STMicroelectronics STF23N80K5

Overview

STF23N80K5 from STMicroelectronics is an 800 V, 16 A N-channel Power MOSFET in TO-220FP package, fabricated with MDmesh K5 vertical structure technology. It delivers 230 mΩ typ. R_DS(on), 33 nC total gate charge, and 400 mJ single-pulse avalanche energy-enabling high-efficiency, high-density switch-mode power supplies and industrial motor drives.

For engineers reviewing the STF23N80K5 datasheet, STF23N80K5 pinout, STF23N80K5 application, or STF23N80K5 equivalent, key selection criteria include its 2.5 kV insulation withstand voltage, 50 V/ns MOSFET dv/dt ruggedness, Zener-protected gate, and 100% avalanche-tested reliability for high-voltage hard-switching topologies.

Technical Context

This device employs ST's MDmesh K5 proprietary vertical superjunction architecture to simultaneously minimize conduction loss (R_DS(on) = 230 mΩ typ.) and switching loss (Q_g = 33 nC, C_iss = 1000 pF). Its ultra-low figure of merit (FoM = R_DS(on) × Q_g ≈ 7.6 nC·Ω) targets efficiency-critical 600–800 V applications.

The integrated source-drain diode features 410 ns typical reverse recovery time (T_J = 25 °C) and 7 µC Q_rr, while the 2.5 kV isolation rating enables direct mounting on insulated heat sinks without additional barriers-critical for compact, high-reliability AC-DC front-ends and UPS systems.

Key Specifications

Pinout & Package

TO-220FP (Full-Pak) package: insulated case, vertical lead frame, single-side heat dissipation. Mounts directly to heatsink via backside metal tab; no insulator required due to 2.5 kV isolation rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STW20N80K5 and IPP60R190C7, STF23N80K5 uniquely balances 800 V capability, TO-220FP insulation, and Zener protection-making it optimal for space-constrained, high-reliability 650–800 V AC-DC converters where safety certification and component count reduction are critical.

Availability

STF23N80K5 is available at Aetrix Electronics and suitable for industrial motor drives, server power supplies, uninterruptible power supplies, and EV charging stations requiring stable component supply and long-term design-in support.

Supply support for STF23N80K5 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.

The MDmesh K5 product line targets high-efficiency, high-voltage power conversion-designed specifically for 600–900 V industrial, telecom, and renewable energy applications demanding low R_DS(on), low Q_g, and rugged avalanche performance.

FAQ

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

The STF23N80K5 supports 10 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS11241. This derating from 16 A at 25 °C reflects thermal limitations of the TO-220FP package, with R_thJC = 3.6 °C/W defining the junction-to-case thermal path.

Does this MOSFET require external gate protection?

No. The STF23N80K5 integrates a Zener diode between gate and source, providing ±30 V clamping. This eliminates the need for external gate protection components in standard gate-drive circuits, reducing BOM count and PCB area while maintaining robustness against ESD and transient overvoltage.

Can STF23N80K5 be used in avalanche mode during normal operation?

Yes-every unit is 100% tested for single-pulse avalanche energy (E_AS = 400 mJ at T_J = 25 °C). While not intended for continuous avalanche operation, it safely absorbs inductive energy spikes during hard-switching faults or unclamped inductive load transitions without degradation.

How does the TO-220FP package differ from standard TO-220 in thermal performance?

The TO-220FP (Full-Pak) variant features an insulated metal tab rated for 2.5 kV RMS, enabling direct heatsink mounting without insulating washers. Its R_thJC = 3.6 °C/W matches standard TO-220, but eliminates thermal interface resistance from insulators-yielding up to 0.8 °C/W net improvement in system-level thermal resistance.