STMicroelectronics STW26NM60

Overview

STW26NM60 from STMicroelectronics is an N-channel 600 V, 26 A Zener-protected MDmesh™ power MOSFET in TO-247 package with R_DS(on) = 0.125 Ω (typ), 15 V/ns dv/dt capability, and 740 mJ single-pulse avalanche energy. It serves as a high-voltage switching device in offline SMPS, PFC stages, and industrial motor drives requiring robust unclamped inductive switching.

For engineers reviewing the STW26NM60 datasheet, STW26NM60 pinout, STW26NM60 application, or STW26NM60 equivalent, key selection criteria include its 600 V V_DSS, 0.125 Ω R_DS(on), integrated gate-source Zener protection (±30 V), 73 nC total gate charge, and TO-247 thermal resistance of 0.4 °C/W - all critical for high-efficiency, high-reliability HV converter design.

Technical Context

This MOSFET employs ST's MDmesh™ technology-combining Multiple Drain process and PowerMESH™ horizontal layout-to achieve low conduction loss while maintaining high dv/dt immunity (15 V/ns) and rugged avalanche performance (13 A repetitive I_AR, 740 mJ E_AS). Its integrated back-to-back gate-source Zener diodes (V_Z = 30 V) eliminate external clamping components.

The device delivers low dynamic losses via optimized capacitance profile: C_iss = 2900 pF, C_oss = 900 pF, C_rss = 40 pF at V_DS = 25 V, and fast switching with t_d(on) = 35 ns, t_r = 22 ns, and Q_g = 73 nC under 480 V/26 A conditions - enabling high-frequency operation in resonant and hard-switched topologies.

Key Specifications

Pinout & Package

TO-247 package: 3-pin through-hole outline with isolated tab (drain-connected). Standard lead configuration: Pin 1 = Gate, Pin 2 = Drain (tab), Pin 3 = Source.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IPP60R120P7XKSA1 and IXFH32N60P, STW26NM60 uniquely combines integrated Zener protection, 740 mJ E_AS, and 0.125 Ω R_DS(on) in a single TO-247 device - simplifying design for rugged, high-density HV SMPS where reliability under transient stress is mandatory.

Availability

STW26NM60 is available at Aetrix Electronics and suitable for server PSUs, industrial PFC modules, induction heating inverters, and UPS output stages requiring stable component supply across multi-year production cycles.

Supply support for STW26NM60 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The MDmesh™ MOSFET product line targets high-efficiency, high-power-density switched-mode power supplies - specifically engineered to replace older planar technologies in 300–1000 W offline converters.

FAQ

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

The STW26NM60 supports 18.9 A continuous drain current at T_C = 100°C, as specified in the Absolute Maximum Ratings table. This derating reflects thermal limitations of the TO-247 package and must be applied when heatsink temperature exceeds 25°C - ensuring junction temperature remains ≤150°C under steady-state operation.

Does the integrated Zener diode protect against both positive and negative gate transients?

Yes - the device incorporates back-to-back Zener diodes between gate and source, providing symmetrical ±30 V clamping (BVGSO = 30 V min). This protects against both positive gate overvoltage (e.g., from Miller coupling) and negative transients (e.g., from fast turn-off with inductive gate loops), eliminating need for external bidirectional TVS.

Can STW26NM60 be used in zero-voltage switching (ZVS) topologies?

Yes - its low C_oss (900 pF) and controlled Q_rr (7 µC @ 25°C) support efficient ZVS operation in phase-shifted full-bridge and LLC resonant converters. The soft reverse recovery characteristic minimizes voltage overshoot during turn-on, reducing stress on the device and auxiliary components.

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

Yes - STW26NM60 is manufactured in a lead-free, RoHS-compliant TO-247 package per STMicroelectronics' standard qualification. The device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and supports lead-free reflow soldering up to 260°C peak temperature, with maximum lead temperature rated at 300°C for 10 seconds.