STMicroelectronics STWA65N045M9

Overview

STWA65N045M9 from STMicroelectronics is a 650 V, 54 A N-channel super-junction Power MOSFET in TO-247 long leads package, featuring 45 mΩ max R_DS(on), 80 nC total gate charge, and 120 V/ns MOSFET dv/dt ruggedness. It delivers best-in-class FOM (R_DS(on) × Q_g) among silicon devices and is 100% avalanche tested for robustness in high-voltage switching circuits such as server SMPS and industrial PFC stages.

For engineers reviewing the STWA65N045M9 datasheet, STWA65N045M9 pinout, STWA65N045M9 application, or STWA65N045M9 equivalent, key selection criteria include its 650 V V_DSS, 39 mΩ typ. R_DS(on) at 10 V_GS, 54 A continuous drain current, 312 W power dissipation, and TO-247 thermal resistance of 0.40 °C/W junction-to-case.

Technical Context

This MDmesh M9 device uses a multi-drain silicon process to achieve ultra-low on-resistance per die area and reduced output capacitance (C_oss,eq = 885 pF). Its 120 V/ns dv/dt ruggedness and 50 V/ns diode recovery dv/dt rating enable stable operation in hard-switched topologies with fast voltage transients.

The MOSFET integrates a robust body diode with 288 ns typical reverse recovery time (T_J = 25 °C) and 4 µC Q_rr, supporting ZVS-capable resonant converters. Gate threshold voltage (3.2–4.2 V) and low intrinsic gate resistance (1 Ω) ensure compatibility with standard 10 V gate drivers and reduce drive loss.

Key Specifications

Pinout & Package

Package: TO-247 long leads (ECOPACK® compliant), with tab-connected drain, isolated gate, and source terminals. Thermal pad is electrically connected to drain.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage super-junction MOSFET applications.

Compared with IPW65R041C7 and IXTH60N65X2, STWA65N045M9 achieves optimal balance: lowest FOM (3.6 µΩ·nC), highest dv/dt ruggedness (120 V/ns), and guaranteed avalanche performance-making it ideal for mission-critical industrial and server power where reliability and efficiency co-constrain design.

Availability

STWA65N045M9 is available at Aetrix Electronics and suitable for server SMPS, industrial PFC, and solar inverter DC/DC applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for STWA65N045M9 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

This device belongs to the MDmesh™ M9 super-junction MOSFET product line, engineered specifically for high-efficiency, high-power-density medium-voltage switching applications up to 650 V, with emphasis on PFC, server power, and renewable energy conversion.

FAQ

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

The STWA65N045M9 supports 34 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS14231 Rev 3. This derating reflects thermal limits imposed by its 0.40 °C/W R_thJC and 150 °C maximum junction temperature, ensuring safe operation in thermally constrained enclosures without forced airflow.

Is the body diode suitable for synchronous rectification?

No-the integrated body diode is not optimized for synchronous rectification due to its relatively high V_SD (1.5 V at 55 A) and 288 ns reverse recovery time. It is designed for freewheeling and clamping in hard-switched topologies; external Schottky or GaN FETs are recommended for synchronous rectifier roles requiring low forward drop and zero Q_rr.

Does this MOSFET require negative gate turn-off voltage?

No-STWA65N045M9 operates reliably with 0 V to 10 V gate drive and does not require negative turn-off bias. Its gate threshold voltage (3.2–4.2 V) and ±30 V V_GS rating allow use with standard unipolar gate drivers; negative voltage is unnecessary unless mitigating Miller-induced shoot-through in very high dv/dt environments.

How is avalanche ruggedness validated for this part?

Avalanche performance is validated per JEDEC JESD24-11: all units undergo 100% production testing at I_AR = 6 A and E_AS = 775 mJ (T_J = 25 °C, V_DD = 50 V). Test conditions replicate unclamped inductive switching stress, confirming robustness against transient overvoltage events without parameter drift or parametric failure.