STMicroelectronics STB6N65M2

Overview

STB6N65M2 from STMicroelectronics is an N-channel 650 V, 1.35 Ω (max), 4 A Power MOSFET in D²PAK (TO-263) package, built on MDmesh™ M2 technology for high-efficiency switching converters. It features 100% avalanche-tested ruggedness, Zener-protected gate, and optimized COSS profile for reduced switching losses in SMPS and PFC stages.

For engineers reviewing the STB6N65M2 datasheet, STB6N65M2 pinout, STB6N65M2 application, or STB6N65M2 equivalent, key selection criteria include its 50 V/ns dv/dt ruggedness, 9.8 nC total gate charge, 1.6 V source-drain forward voltage at 4 A, and thermal resistance of 2.08 °C/W junction-to-case - critical for high-reliability industrial power designs.

Technical Context

This MOSFET employs a strip-based vertical structure with enhanced charge balancing to achieve low RDS(on) while maintaining robust avalanche capability. Its COSS eq. of 114 pF (0–520 V) and Crss of 0.65 pF enable fast, low-loss hard-switching in 650 V topologies.

The device integrates gate Zener protection rated at ±25 V, supports 16 A pulsed drain current, and delivers 100 mJ single-pulse avalanche energy - enabling reliable operation under unclamped inductive load conditions without external clamping.

Key Specifications

Pinout & Package

Package: D²PAK (TO-263), surface-mount, thermally enhanced with exposed drain tab (Pin 2) for PCB heat sinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STD6N65M2 and STP6N65M2, STB6N65M2 uniquely combines D²PAK thermal performance, integrated gate protection, and 50 V/ns dv/dt immunity - making it the only option qualified for compact, high-efficiency 650 V converters requiring zero external gate clamping and minimal heatsinking.

Availability

STB6N65M2 is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, EV on-board chargers, and renewable energy inverters requiring stable component supply across multi-year production cycles.

Supply support for STB6N65M2 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 management, microcontrollers, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.

STB6N65M2 belongs to the MDmesh™ M2 high-voltage Power MOSFET product line, engineered specifically for high-efficiency, high-power-density AC-DC and DC-DC conversion in demanding industrial and energy infrastructure applications.

FAQ

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

The STB6N65M2 supports 2.5 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS10516 Rev 2. This derating reflects thermal limitations of the D²PAK package and ensures safe operation within the SOA boundary at elevated ambient temperatures in enclosed power modules.

Does STB6N65M2 require external gate protection?

No - STB6N65M2 integrates a monolithic Zener diode between gate and source, rated for ±25 V, eliminating the need for external gate protection components in standard gate-drive configurations. This is confirmed in the "Features" section and validated by absolute maximum rating V_GS = ±25 V.

How does its avalanche rating compare to industry standards?

STB6N65M2 is 100% production-tested for single-pulse avalanche energy (E_AS = 100 mJ at V_DD = 50 V, I_AR = 0.5 A), exceeding JEDEC JESD24-11 requirements for industrial-grade MOSFETs. Repetitive avalanche current is guaranteed at 0.5 A, enabling reliable operation in unclamped inductive switching without snubbers.

Can STB6N65M2 be used in place of STP6N65M2 in existing TO-220 designs?

No - STB6N65M2 uses a surface-mount D²PAK package with different footprint, thermal path, and pinout (Drain = Tab, Gate = Pin 1, Source = Pin 3). Direct substitution requires PCB redesign, new thermal pad layout, and revalidation of gate-drive loop inductance due to lower package inductance.