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STMicroelectronics STPS41L45CG-TR — Discrete Semiconductors

STPS41L45CG-TR Schottky Rectifier

MPNSTPS41L45CG-TR
End of Life

STMicroelectronics STPS41L45CG-TR Schottky rectifier, 45 V reverse voltage, 20 A average rectified current per diode, 530 mV forward voltage at 20 A, dual common-cathode configuration, D2PAK surface-mount package.

$2.3000Ref. price · indicative, final on quote
STMicroelectronics STPS41L45CG-TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STPS41L45CG-TR specifications
ParameterValue
MountingSurface Mount
Voltage - DC reverse (Vr)45 V
Voltage - forward (Vf) (Max) @ if530 mV @ 20 A
Current - reverse leakage @ vr1.2 mA @ 45 V
Current - average rectified (Io) (per diode)20A
Operating temperature - junction150°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR) Cut Tape (CT)
TechnologySchottky
ManufacturerSTMicroelectronics
CaseTO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Diode configuration1 Pair Common Cathode

Product details

What this Schottky pair delivers on the rail

The STPS41L45CG-TR from STMicroelectronics is a dual Schottky rectifier in a common-cathode configuration, housed in a D2PAK (TO-263) surface-mount package. Each diode handles 20 A of average rectified current with a forward voltage drop of 530 mV at that current, keeping conduction losses manageable in power supply output stages and OR-ing circuits.

At 20 A per diode, the 530 mV forward drop produces about 10.6 W of dissipation per diode. In a common-cathode pair running 40 A total, that is over 21 W in the package. Without adequate thermal management, the part will hit thermal shutdown or exceed the junction rating under sustained full load.

D2PAK rework and mounting notes

The D2PAK (TO-263-3) is a surface-mount package with a large exposed tab on the bottom. It reflows well with a standard lead-free profile, but the tab's thermal mass means the hot-air station needs a few extra seconds to get the solder fully liquid. The package has a clear orientation notch.

For BOM planning, this is a low-risk line item — no last-time-buy pressure, no forced redesign to a substitute.

Frequently asked questions

What is the closest pin-compatible alternative to STPS41L45CG-TR?

The STPS41L45CG (non-tape-and-reel variant) is the same die in the same D2PAK package — the -TR suffix indicates Tape & Reel packaging only. For a functional equivalent from another manufacturer, look for a 45 V, 20 A dual common-cathode Schottky in D2PAK, but verify the forward voltage and reverse leakage match your thermal and efficiency targets.

Does STPS41L45CG-TR require a heatsink?

At 20 A per diode, the 530 mV forward drop generates about 10.6 W per diode. Whether a heatsink is needed depends on the PCB copper area, ambient temperature, and allowable junction temperature rise to the 150°C maximum. In many designs, the D2PAK's tab soldered to a large copper pour on the PCB is sufficient; sustained full load may call for an additional heatsink attached to the tab.