STMicroelectronics STF15N80K5

Overview

STF15N80K5 from STMicroelectronics is an N-channel 800 V, 375 mΩ (max) high-voltage power MOSFET in TO-220FP package, designed for high-efficiency switching applications requiring ultra-low gate charge (32 nC), Zener-protected gate, and 100% avalanche tested ruggedness. It delivers 14 A continuous drain current at T_C = 25 °C and supports fast switching in offline SMPS, PFC stages, and industrial motor drives.

For engineers reviewing the STF15N80K5 datasheet, STF15N80K5 pinout, STF15N80K5 application, or STF15N80K5 equivalent, key selection criteria include its 800 V breakdown voltage, 32 nC total gate charge, 1.5 V source-drain forward voltage, 445 ns reverse recovery time, and thermal resistance of 3.6 °C/W (junction-to-case) - all critical for high-reliability high-voltage power conversion design.

Technical Context

This MDmesh K5 technology MOSFET uses a proprietary vertical structure to achieve ultra-low R_DS(on) and figure-of-merit (FoM), enabling superior power density in hard-switched topologies. Its Zener-protected gate ensures ±30 V V_GS robustness, while 100% unclamped inductive avalanche testing (E_AS = 150 mJ at T_J = 25 °C) validates ruggedness under transient overloads.

The device features low output capacitance (C_oss = 85 pF) and reverse transfer capacitance (C_rss = 1.5 pF), supporting high dv/dt immunity (4.5 V/ns) and reduced switching losses. Its integrated body diode exhibits 14 A continuous source-drain current and 37 A peak reverse recovery current, suitable for synchronous rectification and freewheeling roles in bridge configurations.

Key Specifications

Pinout & Package

STF15N80K5 is housed in a TO-220FP (Full-Pak) package with insulated flange, offering enhanced creepage and isolation for high-voltage mounting without additional insulators. The plastic body provides electrical isolation between the drain-connected tab and PCB mount surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP15N80K5 and STW15N80K5, STF15N80K5 trades thermal performance for reinforced insulation and compact form factor - making it optimal for space-constrained, safety-critical AC/DC adapters and medical-grade power supplies where creepage and isolation compliance are mandatory.

Availability

STF15N80K5 is available at Aetrix Electronics and suitable for industrial motor drives, server SMPS, photovoltaic inverters, and induction heating systems requiring stable component supply across multi-year production cycles.

Supply support for STF15N80K5 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, digital, and mixed-signal ICs for automotive, industrial, and power applications.

STF15N80K5 belongs to the MDmesh K5 high-voltage MOSFET product line, engineered specifically for high-efficiency, high-density offline power conversion - emphasizing low FoM, avalanche ruggedness, and system-level reliability in harsh environments.

FAQ

What is the maximum safe operating voltage for STF15N80K5 in continuous DC blocking?

The absolute maximum drain-source voltage (V_(BR)DSS) is 800 V at T_J = 25 °C, with derating to ~720 V at T_J = 150 °C per Figure 16. For reliable long-term operation, ST recommends limiting steady-state V_DS to ≤ 640 V (80% of rating) to maintain margin against transients and temperature drift.

Does STF15N80K5 require external gate protection?

No - STF15N80K5 integrates a gate-source Zener diode rated for ±30 V, providing built-in protection against ESD and gate overvoltage. External gate resistors (e.g., 10–47 Ω) are still recommended to dampen ringing, but discrete TVS or Zener clamps are unnecessary under normal operating conditions.

How does the TO-220FP package affect thermal design compared to standard TO-220?

The TO-220FP features a fully insulated flange, eliminating need for mica washers or silicone pads. However, its R_thJC is 3.6 °C/W - over 5× higher than TO-220's 0.66 °C/W - due to plastic isolation layer. This mandates careful heatsink sizing and limits continuous power to ~35 W unless ambient temperature is tightly controlled.

Can STF15N80K5 replace STP15N80K5 in existing PCB layouts?

No - STF15N80K5 (TO-220FP) and STP15N80K5 (TO-220) share identical pinout (G-D-S), but TO-220FP has longer leads, different lead spacing, and a taller profile. Mechanical interference and solder joint reliability will be compromised without PCB footprint revision; thermal and isolation benefits do not offset layout incompatibility.