STMicroelectronics STF46N60M6

Overview

STF46N60M6 from STMicroelectronics is an N-channel 600 V, 36 A, 68 mΩ typ. MDmesh M6 superjunction power MOSFET in TO-220FP package, designed for high-efficiency switching in hard-switched and resonant topologies. It delivers low conduction loss (R_DS(on) = 68 mΩ typ.), robust 100% avalanche-tested ruggedness (E_AS = 760 mJ), and optimized dynamic performance (Q_g = 53.5 nC, C_iss = 2340 pF) for LLC and boost PFC converters.

For engineers reviewing the STF46N60M6 datasheet, STF46N60M6 pinout, STF46N60M6 application, or STF46N60M6 equivalent, key selection criteria include its 600 V V_(BR)DSS, 36 A continuous drain current at T_case = 25 °C, 3 °C/W R_thj-case, 15 V/ns diode recovery dv/dt capability, and Zener-protected gate structure - all critical for reliable high-voltage SMPS design.

Technical Context

This MOSFET employs ST's MDmesh M6 technology, featuring enhanced charge balancing and reduced cell pitch to achieve lower R_DS(on) per die area versus prior MDmesh generations. Its optimized doping profile and trench-gate structure yield improved figure-of-merit (R_DS(on) × Q_g = 4.28 Ω·nC) and low Crss (3.7 pF), enabling fast, low-loss switching with minimal Miller effect.

The device integrates a monolithic Zener diode between gate and source for ESD and overvoltage protection, and its 100% unclamped inductive switching (UIS) test ensures guaranteed avalanche energy handling (I_AR = 5.2 A, E_AS = 760 mJ). The TO-220FP package provides insulated mounting (2.5 kV RMS isolation) while maintaining thermal resistance of 3 °C/W junction-to-case.

Key Specifications

Pinout & Package

Supplied in TO-220FP (Full-Pak) package with insulated tab: electrically isolated metal backside rated for 2.5 kV RMS to heat sink, enabling direct mounting without insulating pads. Package height 10.2 mm, outline per ST drawing 7012510_Rev_13_B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IPP60R099C7 and STW48N60M2, STF46N60M6 uniquely balances low R_DS(on), integrated gate protection, and TO-220FP insulation - making it optimal for space-constrained, medium-power industrial SMPS where reliability and simplified layout are prioritized over absolute peak current or lowest gate charge.

Availability

STF46N60M6 is available at Aetrix Electronics and suitable for LLC resonant converters, boost PFC stages, and industrial UPS inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical power systems.

Supply support for STF46N60M6 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

This device belongs to the MDmesh M6 superjunction MOSFET product line, engineered specifically for high-efficiency, high-frequency switched-mode power supplies targeting data center PSUs, telecom rectifiers, and industrial motor drives.

FAQ

What is the maximum recommended gate resistor value for reliable switching at 250 kHz?

A gate resistor of 4.7 Ω is validated in the datasheet for 250 kHz operation (td(on)/td(off) measured with RG = 4.7 Ω). Using >10 Ω increases switching time disproportionately due to low intrinsic R_G (1.6 Ω) and high Q_g (53.5 nC), risking excessive turn-on loss. For 250 kHz, 3.3–6.8 Ω provides optimal trade-off between EMI control and loss.

Can STF46N60M6 replace STF24NM60ND in an existing PFC design?

No - STF24NM60ND is a 600 V, 24 A, 150 mΩ MDmesh II device with different dynamic parameters (Q_g = 32 nC, C_oss = 1100 pF). STF46N60M6 has 50% higher current rating and 30% lower R_DS(on), but requires gate drive redesign due to higher Q_g and different Miller characteristics; layout and snubber adjustments are mandatory.

Is the TO-220FP package suitable for surface-mount reflow assembly?

No - TO-220FP is a through-hole package with bent leads intended for wave soldering or manual insertion. Its insulated tab and lead geometry are incompatible with standard SMT reflow profiles. ST offers equivalent MDmesh M6 devices in DPAK (e.g., STD46N60M6) for SMT applications.

Does the 100% avalanche test apply to repetitive or single-pulse conditions?

The 100% avalanche test is a single-pulse unclamped inductive switching (UIS) screen performed at I_AR = 5.2 A and E_AS = 760 mJ. Repetitive avalanche is not rated - the device must be operated within SOA limits (Figure 1) and protected by appropriate snubbers or clamps to avoid cumulative junction damage.