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STMicroelectronics STB20NM50T4
STMicroelectronics

STB20NM50T4 N-Channel MOSFET, 550 V, 20 A, MDmesh™

MPNSTB20NM50T4
End of Life

STMicroelectronics MDmesh™ series, STB20NM50T4, N-Channel MOSFET, 550 Vdss, 20 A continuous drain, 250 mOhm Rds(on) at 10 V, 56 nC gate charge, D²Pak (TO-263) surface-mount package.

$5.71Ref. price · indicative, final on quote
STB20NM50T4 datasheet
PackagingTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
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Specifications

STB20NM50T4 Technical Specifications
ParameterValue
SeriesMDmesh™
FET typeN-Channel
Mounting typeSurface Mount
Drain to source voltage550 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C20A (Tc)
Power dissipation192W (Tc)
Operating temperature-65°C ~ 150°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
Vgs(th) (Max) @ id5V @ 250µA
Rds on (Max) @ id, vgs250mOhm @ 10A, 10V
Gate charge (Qg) (Max) @ vgs56 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1480 pF @ 25 V

Product details

The 56 nC total gate charge at 10 V means a 1 A gate driver can switch this FET in about 56 ns; a weaker driver extends the switching edges and increases crossover loss.

Gate drive and switching — the 56 nC number matters more than the Rds(on) in hard-switched designs

At 10 V gate drive the 56 nC gate charge is modest for a 550 V / 20 A device — it keeps the driver stage simple and the switching losses predictable in a 100 kHz PFC or flyback. The 1480 pF input capacitance at 25 V drain bias is a sanity check for the driver's peak current capability; a 1 A driver charges it in roughly 1.5 µs. The ±30 V maximum gate rating gives headroom for ringing on the gate node without an external clamp zener in most layouts.

Package and thermal — the D²Pak tab is the primary heat path

The surface-mount package suits automated assembly but requires a reflow profile compatible with the lead-free solder (ROHS3 compliant).

It is ROHS3 compliant.

Frequently asked questions

What is the Rds(on) of STB20NM50T4?

The maximum on-resistance is 250 mOhm at 10 A drain current with 10 V gate drive. This is the conduction loss figure to use for thermal calculations at the rated operating point.