STMicroelectronics STW68N60M6-4

Overview

STW68N60M6 from STMicroelectronics is an N-channel 600 V, 63 A MDmesh M6 superjunction power MOSFET in TO-247 package, featuring 35 mΩ typ. R_DS(on), 106 nC total gate charge, and 100 V/ns MOSFET dv/dt ruggedness. It delivers low conduction and switching losses for high-efficiency LLC and boost PFC converters operating at 100–500 kHz.

For engineers reviewing the STW68N60M6 datasheet, STW68N60M6 pinout, STW68N60M6 application, or STW68N60M6 equivalent, key selection criteria include avalanche energy (1100 mJ), Zener-protected gate, 150 °C max junction temperature, and 0.32 °C/W R_thJC for thermal management in high-power industrial SMPS designs.

Technical Context

This MOSFET employs ST's MDmesh M6 silicon technology, optimizing R_DS(on)/area while maintaining robust hard-switching capability. Its 13 pF Crss and 4360 pF Ciss enable fast, controllable turn-on/turn-off with minimal Miller effect-critical for resonant topologies requiring precise timing control.

The device integrates a Zener-protected gate structure and is 100% avalanche tested to 7.5 A repetitive current. Its source-drain diode exhibits 308 ns trr at 25 °C and 504 ns at 150 °C, supporting synchronous rectification in high-frequency PFC stages without external body diode mitigation.

Key Specifications

Pinout & Package

TO-247 package: isolated metal tab (Drain), center lead (Gate), right lead (Source). Mounting via case screw through tab; requires electrically insulating thermal interface.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage power switching applications.

Compared with IXTH60N60L2 and IPP60R041C7, STW68N60M6 offers verified avalanche robustness, integrated gate protection, and superior thermal resistance-making it optimal for mission-critical industrial PFC and LLC where field reliability is non-negotiable.

Availability

STW68N60M6 is available at Aetrix Electronics and suitable for server PSUs, industrial motor drives, solar inverters, and telecom rectifiers requiring stable component supply and long-term production continuity.

Supply support for STW68N60M6 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.

This device belongs to the MDmesh M6 superjunction MOSFET product line, engineered specifically for high-efficiency, high-frequency AC-DC and DC-DC conversion in industrial and telecom power systems.

FAQ

What is the maximum recommended gate resistor value for STW68N60M6 in a 250 kHz LLC converter?

A 4.7 Ω gate resistor is validated per datasheet Figure 18 for 250 kHz operation, yielding td(on) = 42 ns and tf = 8 ns. Increasing beyond 10 Ω risks incomplete turn-on within dead-time windows and elevated switching loss. For higher frequency stability, use a dedicated gate driver IC with 2 A sink/source capability and Kelvin source connection.

Does STW68N60M6 require a negative gate voltage for reliable turn-off in bridge configurations?

No. The device's V_GS(th) of 3.25–4.75 V and Zener protection allow safe operation with 0 V to 10 V gate drive. Negative bias is unnecessary unless operating near 100% duty cycle with high dv/dt coupling-where 0 V turn-off suffices per test data in Table 4 and Figure 18.

Can STW68N60M6 replace STW68N60M5 in existing designs without layout changes?

Yes-identical TO-247 package, pinout, and footprint. The M6 improves R_DS(on) by ~15% and reduces Q_g by 8%, lowering both conduction and switching loss. No PCB or driver redesign is needed, though gate drive strength should be verified if operating near thermal limits.

What is the safe operating area (SOA) limitation at 100 °C case temperature?

At T_C = 100 °C, the continuous drain current is derated to 40 A (Table 1). The SOA curve (Figure 1) shows pulse-limited operation up to 63 A for t_p ≤ 10 µs. For 1 ms pulses, max ID drops to ~25 A-designers must verify single-pulse energy (I²t) against E_AS = 1100 mJ to avoid thermal runaway.