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STMicroelectronics STPS1545G — Discrete Semiconductors

STPS1545G Schottky Rectifier, 15A 45V D2PAK, Obsolete

MPNSTPS1545G
Obsolete

STMicroelectronics STPS1545G Schottky rectifier, 15 A average rectified current, 45 V reverse voltage, 840 mV forward drop at 30 A, 175°C max junction temperature, D2PAK (TO-263) surface-mount package.

$0.3353Ref. price · indicative, final on quote
STMicroelectronics STPS1545G datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STPS1545G specifications
ParameterValue
MountingSurface Mount
Voltage - DC reverse (Vr)45 V
Voltage - forward (Vf) (Max) @ if840 mV @ 30 A
Current - reverse leakage @ vr200 µA @ 45 V
Current - average rectified15A
Operating temperature - junction175°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologySchottky
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB

Product details

The STPS1545G is a 15 A average, 45 V reverse-rated Schottky rectifier from STMicroelectronics in a D2PAK (TO-263) surface-mount package. It's built for medium-current, fast-switching roles like output rectification in switch-mode supplies, freewheeling diodes across inductive loads, and OR-ing diodes in redundant power systems. The Schottky technology gives you a low forward drop — 840 mV at 30 A — which keeps conduction losses down compared to a standard PN-junction diode at similar current.

Obsolete — sourcing this part today

STMicroelectronics lists the STPS1545G as Obsolete. If your design is still in development or you're planning a long production run, a drop-in alternative is worth evaluating now rather than chasing diminishing stock.

Drop-in alternative — what to look for

The base part number STPS1545 (without the 'G' suffix) is the same die in a different package option — through-hole versus surface-mount. The 'G' denotes the D2PAK / TO-263 surface-mount variant. If your board is laid out for the D2PAK footprint, you need a part in that same package. A direct pin-compatible replacement would be another 15 A, 45 V Schottky in D2PAK from a major supplier — same tab-anode-cathode pinout, same footprint. ST's own STPS1545G is the one you're searching; for a second-source candidate, look at parts like the MBR1545CT in D2PAK from ON Semiconductor or Vishay, but verify the pinout and thermal pad connection match your layout.

Frequently asked questions

What is the replacement for STPS1545G?

STMicroelectronics has not published an official successor for the STPS1545G. For a pin-compatible drop-in, look for another 15 A, 45 V Schottky rectifier in D2PAK (TO-263) from a major supplier such as ON Semiconductor's MBR1545CT or Vishay's similar part — verify the pinout and thermal pad connection match your layout before committing the BOM.

What are the specifications of STPS1545G?

The STPS1545G is a Schottky rectifier rated for 15 A average rectified current and 45 V reverse voltage. Forward drop is 840 mV at 30 A. Maximum junction temperature is 175°C. It comes in a D2PAK (TO-263) surface-mount package. Reverse leakage is 200 µA at 45 V.

Is STPS1545G equivalent to STPS1545?

The STPS1545 and STPS1545G are electrically the same Schottky die — same 15 A, 45 V ratings. The difference is the package: STPS1545 is through-hole, while STPS1545G is the D2PAK surface-mount variant. They are not footprint-compatible.