1200 V / 50 A TrenchStop IGBT in TO-247-3
The Infineon IGW25T120FKSA1 is a 1200 V, 50 A NPT Trench Field Stop IGBT from the TrenchStop series, housed in a through-hole TO-247-3 package. It is designed for hard-switching power conversion in industrial drives, UPS systems, and welding inverters where 1200 V bus voltage isolation and 150°C junction capability are required.
Conduction and switching losses at the operating point
At the test condition of 600 V bus, 25 A collector current, 22 Ω gate resistor, and 15 V gate drive, the IGW25T120FKSA1 delivers a Vce(on) of 2.2 V typical and a total switching energy of 4.2 mJ. The 155 nC gate charge sets the drive current requirement — a typical gate driver with 2 A peak source/sink capability will switch this device in the 50 ns turn-on / 560 ns turn-off window at 25°C. The 190 W maximum power dissipation in the TO-247 package means the thermal interface to the heatsink is the limiting factor for continuous current — expect to derate from the 50 A Ic rating in real-world enclosures above 100°C case temperature.
Package, mounting, and temperature grade
The PG-TO247-3-1 supplier package is a standard TO-247 with three leads and an isolated mounting hole. The through-hole leads require a 0.040-inch (1.0 mm) drilled hole per lead in the PCB, with adequate creepage distance — at 1200 V working voltage, 6.4 mm minimum clearance per IEC 60950 is typical between collector tab and any grounded heatsink. Rated for continuous junction operation from -40°C to 150°C, this IGBT suits outdoor telecom rectifiers, solar inverter DC-AC stages, and motor drive output stages where the ambient may cycle below freezing.
Lifecycle and compliance status
ROHS3 compliant, with no lead in the solder plating or mould compound. No official second-source or pin-compatible replacement is listed; the TrenchStop series is Infineon's own platform, so cross-shopping a competitor's TO-247 IGBT requires verifying the gate threshold voltage window and the switching energy trade-off at the same test condition.