STMicroelectronics STWA75N65DM6

Overview

STWA75N65DM6 from STMicroelectronics is a high-voltage N-channel MDmesh DM6 Power MOSFET in TO-247 long leads package, rated 650 V V_DS, 36 mΩ R_DS(on) max at 10 V V_GS, and 75 A continuous drain current at T_C = 25 °C. It features fast-recovery body diode (t_rr = 149 ns, Q_rr = 0.92 µC), 100% avalanche tested, and extreme dv/dt ruggedness (100 V/ns), targeting ZVS phase-shift converters and high-efficiency bridge topologies.

For engineers reviewing the STWA75N65DM6 datasheet, STWA75N65DM6 pinout, STWA75N65DM6 application, or STWA75N65DM6 equivalent, key selection criteria include R_DS(on) per area improvement over prior MDmesh generations, low gate charge (Q_g = 118 nC), C_oss,eq = 960 pF for soft-switching optimization, and Zener-protected gate for robust system-level ESD immunity.

Technical Context

This device implements ST's MDmesh DM6 silicon architecture optimized for high-frequency, high-efficiency switching in hard- and soft-switched topologies. Its low Q_rr (0.92 µC @ 25 °C, 4.12 µC @ 150 °C) and fast t_rr (149–280 ns) minimize commutation losses and diode reverse recovery stress in LLC and phase-shift full-bridge converters.

The MOSFET delivers 100 V/ns dv/dt ruggedness under specified conditions (V_DS ≤ 520 V), supported by intrinsic Zener gate protection and 1.5 Ω R_G. Its R_thJC = 0.26 °C/W enables high-power operation with effective heatsinking, while C_iss/C_oss/C_rss values (5700/280/3 pF) facilitate precise gate drive design for <100 kHz to 500 kHz applications.

Key Specifications

Pinout & Package

TO-247 long leads package with isolated tab (D), gate (G), and source (S) terminals. Tab is electrically connected to drain (D); mounting surface must be insulated unless drain is at ground potential.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STW75N65DM6 and IXFH75N65X3, STWA75N65DM6 uniquely combines long-lead isolation, Zener gate protection, and optimized Q_rr/R_DS(on) trade-off for industrial-grade reliability in medium-frequency (50–200 kHz) bridge topologies.

Availability

STWA75N65DM6 is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, server & telecom rectifiers, and EV onboard chargers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STWA75N65DM6 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 analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

This device belongs to the MDmesh DM6 family-engineered specifically for high-efficiency, high-reliability power conversion in 50–500 kHz hard- and soft-switched topologies, emphasizing low conduction + switching loss synergy.

FAQ

What is the maximum recommended gate drive voltage for STWA75N65DM6?

The absolute maximum gate-source voltage is ±25 V, and the device is characterized for operation at V_GS = 10 V for R_DS(on) specification. Driving above 15 V provides marginal R_DS(on) improvement but increases gate oxide stress; 12–15 V is typical for optimal trade-off between on-resistance and reliability.

Can STWA75N65DM6 replace STW75N65DM6 in existing designs?

Yes, electrically identical, but STWA75N65DM6 uses TO-247 long leads with isolated tab, whereas STW75N65DM6 uses short leads. Mechanical compatibility depends on heatsink mounting: long leads allow insulated mounting without additional pads; short leads require careful creepage verification in high-voltage designs.

How does the fast-recovery body diode perform at elevated junction temperatures?

At T_J = 150 °C, t_rr increases to 280 ns and Q_rr rises to 4.12 µC-both confirmed in datasheet Table 7. This degradation is predictable and accounted for in thermal design; gate drive timing margins should be verified at worst-case temperature.

Is external gate resistor required for reliable operation?

Yes-a series gate resistor (typically 4.7–10 Ω) is required to dampen ringing, limit peak gate current, and control dV/dt during switching. The intrinsic R_G is 1.5 Ω; external resistance sets total gate loop impedance and ensures stable turn-on/turn-off transitions per Figure 13 test circuit.