How do I start selecting a MacMic IGBT module?

Begin with the DC bus voltage to fix the voltage class, then set the continuous current from your load. Next choose the series by switching frequency and pick the circuit configuration that matches your topology. Those four decisions narrow the catalog quickly.

HN or 6TC: how do I choose the series?

Choose HN for hard switching up to 50 kHz with low switching energy. Choose the cost-effective 6TC series for motor-drive and general conversion stages at lower frequency. The decision is frequency versus cost.

Can BeiLuo help finalize my module choice?

Yes. Send your voltage, current, switching frequency and topology and we will propose a shortlist with VCE(sat), switching energy, RthJC and stock status, then support design-in. Getting the module right saves project time.

What common selection mistakes should I avoid?

The usual mistakes are oversizing current, ignoring thermal resistance and choosing a package that does not fit the heatsink. Each adds cost or risk without benefit. Validate the choice on the bench before committing the BOM.

How do I size a MacMic FRD module?

Match VRRM to your reverse voltage with margin and IF(AV) to your average current. Then check recovery charge against your switching frequency so the diode does not dominate switching loss. Send your operating point and we will confirm the rating.

Why is soft recovery important?

Soft recovery limits the current snap at turn-off, cutting reverse-recovery loss, overshoot and EMI. In PFC and inverter stages that often removes snubbers and simplifies EMC. It matters most in hard-switched converters.

How do I pair an FRD with an IGBT?

Match the diode's IF(AV) and recovery charge to the IGBT current and frequency so the freewheeling path does not dominate losses. A fast IGBT deserves a fast diode. Our FAE team can recommend a matched pair.

What thermal issues should I watch?

Diodes heat under continuous freewheeling, so verify case temperature at full load and confirm the isolation and mounting torque. The isolated package simplifies shared-heatsink builds. Request a thermal review for your heatsink.

My IGBT module overheats even at light load. Where do I start?

Measure the gate waveform first. If the device is oscillating or partially turned on by noise, losses rise without load. Then check turn-off overshoot and verify the thermal interface and mounting torque. Gate problems often masquerade as thermal problems.

Why is my gate waveform ringing?

Ringing is parasitic oscillation between the gate capacitance and gate-loop inductance. Shorten the gate loop, increase the gate resistance in small steps, or add a ferrite bead close to the package. Keep ringing below about 20% of the drive voltage.

How do I stop false turn-on in a half bridge?

Fast dv/dt couples through Miller capacitance and lifts the off-state gate. Use a negative gate rail, a lower-impedance pull-down, or a lower off-transition gate resistance, and measure the off-state gate during a switching event. If the spike crosses threshold, add the negative rail.

Collector overvoltage at turn-off: what next?

Overvoltage comes from stray loop inductance. Tighten the power loop, then increase the turn-off gate resistor slightly or add a clamp. Measure at the module terminals, not the bus. A layout review often removes the overshoot.

What is the standout feature of MacMic SiC modules?

Fast switching with low loss and a 175 C junction rating, in compact packages. The NCB module keeps loop inductance low, which suits high-frequency EV, charging and photovoltaic converters. The main design care point is gate-loop layout.

How do I drive a SiC module reliably?

Use a stiff driver with a short gate loop and a gate resistance tuned to your EMI target. SiC switches fast enough to ring if the loop is loose, so layout dominates performance. Ask us about gate-drive design.

How should I size cooling for a SiC module?

Use the RDS(on) hot value at your junction temperature to estimate conduction loss, add switching loss, and verify the thermal path from junction to ambient. Do not size cooling from the 25 C RDS(on). Our FAE team can run the loss estimate for you.

Can I get samples to evaluate?

Yes. We provide samples of the 1200 V SiC modules for your own efficiency and thermal testing, with documentation included and FAE support during bring-up. Request a sample and we will confirm stock and lead time.

Technical Support | MacMic Expertise | BeiLuo

Guides, application notes, troubleshooting articles and product reviews from BeiLuo's FAE team covering MacMic IGBT modules, FRD modules and SiC MOSFET modules.

Guides 1 Application Notes 1 Troubleshooting 1 Reviews 1

How to Select a MacMic IGBT Module: HN vs 6TC Guide

2026-07-22 - Guides - By Lei Wang

Compare MacMic HN and 6TC IGBT modules by voltage class, switching frequency and circuit configuration to choose the right module for your design.

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MacMic FRD Module Application Notes for PFC and Freewheeling

2026-07-15 - Application Notes - By Lei Wang

Soft-recovery diode selection, thermal design and layout guidance for MacMic fast recovery diode modules in PFC and inverter stages.

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MacMic IGBT Module Troubleshooting: Gate Drive and Overshoot

2026-07-05 - Troubleshooting - By Jie Sun

Systematic diagnosis of gate-drive oscillation, turn-off overshoot and false turn-on in MacMic IGBT module and discrete designs, with practical fixes.

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