STMicroelectronics STFI10N65K3

Overview

STF10N65K3 from STMicroelectronics is an N-channel 650 V, 0.75 Ω typ., 10 A MDmesh K3 Power MOSFET in TO-220FP package, designed for high-voltage switching in SMPS, PFC stages, and industrial inverters. It delivers 12 V/ns dv/dt capability, 212 mJ single-pulse avalanche energy, and Zener-protected gate.

For engineers reviewing the STF10N65K3 datasheet, STF10N65K3 pinout, STF10N65K3 application, or STF10N65K3 equivalent, key selection criteria include R_DS(on) stability over temperature, low C_iss/C_oss ratio for hard-switching efficiency, diode reverse recovery time (320 ns), and TO-220FP thermal resistance (R_thJC = 3.57 °C/W).

Technical Context

This MDmesh K3 device employs a vertically optimized structure to reduce specific on-resistance while maintaining high voltage blocking. Its 14 pF Crss and 77 pF Coss_eq enable fast, low-loss switching in continuous conduction mode (CCM) PFC and resonant LLC topologies.

The integrated Zener-protected gate withstands ±30 V stress, and its 1.5 V source-drain forward voltage at 7 A supports synchronous rectification replacement in flyback converters. Avalanche ruggedness (7.2 A repetitive I_AR) ensures reliability under unclamped inductive load conditions.

Key Specifications

Pinout & Package

TO-220FP (Type B) package with insulated tab: 3-pin through-hole outline, 10.4 mm height, 30.6 mm length, and 2.75 mm lead width. Tab is electrically connected to drain.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP10N65K3, STF10N65K3 provides built-in isolation for simplified thermal design; versus IPP65R190CFD7, it trades some conduction efficiency for superior ruggedness, integrated protection, and lower system-level BOM count.

Availability

STF10N65K3 is available at Aetrix Electronics and suitable for industrial SMPS, server PSU PFC, and UPS output stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STF10N65K3 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.

The MDmesh K3 product line targets high-efficiency, high-reliability power conversion systems-specifically engineered for 650 V hard-switched and resonant topologies where avalanche ruggedness and dynamic parameter consistency are critical.

FAQ

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

The STF10N65K3 supports 6.3 A continuous drain current at T_C = 100 °C, as specified in Table 1 of DS6285 Rev 5. This derating reflects thermal limits of the TO-220FP package and ensures safe operation within SOA boundaries up to 1 ms pulse width.

Does the device include internal gate protection?

Yes-the STF10N65K3 integrates a Zener diode between gate and source, providing ±30 V gate-source voltage clamping. This eliminates the need for external gate protection components in most applications, including those with fast dv/dt transients or inductive gate loops.

Can STF10N65K3 replace STP10N65K3 in existing designs?

Electrically yes, but mechanically no-STF10N65K3 uses an insulated TO-220FP tab (drain isolated from heatsink), whereas STP10N65K3's TO-220 tab is electrically connected to drain. Replacement requires verifying heatsink isolation and creepage/clearance compliance before implementation.

What is the typical reverse recovery charge (Q_rr) at 150 °C junction temperature?

At T_J = 150 °C, Q_rr increases to 2.9 µC (Table 7, DS6285 Rev 5), reflecting higher carrier lifetime in the body diode. This value must be used for worst-case EMI and loss calculations in high-temperature industrial environments.