How do I start selecting an NCE Power device?

Fix the voltage class from your DC bus, size the current for the worst-case load, then choose between a low-voltage SGT MOSFET, a high-voltage Super Junction MOSFET and a Trench FS IGBT. Finally pick the on-resistance or saturation voltage and the package. Those decisions narrow the catalog quickly.

SGT MOSFET, Super Junction MOSFET or IGBT?

Choose an SGT MOSFET for low-voltage, high-current switching such as DC-DC and synchronous rectification. Choose a Super Junction MOSFET for high-voltage, high-frequency offline conversion. Choose a Trench FS IGBT for high-voltage, high-current switching at moderate frequency. The decision follows from the voltage and the frequency.

Can BeiLuo help finalize my device choice?

Yes. Send your voltage, current, switching frequency and topology and we will propose a shortlist with loss, thermal resistance and stock status, then support design-in. Getting the device right saves project time.

What selection mistakes should I avoid?

The usual mistakes are sizing cooling from the 25 C on-resistance, ignoring the gate-loop layout and choosing a package that does not fit the PCB. Each adds cost or risk without benefit. Validate the choice on the bench before committing the BOM.

How do I drive an NCE Power IGBT?

An IGBT has a MOS gate, so it is driven with a voltage like a MOSFET, but the gate resistor and dead time must be set for the switching speed. The 1 to 60 kHz frequency range of the TD family covers most offline converters. Keep the gate loop short and verify turn-off overshoot at the device terminals.

How do I set the dead time?

Dead time must be long enough to prevent cross-conduction in a half bridge but short enough to avoid output distortion. Verify it on the bench with a current probe on the phase output, and account for the gate-drive propagation delay and the freewheeling diode's recovery. Our FAE team can review your gate-drive design.

What is the short-circuit withstand for?

The 5 microsecond short-circuit withstand lets the device survive a fault long enough for the controller to detect it and turn off, which protects the IGBT and the equipment. Keep current density within the rating and respect the withstand time. Request a protection review from our FAE team.

How do I handle the freewheeling path?

For an IGBT bridge, a matched fast recovery diode handles the freewheeling current and its recovery charge must suit the switching frequency. Match the diode current to the IGBT current and confirm the thermal design. Get a matched IGBT and diode pairing.

My MOSFET fails at power-up. Where do I start?

Check the inrush and the gate drive first, then the thermal path and the layout. A power-up failure is often an avalanche event from a load dump, or a gate-drive problem, rather than a steady-state overload. Measure the drain voltage and the gate waveform during start-up.

Why is my MOSFET running hot?

Conduction loss scales with the on-resistance times current squared, and on-resistance rises with temperature. Check the current, the on-resistance hot value, and the interface and heatsink. A thick or uneven interface is a frequent culprit, and a surface-mount device needs good PCB copper. Use a thin, uniform interface and verify case temperature under load.

How do I stop gate 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 percent of the drive voltage. Our FAE team can review your gate-drive design.

The MOSFET avalanche rating: how do I use it?

The SGT family is 100 percent avalanche tested, so it tolerates a limited energy dump from an inductive load. Keep the drain-source voltage and the avalanche energy within the datasheet limits, and tighten the layout to reduce the overshoot that triggers the event. Request a layout review from our FAE team.

What is the standout feature of NCE Power Super Junction MOSFETs?

The charge-balance structure gives a low on-resistance at high voltage, and the SJ-III TF series enhances the body-diode recovery to reduce recovery loss in full-bridge, half-bridge and LLC converters. The small gate charge keeps the drive light. The main design care point is the commutation loop.

Why does body-diode recovery matter?

In an LLC or bridge converter the body diode conducts during the dead time, and its recovery affects loss and EMI. The SJ-III TF series enhances the body-diode recovery so it produces less loss and less ringing, which improves efficiency and simplifies EMC. It matters most in hard-switched bridge stages.

Which package should I choose?

Choose a TO-247 or TO-220 for a high-power stage that mounts on a heatsink, and a TO-252 or TO-263 for a compact stage where the PCB provides the thermal path. Package choice follows the power and the cooling, not convenience. Our FAE team can compare packages for your design.

Can I get samples to evaluate?

Yes. We provide samples of the Super Junction MOSFETs 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 | NCE Power Expertise | BeiLuo

Guides, application notes, troubleshooting and reviews from BeiLuo's FAE team covering NCE Power SGT MOSFETs, Super Junction MOSFETs and Trench FS IGBTs.

Guides 1 Application Notes 1 Troubleshooting 1 Reviews 1

How to Select an NCE Power MOSFET or IGBT

2026-07-29 - Guides - By Wei Zhang

Compare NCE Power SGT MOSFETs, Super Junction MOSFETs and Trench FS IGBTs by voltage class, current, on-resistance and package to choose the right device.

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NCE Power IGBT Application Notes: Gate Drive and Thermal Design

2026-07-22 - Application Notes - By Wei Zhang

Gate-drive and thermal guidance for designing PFC, supplies and drives around NCE Power Trench Field-Stop IGBTs, including dead time and layout practice.

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Troubleshooting NCE Power MOSFETs in Switching Supplies

2026-07-11 - Troubleshooting - By Li Chen

A systematic method for diagnosing avalanche, gate-drive, thermal and layout problems in NCE Power SGT and Super Junction MOSFETs inside switching supplies.

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NCE Power Super Junction MOSFETs: A Practical Review

2026-06-30 - Reviews - By Hao Wang

A hands-on review of NCE Power Super Junction MOSFETs for PFC and offline supplies, covering on-resistance, body-diode recovery and practical package practice.

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Meet Our FAE Team

Wei Zhang

Senior FAE Engineer, Power Devices

Power MOSFETIGBTGate Drive

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Li Chen

FAE Engineer, Switching Supplies

Power MOSFETPFCEMC

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Hao Wang

FAE Engineer, Applications

Super JunctionEfficiencyThermal

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