STMicroelectronics STU1HN60K3

Overview

STU1HN60K3 from STMicroelectronics is an N-channel 600 V, 6.7 Ω typ. (at V_GS = 10 V, I_D = 0.6 A), 1.2 A SuperMESH3™ Power MOSFET in IPAK (TO-251) package, featuring 100% avalanche tested ruggedness, 5 V/ns peak diode recovery dv/dt capability, and integrated gate-source Zener protection at ±30 V. It serves as a high-voltage switching element in offline AC-DC adapters and auxiliary power supplies.

For engineers reviewing the STU1HN60K3 datasheet, STU1HN60K3 pinout, STU1HN60K3 application, or STU1HN60K3 equivalent, key selection criteria include its 600 V V_DS, low 9.5 nC total gate charge, 180 ns reverse recovery time (T_J = 25 °C), 60 mJ single-pulse avalanche energy, and Zener-protected gate enabling robust gate drive in noisy industrial environments.

Technical Context

This device employs ST's SuperMESH3™ vertical structure with optimized cell layout to achieve ultra-low R_DS(on) while maintaining high voltage blocking and fast switching. Its internal Zener diodes clamp gate-source voltage to ±30 V, eliminating need for external TVS protection in flyback or PFC stages.

The MOSFET exhibits enhanced diode reverse recovery characteristics (Q_rr = 500 nC, I_RRM = 5.6 A) and low output capacitance (C_oss = 13 pF), supporting high-frequency operation up to 100 kHz in quasi-resonant converters without excessive switching loss.

Key Specifications

Pinout & Package

STU1HN60K3 is housed in IPAK (TO-251) package with exposed drain tab for thermal dissipation. The package features three leads: Gate (G), Drain (D), Source (S), with Drain connected to the metal tab for low-inductance high-current path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STD1HN60K3, STU1HN60K3 offers identical electrical performance in a lower-profile IPAK package ideal for height-constrained designs, while FQP1N60 trades ruggedness and protection for lower gate charge and cost-making it unsuitable for industrial environments requiring guaranteed avalanche survival.

Availability

STU1HN60K3 is available at Aetrix Electronics and suitable for offline AC-DC adapters, industrial auxiliary power supplies, and smart meter power management requiring stable component supply across extended production lifecycles.

Supply support for STU1HN60K3 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 industrial, automotive, and consumer markets.

STU1HN60K3 belongs to the SuperMESH3™ Power MOSFET product line, engineered specifically for high-efficiency, high-reliability offline switching applications where avalanche ruggedness, low gate charge, and integrated protection are mandatory.

FAQ

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

The STU1HN60K3 supports 0.76 A continuous drain current at T_C = 100 °C, as specified in Table 2 of the datasheet. This derating reflects thermal limits of the IPAK package and must be respected in thermally constrained layouts without forced airflow or heatsinking.

Does STU1HN60K3 require external gate protection?

No. The device integrates back-to-back Zener diodes between gate and source with ±30 V breakdown voltage (V_(BR)GSO), providing full gate overvoltage protection without external components-confirmed in Table 8 and Section 2.1 of the datasheet.

Can STU1HN60K3 replace STD1HN60K3 in existing designs?

Yes, electrically identical-same V_DS, R_DS(on), Q_g, and avalanche rating-but mechanical replacement requires verifying IPAK footprint compatibility, thermal pad clearance, and mounting height constraints versus DPAK.

What is the safe operating area (SOA) limitation at 100 µs pulse width?

At 100 µs pulse width and T_C = 25 °C, the SOA is limited by R_DS(on) to approximately 1.2 A at 300 V (per Figure 2), meaning it can safely switch 360 W pulses without secondary breakdown-critical for relay driving and PFC precharge circuits.