STMicroelectronics STP3NK60ZFP

Overview

STP3NK60ZFP from STMicroelectronics is a Zener-protected N-channel 600 V SuperMESH™ Power MOSFET in TO-220FP package, rated for 2.4 A continuous drain current at T_C = 25 °C, 3.2 Ω typical R_DS(on), and 4.5 V/ns peak diode recovery dv/dt capability. It serves as a high-voltage switching device in offline SMPS primary-side switches and AC-DC adapters.

For engineers reviewing the STP3NK60ZFP datasheet, STP3NK60ZFP pinout, STP3NK60ZFP application, or STP3NK60ZFP equivalent, key selection criteria include avalanche ruggedness (150 mJ E_AS), gate charge (11.8 nC), intrinsic capacitance (C_iss = 311 pF), thermal resistance (R_thj-case = 6.25 °C/W), and built-in gate-source Zener protection (±30 V).

Technical Context

This MOSFET employs ST's SuperMESH™ process to reduce on-resistance while maintaining high dv/dt immunity (4.5 V/ns) and robust unclamped inductive switching performance. Its integrated back-to-back gate-source Zener diodes eliminate need for external ESD protection components.

The device features 100% avalanche-tested ruggedness, low reverse transfer capacitance (C_rss = 8 pF), and fast switching times (t_d(off) = 19 ns, t_f = 14 ns) under 480 V/2.4 A conditions with 4.7 Ω gate resistor - enabling efficient high-frequency hard-switched topologies.

Key Specifications

Pinout & Package

TO-220FP package: insulated tab (no electrical connection to drain), 3-pin vertical mounting with bent leads for PCB through-hole insertion. Tab is electrically isolated per V_ISO = 2.5 kV RMS rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP3NK60ZFP, STP3NK60Z offers superior thermal performance but lacks isolation, while STD3NK60ZT4 enables SMT manufacturing at lower power levels - making STP3NK60ZFP the optimal choice for insulated, medium-power through-hole designs requiring safety certification.

Availability

STP3NK60ZFP is available at Aetrix Electronics and suitable for AC-DC adapters, offline LED drivers, and industrial flyback converters requiring stable component supply, long-term lifecycle assurance, and certified insulation performance.

Supply support for STP3NK60ZFP 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 since 1987.

This device belongs to ST's SuperMESH™ Power MOSFET product line, engineered specifically for high-efficiency, high-reliability offline switching applications where avalanche ruggedness, dv/dt immunity, and integrated protection are mandatory.

FAQ

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

The STP3NK60ZFP supports 1.51 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS2912 Rev 6. This derating reflects junction temperature limits (T_j ≤ 150 °C) and thermal resistance (R_thj-case = 6.25 °C/W). At ambient temperatures above 50 °C, forced airflow or heatsink sizing must ensure case temperature remains ≤100 °C to maintain rated current.

Does STP3NK60ZFP require an external gate resistor for stability?

Yes - a gate resistor (typically 4.7 Ω to 22 Ω) is required to dampen ringing caused by parasitic inductance and low C_rss (8 pF). Figure 15 and Table 6 in DS2912 specify switching time measurements using R_G = 4.7 Ω. Omitting it risks oscillation, shoot-through in half-bridge configurations, or gate driver overstress due to excessive peak current during turn-on.

Can STP3NK60ZFP replace STP3NK60Z in existing TO-220 footprints?

No - although both share identical pinout (G-D-S), the TO-220FP package has an insulated tab and different leadform (bent leads, shorter body). Mechanical interference will occur if mounted in a standard TO-220 socket or heatsink clamp designed for non-isolated TO-220. PCB footprint and mechanical mounting must be redesigned to accommodate TO-220FP's isolated tab and lead geometry.

Is the Zener protection sufficient for gate drive circuits without additional clamping?

Yes - the integrated ±30 V gate-source Zener diodes (Table 8, V_(BR)GSO = ±30 V) provide full protection against transients exceeding normal gate drive ranges. No external Zener or TVS is needed unless gate drive circuitry generates sustained overvoltage (>30 V) or exceeds ±10 µA leakage (IGSS spec). The Zener design eliminates discrete protection components in certified adapter designs.