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STMicroelectronics STPS30L40CT — Discrete Semiconductors

STPS30L40CT Schottky Diode, 40 V 15 A, TO-220-3, Obsolete

MPNSTPS30L40CT
Obsolete

STMicroelectronics STPS30L40CT, Schottky Diode, 1 Pair Common Cathode, 40 V, 15 A per diode, 550 mV Vf @ 15 A, Fast Recovery ≤500 ns, TO-220-3, Through Hole.

STMicroelectronics STPS30L40CT datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS30L40CT specifications
ParameterValue
Diode typeSchottky
MountingThrough Hole
Voltage - DC reverse (Vr)40 V
Voltage - forward (Vf) (Max) @ if550 mV @ 15 A
Current - reverse leakage @ vr360 µA @ 40 V
Current - average rectified (Io) (per diode)15A
Operating temperature - junction150°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
CaseTO-220-3
Diode configuration1 Pair Common Cathode

Product details

The STPS30L40CT is a dual Schottky rectifier from STMicroelectronics, configured as a common-cathode pair in a single TO-220-3 through-hole package. The fast recovery characteristic (≤500 ns, >200 mA) suits it for high-frequency switching in power supplies, DC-DC converters, and OR-ing diodes in redundant power architectures.

The 40 V reverse voltage rating is the maximum DC blocking voltage the diode can withstand in the off state. The 15 A per-diode average current is the continuous forward current each Schottky can handle at rated case temperature; the common-cathode pair can be paralleled for a total of 30 A if the PCB layout and heatsinking are designed for balanced current sharing. The 550 mV forward drop at 15 A is typical for a 40 V Schottky in this current class — lower than a pn-junction diode, which keeps conduction losses manageable in a high-current rail.

The junction temperature limit is 150 °C maximum. The common-cathode configuration means the two anodes are independent, so the tab is electrically common with the cathode — keep that in mind for heatsink isolation or use an insulating pad.

Frequently asked questions

Where can I buy the STPS30L40CT and how do I get a price?

The STPS30L40CT is obsolete and not available through normal distribution. We source it through our independent supply network. Submit an RFQ on this page; we will confirm availability and current pricing at quote time.

Is the STPS30L40CT obsolete and what is a replacement?

Yes, STMicroelectronics lists the STPS30L40CT as obsolete. For a replacement, look for a common-cathode dual Schottky in TO-220-3 with a 40 V, 15 A rating — for example, the STPS30L40CW or similar from other manufacturers — but verify pin compatibility and thermal performance against your application.

What are the specifications of the STPS30L40CT?

The STPS30L40CT is a dual common-cathode Schottky diode rated for 40 V reverse voltage, 15 A average rectified current per diode, 550 mV forward voltage drop at 15 A, and fast recovery ≤500 ns at >200 mA. It comes in a TO-220-3 through-hole package with a maximum junction temperature of 150 °C.