STMicroelectronics STF2HNK60Z

Overview

STF2HNK60Z from STMicroelectronics is a Zener-protected N-channel SuperMESH Power MOSFET in TO-220FP package, rated for 600 V drain-source voltage, 4.8 Ω max R_DS(on) at 10 V_GS, and 2 A continuous drain current at T_C = 25 °C. It delivers high dv/dt capability (4.5 V/ns), 100% avalanche tested performance (E_AS = 120 mJ), and low intrinsic capacitance (C_iss = 280 pF), enabling robust switching in offline SMPS and AC-DC adapters.

For engineers reviewing the STF2HNK60Z datasheet, STF2HNK60Z pinout, STF2HNK60Z application, or STF2HNK60Z equivalent, key selection criteria include its Zener-protected gate, 2.5 kV insulation withstand voltage, 6.25 °C/W junction-to-case thermal resistance, and verified unclamped inductive switching behavior under 480 V conditions.

Technical Context

This device implements ST's SuperMESH process - an evolution of PowerMESH - to reduce on-resistance while maintaining high-voltage ruggedness. Its Zener-protected gate structure (±30 V_GS rating, 2 kV HBM ESD) enables reliable operation without external gate protection in noisy environments.

The MOSFET features low dynamic parameters: Q_g = 11–15 nC, Q_gd = 6 nC, and C_oss,eq = 30 pF, supporting efficient high-frequency switching up to several hundred kHz. Its source-drain diode exhibits t_rr = 178 ns and Q_rr = 445 nC at 25 °C, with controlled recovery characteristics critical for reducing switching losses in flyback and resonant topologies.

Key Specifications

Pinout & Package

STF2HNK60Z uses the TO-220FP (Full-Pak) package: insulated plastic case with integral heatsink tab, 3-pin vertical lead configuration, and creepage/clearance optimized for high-voltage safety compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP2NK60Z and FQP2N60, STF2HNK60Z provides certified insulation, guaranteed avalanche energy, and integrated gate protection - making it the only choice for safety-critical, high-reliability offline power designs requiring minimal external components and regulatory-ready layout.

Availability

STF2HNK60Z is available at Aetrix Electronics and suitable for AC-DC adapters, industrial PLC auxiliary supplies, and white goods motor control pre-drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp-up.

Supply support for STF2HNK60Z 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

STF2HNK60Z belongs to ST's SuperMESH Power MOSFET product line, engineered specifically for high-efficiency, high-reliability offline switching power supplies where ruggedness, low EMI, and minimal external protection are critical design goals.

FAQ

Is STF2HNK60Z suitable for use in continuous conduction mode (CCM) PFC circuits?

No - STF2HNK60Z is optimized for DCM and QR flyback topologies, not CCM PFC. Its 2 A continuous current rating and thermal resistance (R_thJC = 6.25 °C/W) limit usable power in high-duty-cycle, high-current PFC stages. For CCM PFC, ST recommends devices like STL10DN60M2 with higher I_D and lower R_DS(on).

What is the maximum recommended gate resistor value for reliable switching at 100 kHz?

A gate resistor of ≤ 10 Ω is recommended for 100 kHz operation. With Q_g = 15 nC max and typical driver output impedance < 2 Ω, a 10 Ω resistor limits turn-on time to < 150 ns, preserving switching speed while damping ringing. Higher values increase switching losses and risk incomplete turn-on during short pulses.

Does the TO-220FP package require thermal compound when mounted to an aluminum heatsink?

Yes - despite the insulated tab, thermal interface material (TIM) is mandatory between the TO-220FP metal tab and heatsink. The plastic housing has high thermal resistance; TIM reduces junction-to-heatsink thermal impedance by >50%, preventing thermal runaway at I_D > 1.2 A continuous.

Can STF2HNK60Z replace STP2NK60Z in an existing design without layout changes?

No - although electrically identical, STF2HNK60Z's TO-220FP package has different pin pitch (2.54 mm vs. STP2NK60Z's 5.08 mm) and tab geometry. PCB footprint, heatsink cutout, and mounting hole positions must be revised to accommodate the Full-Pak outline and ensure proper creepage clearance per IEC 62368-1.