STMicroelectronics STW69N65M5

Overview

STW69N65M5 from STMicroelectronics is an N-channel 650 V, 37 mΩ typ. (45 mΩ max), 58 A MDmesh M5 Power MOSFET in TO-247 package, designed for high-efficiency hard-switching and resonant topologies in industrial SMPS, PFC stages, and solar inverters. It delivers 150 °C max junction temperature, 15 V/ns dv/dt capability, and 1410 mJ single-pulse avalanche energy.

For engineers reviewing the STW69N65M5 datasheet, STW69N65M5 pinout, STW69N65M5 application, or STW69N65M5 equivalent, key selection criteria include R_DS(on) at 10 V gate drive, 143 nC total gate charge, 6420 pF input capacitance, and thermal resistance of 0.38 °C/W (junction-to-case), critical for high-power density thermal design.

Technical Context

This device employs ST's MDmesh M5 vertical superjunction process combined with PowerMESH horizontal layout to achieve ultra-low on-resistance while maintaining robust 650 V breakdown voltage and fast switching performance. Its 11 pF Crss and 536 pF Co(tr) support high-frequency operation with low switching losses.

The integrated body diode features 480 ns reverse recovery time (T_J = 25 °C) and 11 µC Q_rr, enabling reliable operation in inductive switching circuits without external snubbers in many PFC and LLC applications.

Key Specifications

Pinout & Package

STW69N65M5 is housed in a TO-247 package with isolated tab (drain-connected), optimized for high-current PCB mounting and heatsink coupling. The package meets ECOPACK environmental compliance standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STW69N65M5, STW78N65M5 trades conduction efficiency for cost in thermally relaxed designs, while IPW65R041CFD7 offers higher temperature resilience and slightly lower gate charge-but requires revalidation of gate drive timing and thermal interface design.

Availability

STW69N65M5 is available at Aetrix Electronics and suitable for industrial SMPS, solar inverters, and induction heating systems requiring stable component supply, long-life qualification, and consistent parametric performance across production lots.

Supply support for STW69N65M5 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 M5 Power MOSFET product line, engineered specifically for high-efficiency, high-reliability 600–650 V switching in demanding industrial power conversion applications.

FAQ

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

The STW69N65M5 supports 36.5 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS8936 Rev 3. This derating reflects thermal limits of the TO-247 package and ensures safe operation within the SOA boundary at elevated temperatures without exceeding 150 °C junction temperature.

Is the drain tab electrically isolated from the package mount surface?

No-the drain (pin 2) is directly connected to the exposed metal tab in the TO-247 package. Electrical isolation from the heatsink must be achieved using a dielectric washer or insulating thermal pad rated for ≥3.5 kV RMS, per the V_ISO specification in Table 1.

Does this MOSFET require negative gate turn-off voltage?

No-STW69N65M5 is fully characterized for 0 V to +10 V gate drive (with ±25 V absolute maximum rating). Negative turn-off is not required; however, a small negative bias (e.g., −5 V) may improve noise immunity in high-dv/dt environments without affecting reliability.

How does its body diode performance compare to silicon carbide alternatives?

The STW69N65M5 body diode exhibits 480 ns trr and 11 µC Q_rr at 25 °C-significantly softer than standard Si MOSFETs but slower and higher-loss than SiC Schottky diodes. It is adequate for 100 kHz PFC and resonant converters but not recommended for >200 kHz ZVS topologies where SiC diodes provide superior recovery behavior.