MM40G3U65BN
650 V / 40 A MacMic G3U high-speed discrete IGBT in TO-247 for welding, induction and inverters above 15 kHz.
The MM40G3U65BN is a 650 V / 40 A MacMic discrete IGBT in the TO-247 package, from the high-speed G3U series built on a self-developed low-VCE Trench Field-Stop chip. With a typical saturation voltage of 1.75 V, 230 W power dissipation and 0.65 K/W junction-to-case thermal resistance, it is tuned for switching above 15 kHz in welding machines, induction cookers and inverters. The G3U series delivers fast switching with good short-circuit capability, and the standard TO-247 footprint mounts to common heatsinks and existing layouts. Unlike a module, a discrete gives full freedom in circuit topology and lets you optimize the freewheeling path independently. Every device is factory-traceable and ships with import declaration, certificate of origin and RoHS documentation. Designers should size the gate resistor and dead time for the high switching speed, and confirm the heatsink against the 0.65 K/W thermal path for continuous operation. The device ships with import, origin and RoHS documentation, and BeiLuo supports sample orders so you can validate switching and thermal behavior on the bench.
FAE Professional Review
The MM40G3U65BN is a high-speed workhorse for 650 V designs above 15 kHz. The 1.75 V VCE(sat) keeps conduction loss in check, and the fast switching suits welding and induction loads. Keep the gate loop short to control overshoot.
| Parameter | Value |
|---|---|
| VCES (V) | 650 V |
| IC (A) | 40 A |
| VCE(sat) (V) | 1.75 V |
| Series | G3U |
| Package | TO-247 |
Application Circuits
Welding machines
Reference circuits and application schematics for Welding machines are available from our FAE team.
Induction cookers
Reference circuits and application schematics for Induction cookers are available from our FAE team.
Inverters
Reference circuits and application schematics for Inverters 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 |
|---|---|---|---|
| MM50G3T120BM | TO-247 Plus | Higher-voltage TO-247 Plus alternative for 1200 V buses | View |
Complementary Part Numbers
| Model | Package | Note | Action |
|---|---|---|---|
| MMF200S120DK | Non-isolated | Fast recovery diode for the freewheeling path | View |
| MMG100J120UZ | GJ-UZ | IGBT module for the main power stage | View |
Recommended Complementary Products
Frequently Asked Questions
What switching speed does the G3U series target?
G3U is designed for switching above 15 kHz, such as welding machines and induction heating. For slower motor-drive or conversion circuits below 15 kHz, the G3T series is the better match.
Match the series to your frequency.
How do I drive this discrete for reliable switching?
Start from the datasheet gate resistor, keep the gate loop short, and verify turn-off overvoltage at the device terminals. A negative gate supply improves off-state robustness in half-bridge use.
Our application note covers gate selection.
What thermal design is needed at 40 A?
Use the 0.65 K/W RthJC plus interface and heatsink resistance, and verify junction temperature at continuous current. The TO-247 mounts with a standard clip or screw.
Request a thermal review for your heatsink.
Is the device genuine and in stock?
BeiLuo supplies factory-traceable MM40G3U65BN devices with import, origin and RoHS documents. Stock is normally available and the datasheet downloads here.
Request a sample for validation.