STMicroelectronics STF9N65M2

Overview

STF9N65M2 from STMicroelectronics is an N-channel 650 V, 0.90 Ω max, 5 A Power MOSFET in TO-220FP package, built on MDmesh M2 technology for high-efficiency SMPS, PFC stages, and industrial AC-DC converters. It features 100% avalanche testing, Zener gate protection, and optimized COSS for reduced switching loss.

For engineers reviewing the STF9N65M2 datasheet, STF9N65M2 pinout, STF9N65M2 application, or STF9N65M2 equivalent, key selection criteria include RDS(on) at 10 V, Qg (10.3 nC), dv/dt ruggedness (50 V/ns), and thermal resistance (Rthj-case = 6.25 °C/W), critical for hard-switched 650 V topologies.

Technical Context

This device employs ST's MDmesh M2 strip layout and enhanced vertical structure to achieve low on-resistance while maintaining robust fast-recovery body diode performance (trr = 276 ns, Qrr = 1.7 µC). Its gate threshold voltage (2–4 V) ensures stable turn-on under wide temperature ranges.

The TO-220FP package provides insulated leads with 2.5 kV RMS isolation, enabling direct mounting on heatsinks without additional insulation. Its 50 V/ns MOSFET dv/dt ruggedness and 15 V/ns diode recovery dv/dt rating support reliable operation in noisy high-voltage environments.

Key Specifications

Pinout & Package

STF9N65M2 uses the TO-220FP (Full-Pak) package: insulated plastic case with three leads, no metal tab connection to drain, enabling direct heatsink mounting without insulator. Thermal resistance junction-to-case is 6.25 °C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 650 V Power MOSFET applications.

Compared with STF9N65M2, STP9N65M2 offers superior thermal dissipation but demands external isolation, while IPB9N65M2 enables SMT production and lower-profile mounting-both retain identical electrical specs and avalanche capability.

Availability

STF9N65M2 is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, server rectifiers, and renewable energy inverters requiring stable component supply across multi-year production cycles.

Supply support for STF9N65M2 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 industrial, automotive, and consumer markets.

STF9N65M2 belongs to the MDmesh M2 Power MOSFET product line, engineered specifically for high-efficiency, high-voltage switching applications including PFC, SMPS, and motor control where low RDS(on) and controlled switching losses are critical.

FAQ

What is the maximum continuous drain current for STF9N65M2 at 100 °C case temperature?

The maximum continuous drain current is 3.2 A at TC = 100 °C, limited by package thermal resistance (6.25 °C/W) and silicon SOA. This value is specified in Table 1 of DS10197 Rev 3 and reflects safe operation without exceeding TJ = 150 °C under steady-state conditions.

Does STF9N65M2 have an integrated body diode, and what are its key recovery parameters?

Yes, it features a monolithic source-drain body diode with trr = 276 ns, Qrr = 1.7 µC, and IRRM = 12.5 A at TJ = 25 °C (Table 7). These values are measured under standardized inductive switching conditions (ISD = 5 A, di/dt = 100 A/µs, VDD = 60 V) and support reliable operation in hard-switched and quasi-resonant converters.

Can STF9N65M2 be used in avalanche-mode operation, and what is its rated single-pulse energy?

Yes, STF9N65M2 is 100% avalanche tested with a rated single-pulse avalanche energy (EAS) of 105 mJ at TJ = 25 °C, ID = 1 A, and VDD = 50 V (Table 3). This rating ensures robustness against inductive switching transients in PFC and flyback topologies without external snubbers.

What is the gate threshold voltage range, and how does it vary with temperature?

VGS(th) ranges from 2 V to 4 V at 25 °C (Table 4), with normalized variation shown in Figure 13: it decreases to ~0.7× nominal at TJ = 125 °C. This negative temperature coefficient ensures inherent current sharing stability in parallel configurations and predictable turn-on behavior across industrial temperature ranges.