How do I start selecting a Fuji Electric power module?

Fix the voltage class from your DC bus, size the current for the worst-case load, then choose between an IGBT module and an IPM. Finally pick 2-pack, 6-pack or IPM depending on how much of the power stage you want integrated. Those four decisions narrow the catalog quickly.

IGBT module or IPM: which should I choose?

Choose an IPM when you want the gate drive and protection integrated and the board kept simple, which suits compact and high-volume drives. Choose a discrete IGBT module when you need higher current, more circuit flexibility or a custom gate drive. The decision is integration versus flexibility.

Can BeiLuo help finalize my module 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 module right saves project time.

What selection mistakes should I avoid?

The usual mistakes are oversizing current, ignoring the thermal path 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 set the overcurrent trip level on a Fuji IPM?

The module contains the comparator, but you select the external current-sense resistor that sets the trip current. Size it so the trip level sits above the motor peak current with margin but below the module's safe limit. Verify the level with a clamped current probe during bring-up.

What control supply does a Fuji IPM need?

A Fuji Electric IPM uses a single 15 V control supply and accepts a 3.3 V or 5 V input signal, so it connects directly to common microcontrollers. Keep the control supply clean and place its decoupling close to the module. The undervoltage-lockout threshold protects the module if the supply sags.

How do I design the brake chopper for my drive?

Choose a brake-chopper version, then size the brake resistor from the regenerative energy per stop and the chopper duty cycle. Repeated fast stops need a larger resistor and a higher power rating than an occasional emergency stop. Our FAE team can review your brake design.

How should I lay out the IPM on the board?

Keep the DC-link capacitor close to the module power terminals, use short sense-resistor connections and keep the high-current loop away from the low-level control signals. The integrated drive makes the board simpler but layout still affects EMI. Request a layout review from our FAE team.

My Fuji IPM trips on overcurrent at startup. Where do I start?

Check the current-sense resistor and the trip level first, then look for a short in the motor or wiring and for a gate-drive or dead-time problem that causes shoot-through. A trip at startup is usually a level or wiring issue rather than a thermal one. Measure the phase current with a clamped probe during the trip.

The module reports a fault but the load is light. Why?

A fault at light load often points to noise on the control supply, a marginal sense-resistor value or a poor thermal interface. Check the 15 V supply for ripple, verify the trip level and confirm the module is mounted flat with a thin interface. Noise and mounting problems look like device faults.

How do I clear a latched fault correctly?

Read the alarm type, remove the cause, then clear the fault and re-enable the drive only when the load is safe. Do not auto-restart quickly, because a persistent fault will trip again and may damage the hardware. Log the alarm type to speed future diagnosis.

The module gets hot before it trips. Is that normal?

The overtemperature protection is a last line of defence, not a normal operating condition. If case temperature is high at rated load, improve the heatsink and interface so the protection stays in reserve. Request a thermal review for your design.

What is the standout feature of the Fuji X series IGBT module?

The 7th-generation X series chip reduces inverter loss by about ten percent and lowers chip temperature against the previous generation, while supporting a 175 C operating temperature. The package keeps inductance low, which makes overshoot predictable. The main design care point is the commutation loop.

Does the X series need a different gate drive?

No. The X series uses a conventional gate drive, so familiar gate-resistor and dead-time rules apply. Its lower loss and lower chip temperature simply give you more thermal margin or allow a higher switching frequency. Confirm the gate resistor for your EMI target as usual.

Which package should I choose?

Choose a 2-pack for per-leg flexibility and a 6-pack for an integrated three-phase bridge. Package choice affects loop inductance, thermal path and assembly, so it should follow the power and mechanical requirements rather than convenience. Our FAE team can compare packages for your design.

Can I get samples to evaluate?

Yes. We provide samples of the X series IGBT 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 | Fuji Electric Expertise | BeiLuo

Guides, application notes, troubleshooting articles and reviews from BeiLuo's FAE team covering Fuji Electric IGBT modules and IPM intelligent power modules.

Guides 1 Application Notes 1 Troubleshooting 1 Reviews 1

How to Select a Fuji Electric IGBT Module or IPM

2026-07-23 - Guides - By Kenji Sato

Compare Fuji Electric 2-pack and 6-pack IGBT modules and IPM intelligent power modules by voltage class, current and circuit topology to choose the right part for your drive.

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Fuji Electric IPM Application Notes: Protection and Brake Chopper

2026-07-16 - Application Notes - By Kenji Sato

Control supply, sense-resistor, protection threshold and brake-chopper guidance for designing compact drives around Fuji Electric IPM intelligent power modules.

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Troubleshooting Fuji Electric IPM Fault Outputs and Gate Drive

2026-07-06 - Troubleshooting - By Yuki Mori

A systematic method for diagnosing Fuji Electric IPM alarm faults, overcurrent trips, undervoltage and overtemperature events, with practical fixes for each.

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Fuji Electric 7th-Generation X Series IGBT Modules: A Practical Review

2026-06-29 - Reviews - By Akira Ito

A hands-on review of Fuji Electric X series IGBT modules for inverters and power conversion, covering loss reduction, thermal behavior, packaging and layout practice.

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Meet Our FAE Team

Kenji Sato

Senior FAE Engineer, Power Modules

IGBT ModulesIPMThermal Design

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Yuki Mori

FAE Engineer, IPM and Protection

IPMGate DriveProtection

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Akira Ito

FAE Engineer, Applications

X Series IGBTMotor DriveEMC

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