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STMicroelectronics STP45N65M5 — Discrete Semiconductors

STP45N65M5 N-Channel MOSFET, 650 V, 35 A, TO-220

MPNSTP45N65M5
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STMicroelectronics STP45N65M5, N-Channel MOSFET, MDmesh™ V series, 650 V Vdss, 35 A Id, 78 mOhm Rds(on) at 10 V, 91 nC Qg, TO-220-3, Through Hole.

$8.7000Ref. price · indicative, final on quote
STMicroelectronics STP45N65M5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STP45N65M5 specifications
ParameterValue
SeriesMDmesh™ V
FET typeN-Channel
MountingThrough Hole
Drain to source voltage650 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C35A (Tc)
Power dissipation210W (Tc)
Operating temperature150°C(TJ)
PackageTube
Vgs±25V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id5V @ 250µA
Rds on (Max) @ id, vgs78mOhm @ 19.5A, 10V
Gate charge (Qg) (Max) @ vgs91 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds3375 pF @ 100 V

Product details

650 V, 35 A N-Channel MOSFET in TO-220 — STP45N65M5

The through-hole TO-220-3 package suits conventional heatsink mounting and wave-solder assembly.

On-resistance and gate charge — the switching loss trade-off

Thermal budget and mounting

Maximum power dissipation is 210 W at the case temperature, so a properly sized heatsink is non-negotiable at high load. The junction temperature rating of 150 °C defines the derating curve. The TO-220 package with a metal tab requires a thermal pad or mica insulator and a dab of thermal compound for good heat transfer to the heatsink. Through-hole mounting means the leads carry the mechanical load — no additional support needed for most board weights.

Gate drive and threshold

The maximum gate threshold voltage is 5 V at 250 µA drain current, and the recommended drive voltage for minimum on-resistance is 10 V. A 12 V gate drive rail is the typical choice; the absolute maximum gate-to-source voltage is ±25 V, so a 15 V zener clamp on the gate is optional but not required with a clean 12 V supply.

Frequently asked questions

Is STP45N65M5 equivalent to STW45N65M5 or other parts?

The STW45N65M5 is the same die in a TO-247 package — electrically identical but with a larger package that offers lower thermal resistance and higher power dissipation. For a TO-220 replacement, the STP45N65M5 is the direct through-hole variant. No other pin-compatible equivalent is listed in the official cross-reference, but the MDmesh V family includes several 650 V TO-220 parts with different current and Rds(on) ratings that can be evaluated as alternates.