STMicroelectronics STW56N65M2

Overview

STW56N65M2 from STMicroelectronics is an N-channel 650 V, 49 A MDmesh M2 Power MOSFET in TO-247 package with 49 mΩ typical R_DS(on), 93 nC total gate charge, and 150 °C maximum junction temperature. It delivers low conduction loss and optimized switching performance for high-efficiency hard-switched and resonant converters in industrial SMPS and solar inverters.

For engineers reviewing the STW56N65M2 datasheet, STW56N65M2 pinout, STW56N65M2 application, or STW56N65M2 equivalent, key selection criteria include avalanche ruggedness (1.3 J E_AS), C_oss profile (160 pF at 100 V), dv/dt immunity (50 V/ns), and Zener-protected gate reliability under transient stress.

Technical Context

This MOSFET employs ST's MDmesh M2 strip layout and enhanced vertical structure to simultaneously reduce R_DS(on) and output capacitance while maintaining robust avalanche capability. Its 838 pF C_oss,eq (0–520 V) enables predictable energy storage during turn-off transitions in high-voltage clamped topologies.

The device integrates a Zener-protected gate oxide and passes 100% unclamped inductive switching (UIS) testing at I_AR = 3.5 A. Its diode exhibits 554 ns t_rr and 13.5 µC Q_rr at 25 °C, supporting moderate-frequency synchronous rectification where reverse recovery control is critical.

Key Specifications

Pinout & Package

TO-247 package with isolated tab (drain-connected), 3-terminal configuration. Case-to-drain thermal path enables direct heatsink mounting with electrical isolation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IXTH50N65X2 and IPP65R120CFD7, STW56N65M2 offers the best balance of low R_DS(on), robust avalanche rating, and integrated gate protection - making it optimal for cost-sensitive, high-reliability 650 V hard-switched industrial power stages.

Availability

STW56N65M2 is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, solar DC-AC inverters, and EV on-board chargers requiring stable component supply and long-term production continuity.

Supply support for STW56N65M2 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

STW56N65M2 belongs to the MDmesh M2 high-voltage Power MOSFET product line, engineered specifically for high-efficiency, high-reliability 600–650 V power conversion in industrial SMPS, UPS, and renewable energy systems.

FAQ

What is the maximum continuous drain current at case temperature of 100 °C?

The STW56N65M2 supports 31 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS10775 Rev 2. This value is derived from SOA limitations and thermal resistance (R_thJC = 0.35 °C/W), not ambient-rated derating. Operation above this current requires active cooling or pulse-width limitation.

Does STW56N65M2 include an integrated body diode, and what are its key recovery parameters?

Yes, STW56N65M2 features a monolithic source-drain diode with t_rr = 554 ns and Q_rr = 13.5 µC at T_J = 25 °C, ISD = 49 A, and di/dt = 100 A/µs. At 150 °C, t_rr increases to 688 ns and Q_rr to 18 µC. The diode is not ultra-fast but is fully characterized and rated for use in freewheeling and synchronous rectification roles.

Can STW56N65M2 be used in zero-voltage switching (ZVS) topologies without external snubbers?

Yes - its C_oss,eq = 838 pF over 0–520 V provides predictable energy storage (≈115 µJ at 520 V), enabling reliable ZVS in LLC and phase-shifted full-bridge converters. However, ZVS initiation depends on circuit inductance and load; the device itself does not guarantee ZVS but provides the necessary C_oss linearity and low Q_gd to support it.

Is the TO-247 package lead-free and RoHS-compliant?

Yes, STW56N65M2 is supplied in an ECOPACK2-compliant TO-247 package, meeting RoHS Directive 2011/65/EU and REACH SVHC requirements. The device is halogen-free and qualifies for lead-free soldering processes with peak temperatures up to 260 °C, as confirmed in Section 4 of DS10775 Rev 2.