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STMicroelectronics STPS20L45CT — Discrete Semiconductors

STPS20L45CT Schottky Diode Array, 45V 10A per Diode, TO-220

MPNSTPS20L45CT
Obsolete

STMicroelectronics STPS20L45CT, Schottky diode array, 1 pair common cathode, 45 V DC reverse, 10 A average rectified per diode, 550 mV forward drop at 10 A, TO-220-3 through-hole package.

$1.7100Ref. price · indicative, final on quote
STMicroelectronics STPS20L45CT datasheet (PDF)
PackagingTO-220-3
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS20L45CT specifications
ParameterValue
MountingThrough Hole
Voltage - DC reverse (Vr)45 V
Voltage - forward (Vf) (Max) @ if550 mV @ 10 A
Current - reverse leakage @ vr200 µA @ 45 V
Current - average rectified (Io) (per diode)10A
Operating temperature - junction150°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologySchottky
CaseTO-220-3
Diode configuration1 Pair Common Cathode

Product details

Schottky pair for 45 V rails — what the ratings mean

The STPS20L45CT is a dual Schottky rectifier in a common-cathode configuration, rated for 45 V reverse voltage and 10 A average forward current per diode. The 550 mV forward drop at 10 A sets the conduction loss floor — at full load each diode dissipates roughly 5.5 W, so the TO-220 package's junction-to-case thermal path must be kept below 150 °C junction maximum.

STMicroelectronics lists the STPS20L45CT as obsolete.

Through-hole TO-220-3 package, supplied in tube. The common-cathode pinout simplifies PCB layout for center-tapped full-wave rectifiers and OR-ing diode arrays — the two anodes are separate, the cathode tab is shared. The metal tab carries the cathode potential and must be electrically isolated or connected to the common cathode rail.

Frequently asked questions

Is STPS20L45CT obsolete?

Yes, STMicroelectronics lists the STPS20L45CT as obsolete. No official successor part number has been published. For existing designs, the part can be sourced through the surplus and broker channel.

What is the replacement or equivalent for STPS20L45CT?

No official replacement or cross-reference is recorded. A form-fit-function substitute would need to match the 45 V reverse rating, 10 A per diode average current, common-cathode configuration, and TO-220-3 package. Verify the forward voltage and thermal characteristics against the original design's margin.