Skip to main content
Log in
STMicroelectronics STPS3045CW — Discrete Semiconductors

STPS3045CW Schottky Diode, 45V 15A Common Cathode TO-247-3

MPNSTPS3045CW
Active

STMicroelectronics STPS3045CW Schottky rectifier, 45 V reverse voltage, 15 A average rectified current per diode, 570 mV forward voltage at 15 A, 1 pair common cathode, TO-247-3 through-hole package.

$1.6500Ref. price · indicative, final on quote
STMicroelectronics STPS3045CW datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STPS3045CW specifications
ParameterValue
MountingThrough Hole
Voltage - DC reverse (Vr)45 V
Voltage - forward (Vf) (Max) @ if570 mV @ 15 A
Current - reverse leakage @ vr200 µA @ 45 V
Current - average rectified (Io) (per diode)15A
Operating temperature - junction200°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologySchottky
CaseTO-247-3
Diode configuration1 Pair Common Cathode

Product details

Common-cathode Schottky pair for 45 V rails

The 570 mV forward voltage at 15 A sets the conduction loss that drives the heatsink selection. The TO-247-3 through-hole package handles the thermal mass for continuous operation up to 200°C junction temperature.

Conduction loss and heatsink sizing

At 15 A forward current the typical Vf is 570 mV, which means each diode dissipates about 8.6 W in conduction alone. For a 30 A total load (15 A per leg) the pair dissipates ~17 W — the TO-247 tab needs a heatsink with a thermal resistance low enough to keep the junction below 200°C at the expected ambient. The 200 µA reverse leakage at 45 V is a secondary contributor to self-heating, but it rises with temperature and should be factored into the thermal budget at high ambients.

Package and mounting note

The common-cathode configuration means the two cathodes are internally tied to the tab — the tab is electrically live at the cathode potential, so an insulating pad or thermal interface material is required if the heatsink is grounded.

Frequently asked questions

What is the closest pin-compatible alternative to STPS3045CW in this component family?

The STPS3045CW is part of the STPS3045 base number family. The STPS3045C variant shares the same 45 V / 15 A per diode ratings but differs in package — the STPS3045C typically comes in a TO-220AB package. The TO-247-3 package of the STPS3045CW offers a larger tab area for better thermal dissipation than the TO-220AB.

What is STPS3045CW's listed speed on this component line?

The STPS3045CW is listed as a Fast Recovery Schottky diode with a recovery time of ≤ 500 ns at forward current > 200 mA. This is typical for a Schottky barrier device — the fast recovery characteristic is inherent to the Schottky junction and suits high-frequency rectification and freewheeling diode applications.