STMicroelectronics STW69N65M5-4

Overview

STW69N65M5-4 from STMicroelectronics is an N-channel 650 V, 37 mΩ typ. (45 mΩ max), 58 A MDmesh M5 Power MOSFET in TO-247-4 package with dedicated driver source pin. It delivers high dv/dt ruggedness (50 V/ns), 100% avalanche tested operation, and optimized switching for multi-kW hard-switched topologies. Used in telecom rectifiers and PV inverter DC-link stages where low conduction loss and fast diode recovery are critical.

For engineers reviewing the STW69N65M5-4 datasheet, STW69N65M5-4 pinout, STW69N65M5-4 application, or STW69N65M5-4 equivalent, key selection criteria include R_DS(on) at 10 V, Q_g/Q_gd ratio, Co(er) energy-related capacitance, avalanche energy rating (E_AS = 1410 mJ), and TO-247-4 four-terminal layout enabling Kelvin source sensing.

Technical Context

This MOSFET employs ST's MDmesh M5 vertical superjunction process combined with PowerMESH horizontal layout to achieve 37 mΩ typ. R_DS(on) at 650 V blocking. Its TO-247-4 package integrates a separate driver source terminal (Pin 3) to eliminate source inductance impact on gate drive loop, improving switching control fidelity and reducing voltage overshoot during turn-off.

The device exhibits 15 V/ns diode recovery dv/dt capability and 50 V/ns MOSFET dv/dt ruggedness under specified conditions (V_DD ≤ 640 V). Its reverse recovery charge (Q_rr) is 11 µC at 25 °C and rises to 16 µC at 150 °C, with trr extending from 480 ns to 592 ns - critical for snubberless ZVS/ZCS design in high-frequency converters.

Key Specifications

Pinout & Package

TO-247-4 package with isolated drain tab, standard mounting hole, and four discrete terminals: Drain (Pin 1), Power Source (Pin 2), Driver Source (Pin 3), Gate (Pin 4). The dual-source configuration separates high-current power return from low-noise gate reference path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IXFH50N65X2 and IPW65R041CFD7, STW69N65M5-4 uniquely combines 45 mΩ max R_DS(on), 50 V/ns dv/dt ruggedness, and a dedicated driver source pin - making it the only option among the three qualified for unclamped inductive switching in telecom infrastructure with guaranteed 1410 mJ avalanche energy.

Availability

STW69N65M5-4 is available at Aetrix Electronics and suitable for server power supplies, photovoltaic inverters, and telecom rectifier modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial deployment.

Supply support for STW69N65M5-4 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.

This device belongs to ST's MDmesh M5 high-voltage power MOSFET product line, engineered specifically for high-efficiency, high-power-density switched-mode power supplies and renewable energy conversion systems operating above 400 V DC.

FAQ

What is the purpose of the fourth pin (Driver Source) on the STW69N65M5-4?

The fourth pin (Pin 3) is a dedicated driver source terminal that provides a Kelvin connection to the MOSFET's source region, decoupling the gate drive return path from the high-current power source (Pin 2). This eliminates voltage drop across source inductance during switching transitions, preventing gate oscillation and ensuring accurate V_GS control - especially critical at >100 kHz and high di/dt.

How does the 50 V/ns dv/dt ruggedness specification impact system design?

The 50 V/ns MOSFET dv/dt ruggedness rating means the device can withstand rapid drain voltage transients up to that rate without false turn-on or latch-up, provided V_DD ≤ 640 V. This allows elimination of external gate resistors or RC snubbers in high-speed motor drives and telecom rectifiers, simplifying layout and improving reliability under transient overvoltage conditions.

Is the STW69N65M5-4 suitable for use in synchronous rectification topologies?

Yes - its body diode exhibits 11 µC reverse recovery charge (Q_rr) and 480 ns trr at 25 °C, with low forward voltage (V_SD = 1.5 V at 58 A), making it viable for synchronous rectification in medium-frequency LLC or phase-shifted full-bridge converters. However, for optimal efficiency above 300 kHz, a dedicated SiC Schottky or GaN FET is preferred due to lower Q_rr.

What thermal derating applies when operating at T_C = 100 °C?

At T_C = 100 °C, the continuous drain current rating drops from 58 A (at 25 °C) to 36.5 A, per absolute maximum ratings. This reflects junction temperature limits (T_J ≤ 150 °C) and R_thJC = 0.38 °C/W. Conduction loss increases ~2.3× due to R_DS(on) temperature coefficient - verified by Figure 10 showing 1.7× normalized resistance at 100 °C.