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STMicroelectronics STPS40170CT — Discrete Semiconductors

STPS40170CT Schottky Diode, 170V 20A Common Cathode TO-220

MPNSTPS40170CT
Active

STMicroelectronics STPS40170CT, dual Schottky rectifier, 1 Pair Common Cathode, 170 V Vr, 20 A per diode, 920 mV Vf at 20 A, Fast Recovery =< 500ns, > 200mA (Io), TO-220-3, Through Hole, Tube.

$2.1500Ref. price · indicative, final on quote
STMicroelectronics STPS40170CT datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STPS40170CT specifications
ParameterValue
Diode typeSchottky
MountingThrough Hole
Voltage - DC reverse (Vr)170 V
Voltage - forward (Vf) (Max) @ if920 mV @ 20 A
Current - reverse leakage @ vr30 µA @ 170 V
Current - average rectified (Io) (per diode)20A
Operating temperature - junction175°C(Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
CaseTO-220-3
Diode configuration1 Pair Common Cathode

Product details

Fast recovery characteristic — switching loss context

The 500 ns ceiling is conservative for a Schottky; typical turn-off times are well under 50 ns. For a 100 kHz PFC boost stage the switching loss in the diode is negligible compared to the conduction loss from the 920 mV Vf. The spec matters more if you are comparing against an ultrafast silicon diode in a replacement scenario — the Schottky wins on switching loss but loses on leakage at high temperature.

STMicroelectronics lists the STPS40170CT as Active. For a power-stage BOM that already qualifies this dual-Schottky footprint, there is no urgency to qualify a second source. The base product number STPS40170 covers the family; the CT suffix indicates the TO-220 package variant. If a future EOL were announced, the common-cathode TO-220 footprint is widely second-sourced across the industry — but that is a contingency, not a current need.

Frequently asked questions

What is STPS40170CT's listed speed rating?

The STPS40170CT is rated Fast Recovery =< 500ns, > 200mA (Io). As a Schottky diode, its actual switching speed is much faster than this ceiling — the 500 ns spec is a conservative bound for the recovery time classification.