STMicroelectronics STGB20H65DFB2

Overview

STGB20H65DFB2 from STMicroelectronics is a 650 V, 20 A high-speed trench gate field-stop IGBT with co-packaged soft-recovery diode in D²PAK (TO-263) package. It delivers low V_CE(sat) = 1.65 V (typ. @ I_C = 20 A, T_J = 25 °C), fast switching (t_d(off) = 78.8 ns typ.), and minimized tail current for high-efficiency PFC and inverter stages in solar string inverters and DC fast EV charging stations.

For engineers reviewing the STGB20H65DFB2 datasheet, STGB20H65DFB2 pinout, STGB20H65DFB2 application, or STGB20H65DFB2 equivalent, key selection criteria include its 1.02 °C/W R_thJC (IGBT), 214 µJ E_off at 25 °C, 175 °C max junction temperature, and integrated antiparallel diode with 215 ns t_rr and 970 nC Q_rr - all critical for thermal management and switching loss optimization in high-frequency power conversion.

Technical Context

This IGBT employs ST's HB2 series trench gate field-stop structure optimized for conduction efficiency at low-to-moderate currents and reduced switching energy. Its positive V_CE(sat) temperature coefficient enables inherent current sharing in parallel configurations.

The co-packaged diode features very fast and soft reverse recovery (t_rr = 215 ns, Q_rr = 970 nC @ T_J = 25 °C), tight parameter distribution, and minimized tail current - directly supporting zero-voltage switching (ZVS) and reducing EMI in hard-switched topologies like boost PFC and two-level inverters.

Key Specifications

Pinout & Package

D²PAK (TO-263) package with isolated tab (collector), 3-pin configuration: Pin 1 = Gate (G), Pin 2 = Emitter (E), Pin 3 = Collector (C) / Tab (electrically connected to C). The metal tab serves as primary heat path and must be electrically isolated from heatsink unless circuit topology requires collector connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed 650 V IGBT applications.

Compared with IXGN20N60A3 and IKP20N60T6, STGB20H65DFB2 provides superior 650 V bus margin, integrated soft-recovery diode, and lower R_thJC, making it optimal for space-constrained, high-reliability applications where thermal density and EMI control are critical.

Availability

STGB20H65DFB2 is available at Aetrix Electronics and suitable for solar string inverters, single-phase PFC converters, and DC fast EV charging stations requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial production programs.

Supply support for STGB20H65DFB2 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, specializing in power, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.

The HB2 series IGBTs are designed specifically for high-efficiency, high-frequency power conversion in renewable energy and industrial motor drives - emphasizing low conduction loss, fast soft switching, and rugged thermal performance.

FAQ

What is the maximum recommended gate resistor value for STGB20H65DFB2 in a 50 kHz PFC application?

A 10 Ω gate resistor is validated in the datasheet for 400 V, 20 A switching at 50 kHz with TJ = 175 °C. Increasing beyond 15 Ω raises E_on and E_off nonlinearly - measured data shows +42% E_tot at RG = 20 Ω - risking thermal runaway under sustained load. Use 8–12 Ω for optimal trade-off between loss and dv/dt control.

Does STGB20H65DFB2 support parallel operation without emitter resistors?

Yes - its positive V_CE(sat) temperature coefficient and tight parameter distribution (±5% V_CE(sat), ±8% E_off) enable stable current sharing. Layout symmetry is critical: matched gate loop inductance (<10 nH difference) and identical thermal paths are required. Derate total current by 15% versus single-device rating per ST AN4722 guidelines.

Can the integrated diode replace an external ultrafast diode in a 30 kHz LLC resonant converter?

No - the co-packaged diode is optimized for antiparallel freewheeling in hard-switched topologies, not resonant ZVS. Its 215 ns t_rr and 970 nC Q_rr cause excessive ringback and loss in LLC secondary rectification. For LLC, use dedicated SiC Schottky diodes (e.g., STPSC20H065D) with <30 ns t_rr and near-zero Q_rr.

What is the minimum creepage distance required for STGB20H65DFB2 on FR-4 PCB at 650 V working voltage?

Per IEC 60664-1, 650 V DC requires ≥5.0 mm creepage for Pollution Degree 2 (indoor, non-conductive dust). ST's D²PAK footprint (E1 = 8.7–9.1 mm, E2 = 7.3–7.7 mm) provides 8.9 mm center-to-center spacing between pins 1 and 2, satisfying this requirement without slotting. Maintain ≥3.2 mm clearance from tab edge to adjacent traces.