STMicroelectronics STFU13N80K5

Overview

STFU13N80K5 from STMicroelectronics is an N-channel 800 V, 0.37 Ω typ. (0.45 Ω max), 12 A MDmesh™ K5 Power MOSFET in TO-220FP ultra narrow leads package, designed for high-voltage switching in offline SMPS and PFC stages with low conduction and switching losses.

For engineers reviewing the STFU13N80K5 datasheet, STFU13N80K5 pinout, STFU13N80K5 application, or STFU13N80K5 equivalent, key selection criteria include R_DS(on), Q_g (29 nC), avalanche energy rating (148 mJ), Zener-protected gate, and TO-220FP thermal resistance (R_thj-case = 3.57 °C/W).

Technical Context

This MOSFET employs ST's MDmesh™ K5 vertical superjunction technology to achieve industry-leading figure of merit (R_DS(on) × area) and ultra-low gate charge. Its 800 V V_(BR)DSS and 100% avalanche-tested construction support robust operation in unclamped inductive switching.

The integrated back-to-back gate-source Zener diodes (V_(BR)GSO = 30 V) provide ESD protection without external components. The device features low C_oss (50 pF) and Co(er) (43 pF), enabling high-frequency hard-switching efficiency in >100 kHz topologies.

Key Specifications

Pinout & Package

TO-220FP ultra narrow leads package: insulated case, single-row 3-pin through-hole mount, optimized for compact heatsink mounting and automated insertion. Pin 1 = Gate, Pin 2 = Drain (tab-connected), Pin 3 = Source.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STW12N80K5 and IPP60R190C7, STFU13N80K5 uniquely balances 800 V capability, TO-220FP compactness, and Zener-protected gate-making it optimal for cost-sensitive, space-constrained 300–800 W offline power supplies requiring no external gate protection.

Availability

STFU13N80K5 is available at Aetrix Electronics and suitable for industrial switched-mode power supplies, server rectifiers, EV onboard chargers, and high-voltage DC-DC converters requiring stable component supply and long-term production continuity.

Supply support for STFU13N80K5 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

This device belongs to ST's MDmesh™ K5 high-voltage power MOSFET product line, engineered specifically for high-efficiency, high-power-density offline power conversion in 800 V-class SMPS, PFC, and industrial motor drives.

FAQ

Is STFU13N80K5 suitable for zero-voltage switching (ZVS) topologies?

Yes. With low C_oss (50 pF), Co(er) (43 pF), and fast switching times (t_d(off) = 42 ns), STFU13N80K5 supports efficient ZVS operation in LLC resonant converters up to 300 kHz. Its 800 V rating ensures sufficient voltage margin during resonant voltage peaks.

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

The datasheet specifies I_D = 7.6 A at T_C = 100 °C, limited by package thermal constraints. This value assumes proper heatsinking and accounts for R_DS(on) increase with temperature (typical +0.5%/°C).

Does the built-in Zener protect against both positive and negative gate transients?

Yes. The back-to-back Zener configuration provides symmetrical ±30 V clamping (V_(BR)GSO = ±30 V), protecting against both positive gate overvoltage and negative gate swing during fast turn-off or Miller-induced coupling.

Can STFU13N80K5 replace older STP12NK80Z in existing designs?

Yes, with minor layout review. STFU13N80K5 offers lower R_DS(on) (0.45 Ω vs 0.63 Ω), lower Q_g (29 nC vs 45 nC), and Zener protection-improving efficiency and reliability. Pinout and package are identical (TO-220FP), enabling drop-in replacement.