IKW40N120H3
1200 V / 40 A TrenchStop H3 IGBT with 175 °C junction rating for three-phase inverters, motor drives and UPS.
1200 V / 40 A TrenchStop H3 IGBT with 175 °C junction temperature rating, optimized for three-phase inverters, motor drives and UPS systems with short-circuit ruggedness.
FAE Professional Review
The IKW40N120H3 remains our default recommendation for 1200 V discrete designs in the 7.5 kW to 15 kW range. The H3 die gives a good balance of saturation voltage and switching speed for 8-20 kHz hard-switched inverters, and the 175 °C rating helps shrink the heatsink. Remember to budget for the reverse diode recovery when sizing the freewheeling path.
| Parameter | Value |
|---|---|
| Voltage | 1200 V |
| Current | 40 A |
| Package | TO-247-3 |
| Switching Speed | Fast, up to 20 kHz |
| Temperature | -40 °C to +175 °C |
Application Circuits
Industrial motor drives
Reference circuits and application schematics for Industrial motor drives are available from our FAE team.
Solar inverters
Reference circuits and application schematics for Solar inverters are available from our FAE team.
Uninterruptible power supplies
Reference circuits and application schematics for Uninterruptible power supplies are available from our FAE team.
Need a reference schematic or design review? Our FAE engineers can share verified circuits and layout guidance for this part.
Related Documents
Alternative Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| IGW75N60H3 | TO-247-3 | 600 V alternative where the DC-link voltage allows | View |
Complementary Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| SAK-TC277TP-64F200N | LQFP-64 | Inverter control MCU with PWM generation | View |
| TLE4972-AE35S5 | PG-TDSO-16 | Output phase current sensing | View |
Recommended Complementary Products
Frequently Asked Questions
What is the IKW40N120H3 best used for?
It is a 1200 V / 40 A TrenchStop H3 IGBT aimed at three-phase industrial drives, solar inverters and UPS stages in the 7.5-15 kW class. The 175 °C junction rating lets you shrink the heatsink.
If your DC link stays below 400 V, a 600 V device may be more efficient.
How should I drive the gate and protect the switch?
Use a gate resistor matched to your dv/dt and EMI targets, add desaturation or Vce monitoring for short-circuit protection, and keep the gate loop short. The soft-switching H3 die simplifies drive design.
Our IGBT application note covers gate sizing and dead-time.
What are the practical losses at my switching frequency?
Below about 20 kHz the H3 device balances conduction and switching loss well; above that, switching loss grows quickly. Model both terms at your operating point and DC-link voltage before choosing.
Our FAE team can run a quick loss comparison for you.
How does it compare with the IGW75N60H3?
The IKW40N120H3 handles 1200 V / 40 A for higher DC-link drives, while the IGW75N60H3 delivers 600 V / 75 A for higher-current, lower-voltage stages such as welding and UPS. They differ by voltage class, not quality.
Pick the voltage class your bus requires.
What about thermal design and installation?
Mount the TO-247 device to the heatsink with a thin, uniform thermal interface and verify junction temperature under worst-case load. Respect creepage and clearance for the 1200 V class.
Request a thermal review of your heatsink and derating.
Is the part genuine and what documentation ships with it?
BeiLuo supplies factory-traceable IKW40N120H3 parts with an import declaration, certificate of origin and RoHS file on every order. Stock is normally available and the datasheet downloads here.
Order samples to validate the device before production.