STMicroelectronics STP46NF30

Overview

STP46NF30 from STMicroelectronics is an automotive-grade N-channel enhancement-mode Power MOSFET in TO-220 package, rated for 300 V drain-source voltage, 75 mΩ maximum R_DS(on) at V_GS = 10 V and I_D = 17 A, and 42 A continuous drain current at T_C = 25 °C. It serves as a high-voltage primary-side switch in isolated DC-DC converters for telecom power supplies and industrial SMPS.

For engineers reviewing the STP46NF30 datasheet, STP46NF30 pinout, STP46NF30 application, or STP46NF30 equivalent, key selection criteria include its 100% avalanche-tested ruggedness, 10 V/ns dv/dt capability, 90 nC total gate charge, 175 °C max junction temperature, and AEC-Q101 qualification for automotive power systems.

Technical Context

This device employs ST's STripFET II process to minimize input capacitance (C_iss = 3200 pF) and gate charge-critical for high-frequency switching efficiency in hard-switched topologies. Its low R_DS(on) and robust body diode (t_rr = 215 ns, Q_rr = 1.7 µC) support fast recovery in flyback and resonant converter designs.

The MOSFET features a fully rated 300 V breakdown voltage (V_(BR)DSS), ±20 V gate-source voltage tolerance, and thermal resistance R_thJC = 0.5 °C/W-enabling high-power operation with minimal heatsink requirements in compact TO-220 form factor.

Key Specifications

Pinout & Package

STP46NF30 is housed in a TO-220 package with isolated tab (drain-connected). The package provides mechanical robustness, standardized mounting, and direct heatsink interface for high-power dissipation up to 300 W at T_C = 25 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STW46NF30 and IPP60R099C7, STP46NF30 offers optimal balance of automotive qualification, TO-220 manufacturability, and 300 V/42 A capability-making it preferred for cost-sensitive, volume automotive and telecom power designs where package standardization and qualification outweigh marginal thermal or voltage advantages.

Availability

STP46NF30 is available at Aetrix Electronics and suitable for telecom AC-DC rectification, industrial SMPS primary switching, and automotive on-board charger (OBC) designs requiring stable component supply across multi-year production cycles.

Supply support for STP46NF30 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, sensors, and automotive ICs with vertical manufacturing and broad IP portfolio.

STP46NF30 belongs to the STripFET II Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in automotive, telecom, and industrial power conversion systems demanding ruggedness and consistent parametric performance.

FAQ

Is STP46NF30 pin-compatible with STB46NF30 or STW46NF30?

No-STP46NF30 uses TO-220 package with G-D-S pinout (1-2-3), STB46NF30 uses D²PAK (TO-263) with G-S-D pinout (1-3-2), and STW46NF30 uses TO-247 with G-D-S pinout (1-2-3) but different lead spacing and tab geometry. Mechanical and thermal mounting differ significantly; PCB layout and heatsink interface are not interchangeable.

What is the maximum recommended gate resistor value for 200 kHz operation?

For reliable 200 kHz switching with <10 ns rise/fall control, gate resistor should be ≤10 Ω when driven by a 2 A peak gate driver (e.g., IRS2186). At 90 nC Q_g, this limits turn-on time to ~900 ns and ensures adequate Miller immunity without excessive driver power dissipation.

Does STP46NF30 require a negative gate turn-off voltage?

No-STP46NF30 operates reliably with 0 V turn-off and +10 V turn-on. Its V_GS(th) range (2–4 V) and low C_iss/C_rss ratio prevent false triggering; negative bias is unnecessary unless operating in extreme dv/dt environments (>15 V/ns) with long gate traces.

Can STP46NF30 replace IRFP460 in existing designs?

Yes-with caveats: both are 500 V-rated TO-247 devices, but STP46NF30 is 300 V-rated and TO-220. Direct replacement is unsafe in 400 V bus applications. For 300 V systems, STP46NF30 offers lower R_DS(on) (75 mΩ vs. 270 mΩ) and Q_g (90 nC vs. 140 nC), but requires PCB rework for TO-220 footprint and revised thermal design.