The STF7N65M2 is an N‑channel Power MOSFET developed by STMicroelectronics using the advanced MDmesh™ M2 technology . This technology combines a strip layout with an improved vertical structure, resulting in both low on-resistance and optimized switching characteristics, making it suitable for demanding high-efficiency converters .

The device features a 650V drain-source breakdown voltage and can handle 5A of continuous drain current, with a typical on-resistance of just 0.98Ω . The extremely low gate charge of 9nC and low input capacitance (270pF) enable fast switching operation with reduced driving losses .

Key built‑in protections include 100% avalanche testing to ensure ruggedness against voltage transients, and Zener‑protected gate circuitry to enhance reliability . The TO-220FP (Full Pack) package features a fully molded, isolated case, which simplifies heat sink installation as no insulating washers are required.

The “F” in the part number indicates the TO‑220FP (Full Pack) package, which is electrically isolated. For other package variants, STMicroelectronics offers:

STP7N65M2 – TO-220 (non‑isolated)
STU7N65M2 – IPAK (TO‑251)
STD7N65M2 – DPAK (TO‑252) surface mount

Parameters

Parameters	Specifications
Manufacturer	STMicroelectronics
Part Number	STF7N65M2
FET Type	N-Channel Enhancement Mode
Technology	MDmesh™ M2
Drain-Source Voltage (Vdss)	650V
Continuous Drain Current (Id) @ 25°C	5A
Pulsed Drain Current (Idm)	20A
Gate-Source Voltage (Vgs) Max	±25V
On-Resistance Rds(on) Typ	0.98Ω @ Vgs=10V, Id=2.5A
On-Resistance Rds(on) Max	1.15Ω @ Vgs=10V, Id=2.5A
Gate Threshold Voltage Vgs(th)	2V – 4V (typical 3V)
Total Gate Charge (Qg)	9nC @ Vgs=10V
Input Capacitance (Ciss)	270pF @ Vds=100V
Output Capacitance (Coss)	33pF (typical)
Reverse Transfer Capacitance (Crss)	0.8pF @ Vds=100V
Power Dissipation (Pd)	20W
Operating Junction Temperature	-55°C to +150°C
Package Type	TO‑220FP (Full Pack / Isolated)
Mounting Type	Through Hole
RoHS Compliant	Yes

Applications

Switching Power Supplies (SMPS) – High-efficiency AC-DC converters for consumer and industrial electronics
LED Lighting Drivers – Offline (non‑isolated and isolated) LED power supplies, particularly suitable for offline lighting applications requiring 650V rating
Home Appliances – Auxiliary power supplies for refrigerators, washing machines, air conditioners, and other household electronics
Battery Chargers – High-voltage switching stages for battery charging circuits
Adapter Power Supplies – High‑efficiency power adapters for laptops, monitors, and other peripherals
Industrial Power Supplies – Small to medium power industrial converters and auxiliary power units
Flyback Converters – Primary-side switching in flyback topologies commonly used in low‑to‑medium power offline applications

Note: The TO‑220FP (Full Pack) package is electrically isolated, which eliminates the need for insulating hardware when mounting to a heat sink. For surface‑mount designs, consider the STD7N65M2 (DPAK package) variant.