Power comparison
MOSFET vs. IGBT: Power-Switching Selection
Reviewed by Enzo Parilli · Updated 2026-08-02 · Editorial policy
Direct answer
When should a designer choose a MOSFET or an IGBT?
MOSFETs and IGBTs have different voltage, switching-frequency, conduction, gate-drive, and thermal trade-offs. Selection should be made from the actual operating envelope and package rather than a generic power-device label.
At-a-glance comparison
| Dimension | Option A | Option B |
|---|---|---|
| Primary trade-off | Fast switching and voltage-dependent conduction | High-voltage switching with VCE(sat) behavior |
| Review | RDS(on), gate charge, thermal path | VCE(sat), switching loss, gate drive |
| RFQ risk | Package and rating suffixes | Voltage class and thermal qualification |
Option labels summarize the comparison topic; the full engineering and procurement requirement controls the final decision.
Selection factors
- Bus voltage and transient margin
- Switching frequency and switching-loss budget
- Conduction loss, thermal path, and package
- Gate-drive requirements and protection
Procurement implications
- Confirm voltage class, current, RDS(on) or VCE(sat), package, temperature grade, and lifecycle status.
- An alternate requires electrical, thermal, mechanical, and qualification review.
