STMicroelectronics STGWT20IH125DF

Overview

STGWT20IH125DF from STMicroelectronics is a 1250 V, 20 A trench gate field-stop IGBT with co-packaged soft-recovery freewheeling diode in TO-3P package, optimized for resonant and soft-switching topologies. It delivers V_CE(sat) = 2.0 V (typ.) at I_C = 15 A, T_J = 25 °C, R_thJC(IGBT) = 0.58 °C/W, and operates up to T_J = 175 °C - enabling high-efficiency induction heating and microwave oven power stages.

For engineers reviewing the STGWT20IH125DF datasheet, STGWT20IH125DF pinout, STGWT20IH125DF application, or STGWT20IH125DF equivalent, key selection criteria include soft commutation capability, tight parameter distribution for paralleling, low tail current, co-packaged diode VF ≤ 1.5 V at I_F = 15 A, and thermal resistance validated for continuous 20 A operation at T_C = 100 °C.

Technical Context

This IGBT employs ST's proprietary trench gate field-stop structure to simultaneously minimize conduction losses (V_CE(sat) = 2.0–2.3 V across T_J = 25–175 °C) and switching losses (E_off = 410–820 μJ at I_C = 15 A, V_CC = 600 V). Its internal schematic integrates a low-V_F soft-recovery diode (V_F = 1.1–1.25 V at I_F = 15–30 A), enabling zero-voltage or zero-current switching in resonant converters without external diode selection.

The device is rated for V_CES = 1250 V, I_C = 20 A continuous at T_C = 100 °C, and supports safe paralleling due to positive V_GE(th) temperature coefficient (5–7 V) and minimized parameter spread. Gate charge Q_g = 69 nC enables predictable drive design with 10 Ω gate resistor yielding t_d(off) ≈ 106–109 ns and t_f ≈ 79–176 ns across temperature.

Key Specifications

Pinout & Package

STGWT20IH125DF is housed in a TO-3P (also known as TO-247-3L variant with insulated tab) package featuring isolated metal tab for direct heatsink mounting and creepage/clearance compliance in high-voltage AC-DC and resonant applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar IGBT switch applications.

Compared with STGW20IH125DF and IXGN50N120B3, STGWT20IH125DF uniquely combines TO-3P insulation, integrated soft diode, and 2.0 V V_CE(sat) to reduce BOM count and improve reliability in resonant induction systems - making it the optimal choice where safety isolation and EMI control are mandatory.

Availability

STGWT20IH125DF is available at Aetrix Electronics and suitable for induction heating cooktops, microwave oven inverters, resonant LLC converters, and industrial induction melting systems requiring stable component supply across multi-year production cycles.

Supply support for STGWT20IH125DF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and power applications since 1987.

This device belongs to ST's IH series of trench gate field-stop IGBTs, engineered specifically for high-efficiency resonant and soft-switching power conversion - targeting induction heating, microwave ovens, and high-frequency industrial inverters.

FAQ

Is STGWT20IH125DF suitable for hard-switched applications?

No - the datasheet explicitly states it is "designed for soft commutation only." Its optimized tail current profile and lack of rugged short-circuit rating make it unsuitable for hard-switched topologies like traditional PWM motor drives or non-resonant SMPS. Use only in ZVS/ZCS configurations with adequate dead-time and snubber design.

What is the maximum gate resistor value recommended for reliable turn-off?

Based on Figure 20, t_d(off) increases from 106 ns to ~140 ns when R_G rises from 10 Ω to 30 Ω at T_J = 25 °C. For stable operation up to 50 kHz with margin, ST recommends R_G ≤ 22 Ω to maintain t_d(off) < 130 ns and avoid shoot-through in bridge configurations.

Does the co-packaged diode share the same thermal path as the IGBT die?

Yes - both dies are mounted on the same copper base within the TO-3P package. Thermal resistance junction-to-case is specified separately: R_thJC = 0.58 °C/W for the IGBT and 1.47 °C/W for the diode, confirming distinct but thermally coupled paths. This enables accurate dual-die thermal modeling in system-level simulations.

Can STGWT20IH125DF be paralleled with STGW20IH125DF?

Yes - both share identical electrical characteristics (V_CE(sat), V_GE(th), Q_g) and thermal specs. However, STGWT20IH125DF's insulated tab eliminates need for isolating hardware, while STGW20IH125DF requires insulating washers. Paralleling is viable only if gate drive layout ensures matched loop inductance and equalized current sharing via emitter resistors.