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STMicroelectronics STPS0520Z — Discrete Semiconductors

STPS0520Z Schottky Diode, 20 V, 500 mA, SOD-123

MPNSTPS0520Z
Active

STMicroelectronics STPS0520Z Schottky rectifier, 20 V reverse voltage, 500 mA average rectified current, 385 mV forward drop, SOD-123 surface-mount package, Tape & Reel.

$0.3700Ref. price · indicative, final on quote
STMicroelectronics STPS0520Z datasheet (PDF)
PackagingSOD-123
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STPS0520Z specifications
ParameterValue
MountingSurface Mount
Voltage - DC reverse (Vr)20 V
Voltage - forward (Vf) (Max) @ if385 mV @ 500 mA
Current - reverse leakage @ vr150 µA @ 20 V
Current - average rectified500mA
Operating temperature - junction125°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTape & Reel (TR) Cut Tape (CT)
TechnologySchottky
CaseSOD-123

Product details

500 mA Schottky for low-voltage rails

The STPS0520Z is a 20 V, 500 mA Schottky rectifier in the SOD-123 surface-mount package. Reverse leakage is 150 µA at the 20 V maximum reverse voltage — typical for a low-Vf Schottky. In an always-on circuit where the diode blocks a backup supply, that leakage contributes to standby current; for a 100 mAh battery, it represents roughly 0.15 % per hour drain.

SOD-123 is a standard small-signal diode footprint, 2.6 mm × 1.6 mm body with gull-wing leads. The 0.50 mm pitch lands on a 1.6 mm PCB without micro-vias. Tape & Reel packaging (Cut Tape also available) suits automated pick-and-place at standard feeder pitches. Junction temperature is rated to 125 °C maximum. For a 500 mA load at 85 °C ambient, derate the forward current per the thermal resistance of the copper pad — a 15 mm² pad on a 2-layer board keeps the junction below 110 °C at full rated current.

Frequently asked questions

What is the closest functional alternative — STPS0540Z?

The STPS0540Z is the 40 V reverse voltage sibling in the same SOD-123 package and 500 mA current rating. It drops into the same PCB footprint and handles 24 V rails where the 20 V STPS0520Z would exceed its maximum reverse voltage. The forward drop is slightly higher (typically 400 mV at 500 mA) due to the thicker epitaxial layer needed for the higher voltage blocking.

What compliance documentation does STMicroelectronics provide for STPS0520Z?

STMicroelectronics provides ROHS3 compliance certification (EU 2015/863) for the STPS0520Z. No UL, IEC, or AEC-Q automotive qualification is listed in the standard product documentation. The device is classified as a commercial/industrial-grade Schottky rectifier.