HOLE

RECTANGULAR

1

180 ns

350 ns

3

FLANGE MOUNT

Insulated Gate BIP Transistors

150 Cel

SILICON

900 V

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

FAST

TO-247AD

e3

10

260

40 ns

IXGT24N60B

Littelfuse

N-CHANNEL

SINGLE

YES

48 A

PLASTIC/EPOXY

POWER CONTROL

GULL WING

RECTANGULAR

1

2

SMALL OUTLINE

SILICON

600 V

PURE TIN

SINGLE

R-PSSO-G2

Not Qualified

TO-268AA

IXXH140N65B4

Littelfuse

N-CHANNEL

SINGLE

NO

1200 W

340 A

PLASTIC/EPOXY

POWER CONTROL

1.9 V

THROUGH-HOLE

RECTANGULAR

1

340 ns

3

FLANGE MOUNT

175 Cel

SILICON

650 V

-55 Cel

20 V

6.5 V

SINGLE

R-PSFM-T3

COLLECTOR

TO-247

128 ns

IXBF9N140

Littelfuse

N-CHANNEL

SINGLE

NO

70 W

7 A

PLASTIC/EPOXY

POWER CONTROL

THROUGH-HOLE

RECTANGULAR

1

220 ns

3

IN-LINE

Insulated Gate BIP Transistors

150 Cel

SILICON

1400 V

20 V

8 V

TIN SILVER COPPER

SINGLE

R-PSIP-T3

ISOLATED

Not Qualified

HIGH RELIABILITY

e1

260 ns

IXYH40N120B4

Littelfuse

N-CHANNEL

SINGLE

NO

680 W

136 A

PLASTIC/EPOXY

POWER CONTROL

2.1 V

THROUGH-HOLE

RECTANGULAR

1

490 ns

3

FLANGE MOUNT

175 Cel

SILICON

1200 V

-55 Cel

20 V

6.5 V

SINGLE

R-PSFM-T3

COLLECTOR

TO-247

63 ns

IXGT25N160

Littelfuse

N-CHANNEL

SINGLE

YES

75 A

PLASTIC/EPOXY

GULL WING

RECTANGULAR

1

526 ns

2

SMALL OUTLINE

150 Cel

SILICON

1600 V

MATTE TIN

SINGLE

R-PSSO-G2

1

COLLECTOR

Not Qualified

TO-268AA

e3

10

260

283 ns

IXYH40N120A4

Littelfuse

N-CHANNEL

SINGLE

NO

600 W

140 A

PLASTIC/EPOXY

POWER CONTROL

1.8 V

THROUGH-HOLE

RECTANGULAR

1

1040 ns

3

FLANGE MOUNT

175 Cel

SILICON

1200 V

-55 Cel

20 V

6.5 V

SINGLE

R-PSFM-T3

COLLECTOR

TO-247

67 ns

IXYH24N90C3

Littelfuse

N-CHANNEL

SINGLE

NO

240 W

46 A

PLASTIC/EPOXY

POWER CONTROL

3 V

THROUGH-HOLE

RECTANGULAR

1

215 ns

3

FLANGE MOUNT

175 Cel

SILICON

900 V

-55 Cel

20 V

6 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247

e3

10

260

60 ns

IXYH30N120C4

Littelfuse

N-CHANNEL

SINGLE

NO

500 W

94 A

PLASTIC/EPOXY

POWER CONTROL

2.4 V

THROUGH-HOLE

RECTANGULAR

1

360 ns

3

FLANGE MOUNT

175 Cel

SILICON

1200 V

-55 Cel

20 V

6.5 V

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

56 ns

IXGH56N60A3

Littelfuse

N-CHANNEL

SINGLE

NO

330 W

150 A

PLASTIC/EPOXY

POWER CONTROL

1.35 V

THROUGH-HOLE

RECTANGULAR

1

550 ns

625 ns

3

FLANGE MOUNT

150 Cel

SILICON

600 V

-55 Cel

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

LOW CONDUCTION LOSS

TO-247AD

e3

10

260

68 ns

IXGH20N120B

Littelfuse

N-CHANNEL

SINGLE

NO

40 A

PLASTIC/EPOXY

POWER CONTROL

THROUGH-HOLE

RECTANGULAR

1

630 ns

3

FLANGE MOUNT

150 Cel

SILICON

1200 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

TO-247AD

e3

43 ns

IXGH50N120C3

Littelfuse

N-CHANNEL

SINGLE

NO

460 W

75 A

PLASTIC/EPOXY

POWER CONTROL

4.2 V

THROUGH-HOLE

RECTANGULAR

1

485 ns

3

FLANGE MOUNT

150 Cel

SILICON

1200 V

-55 Cel

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

55 ns

IXGH30N60C3

Littelfuse

N-CHANNEL

SINGLE

NO

220 W

60 A

PLASTIC/EPOXY

POWER CONTROL

3 V

THROUGH-HOLE

RECTANGULAR

1

160 ns

3

FLANGE MOUNT

150 Cel

SILICON

600 V

-55 Cel

20 V

5.5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

45 ns

IXYH20N65C3

Littelfuse

N-CHANNEL

SINGLE

NO

230 W

50 A

PLASTIC/EPOXY

POWER CONTROL

2.5 V

THROUGH-HOLE

RECTANGULAR

1

132 ns

3

FLANGE MOUNT

175 Cel

SILICON

650 V

-55 Cel

20 V

6 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

51 ns

IXGH48N60B3

Littelfuse

N-CHANNEL

SINGLE

NO

300 W

48 A

PLASTIC/EPOXY

POWER CONTROL

1.8 V

THROUGH-HOLE

RECTANGULAR

1

200 ns

246 ns

3

FLANGE MOUNT

150 Cel

SILICON

600 V

-55 Cel

20 V

400 ns

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

LOW CONDUCTION LOSS

TO-247AD

e3

10

260

47 ns

IXGH36N60A3

Littelfuse

N-CHANNEL

SINGLE

NO

220 W

96 A

PLASTIC/EPOXY

POWER CONTROL

1.4 V

THROUGH-HOLE

RECTANGULAR

1

1000 ns

3

FLANGE MOUNT

150 Cel

SILICON

600 V

-55 Cel

20 V

5.5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

LOW CONDUCTION LOSS

TO-247AD

e3

10

260

43 ns

IXGH40N30A

Littelfuse

N-CHANNEL

SINGLE

NO

200 W

60 A

PLASTIC/EPOXY

MOTOR CONTROL

THROUGH-HOLE

RECTANGULAR

1

120 ns

370 ns

3

FLANGE MOUNT

Insulated Gate BIP Transistors

150 Cel

SILICON

300 V

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

FAST

TO-247AD

e3

10

260

65 ns

IXXH30N60C3

Littelfuse

N-CHANNEL

SINGLE

NO

270 W

60 A

PLASTIC/EPOXY

POWER CONTROL

2.4 V

THROUGH-HOLE

RECTANGULAR

1

166 ns

3

FLANGE MOUNT

175 Cel

SILICON

600 V

-55 Cel

20 V

6 V

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

57 ns

IXGT50N60C2

Littelfuse

N-CHANNEL

SINGLE

YES

75 A

PLASTIC/EPOXY

MOTOR CONTROL

GULL WING

RECTANGULAR

1

230 ns

2

SMALL OUTLINE

150 Cel

SILICON

600 V

MATTE TIN

SINGLE

R-PSSO-G2

1

COLLECTOR

Not Qualified

TO-268AA

e3

10

260

43 ns

IXXH40N65B4

Littelfuse

N-CHANNEL

SINGLE

NO

455 W

115 A

PLASTIC/EPOXY

POWER CONTROL

2 V

THROUGH-HOLE

RECTANGULAR

1

252 ns

3

FLANGE MOUNT

175 Cel

SILICON

650 V

-55 Cel

20 V

6.5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

TO-247AD

e3

10

260

67 ns

IXGH40N30

Littelfuse

N-CHANNEL

SINGLE

NO

200 W

60 A

PLASTIC/EPOXY

MOTOR CONTROL

THROUGH-HOLE

RECTANGULAR

1

220 ns

600 ns

3

FLANGE MOUNT

Insulated Gate BIP Transistors

150 Cel

SILICON

300 V

20 V

5 V

MATTE TIN

SINGLE

R-PSFM-T3

COLLECTOR

Not Qualified

FAST

TO-247AD

e3

10

260

65 ns

Insulated Gate Bipolar Transistors (IGBT)

Insulated Gate Bipolar Transistors (IGBT) are electronic devices used in power electronics to control and switch high voltage and high current levels. They are commonly used in applications such as motor drives, power supplies, and welding equipment.

The IGBT is a three-terminal device that combines the high-speed switching capability of a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) with the low conduction losses of a bipolar transistor. The IGBT consists of a p-type and n-type semiconductor material, which are sandwiched between two electrodes, and an insulated gate electrode.

The IGBT is operated by applying a voltage to the gate electrode, which creates a conductive channel between the p-type and n-type material, allowing current to flow through the device. The IGBT is turned off by reducing the gate voltage, which reduces the conductivity of the channel and stops the flow of current.

IGBTs are designed to handle high voltage and high current levels, and have a low on-resistance and high switching speed. They are typically used in applications that require efficient and precise control of power, such as motor drives and power supplies.

IGBTs are subject to various standards and regulations, such as UL (Underwriters Laboratories) and CE (Conformité Européenne), to ensure their safety and performance. Proper selection and use of IGBTs are critical to ensure reliable and efficient operation of power electronics systems. IGBTs are often used in conjunction with other components, such as diodes and capacitors, to form complete power electronics circuits.