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STMicroelectronics STD5N65M6 — Discrete Semiconductors

STD5N65M6 N-Channel MOSFET, 650 V, 4 A, DPAK

MPNSTD5N65M6
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STMicroelectronics MDmesh™ M6 series, STD5N65M6, N-Channel MOSFET, 650 V Vdss, 4 A Id, 1.3 Ohm Rds(on), 5.1 nC Qg, DPAK surface mount, -55°C to 150°C Tj.

$0.7921Ref. price · indicative, final on quote
STMicroelectronics STD5N65M6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STD5N65M6 specifications
ParameterValue
SeriesMDmesh™ M6
FET typeN-Channel
MountingSurface Mount
Drain to source voltage650 V
Drive voltage (Max rds on, min rds on)0V, 10V
Current - continuous drain (Id) @ 25°C4A (Tc)
Power dissipation45W (Tc)
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR)
Vgs±25V
TechnologyMOSFET (Metal Oxide)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vgs(th) (Max) @ id3.75V @ 250µA
Rds on (Max) @ id, vgs1.3Ohm @ 2A, 10V
Gate charge (Qg) (Max) @ vgs5.1 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds170 pF @ 100 V

Product details

650 V N-channel in a DPAK — where it fits

The 650 V rating targets offline AC-DC converters, flyback power supplies, and PFC stages where the primary-side switch sees rectified line voltage plus reflected output and leakage-inductance spikes. The MDmesh M6 process keeps the gate charge low at 5.1 nC at 10 V, which reduces the drive power and switching losses in hard-switched topologies.

Maximum on-resistance is 1.3 Ohm at 2 A with 10 V gate drive. The 5.1 nC gate charge means a small-signal gate driver can switch the FET without a dedicated driver IC, saving a line item on the BOM.

The ±25 V maximum gate-source rating gives margin for gate-drive ringing in noisy environments — a common failure point in offline designs.

Frequently asked questions

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What is the price of STD5N65M6?

Pricing directly impacts BOM cost and budget planning for sourcing buyers.

Is STD5N65M6 obsolete or still in production?

Lifecycle status determines long-term availability and risk of redesign for the product.

What is the equivalent or replacement for STD5N65M6?

Designers and maintenance techs need drop-in alternatives when the original is unavailable or end of life.

What are the key specifications of STD5N65M6?

Design engineers must verify that the part meets electrical and thermal requirements for their application.

What is the package type of STD5N65M6?

Package compatibility is essential for PCB layout and mechanical fit, especially for maintenance replacements.