1200 V trench field-stop IGBT for automotive traction and industrial inverters
The Infineon IKW25N120CS7XKSA1 is a 1200 V, 55 A Trench Field Stop IGBT from the Automotive TrenchStop series, housed in a through-hole TO-247-3 package. It's built for the high-side switch in three-phase inverter legs, on-board charger PFC stages, and DC-DC converters where the DC bus sits at 800 V or below. The Trench Field Stop structure keeps the saturation voltage at 2 V typical at 25 A and 15 V gate drive, which means conduction losses stay manageable even at full load. The 150 nC gate charge figure tells the gate-drive designer what peak current the driver needs to hit the target switching speed — plan for a driver that can source and sink at least 2 A to keep the turn-on and turn-off edges clean.
Switching performance under the hood
Tested at 600 V, 25 A with a 6 Ω gate resistor and 15 V gate drive, this part switches on in 21 ns and off in 160 ns, with 1.2 mJ turn-on energy and 1.1 mJ turn-off energy. The 150 ns reverse recovery time of the co-packaged diode matters when you're hard-switching into an inductive load — it sets the dead-time floor and the recovery loss contribution. For a 16 kHz switching frequency inverter, those switching losses add up to about 37 W at the test condition, so the 250 W power dissipation rating gives enough thermal headroom if the heatsink is sized properly.
Automotive qualification and production status
The ROHS3 compliance means no exemption-based headaches for EU-market builds. For a production BOM that needs a second-source hedge, the TrenchStop family includes several 1200 V TO-247 parts with similar pinouts — the closest parametric match would share the same Vce(sat) and switching energy profile, but the exact cross-reference depends on your gate drive voltage and switching frequency. The active lifecycle means no LTB risk for the next few years, but if you're planning a five-year production run, it's worth asking Infineon for the PCN notification enrollment on this series.
Package and mounting considerations
The PG-TO247-3 package is the standard three-lead through-hole format with the centre pin as collector. The tab is electrically live (collector potential), so the heatsink needs an insulating pad or a thermal interface material rated for 1200 V isolation. The 250 W dissipation assumes the case is held at 25 °C — in practice, expect to derate to about 100 W with a forced-air heatsink at 85 °C ambient.