Is there a pin-compatible replacement for STPS2150A?

While several 2A diodes exist in the same SMA package, no direct pin-compatible Schottky replacement with identical or better performance was found in this analysis. Alternatives like MURA220T3G have a different diode technology and are not drop-in replacements.

What risks should I check before replacing STPS2150A?

The main risk is increased power dissipation due to higher forward voltage (Vf) when using a non-Schottky alternative. This can lead to lower efficiency and higher operating temperatures, potentially affecting system reliability. Always verify thermal performance in your application.

STPS2150A Alternatives, Datasheet & Cross Reference | STMicroelectronics

STPS2150A is a 150V, 2A Schottky rectifier in an SMA package, valued for its low forward voltage and high efficiency. Finding a direct replacement requires matching its Schottky technology to maintain performance, as standard fast-recovery diodes will increase power loss.

AI replacement insight

Electrical riskhigh

Higher forward voltage (Vf) will increase conduction losses and may affect circuit behavior.

Package risklow

Candidates use the same or compatible SMA package, ensuring form and fit compatibility.

Firmware risklow

As a simple diode, no firmware changes are required.

Can it be replaced directly?

No, a direct, drop-in replacement for the STPS2150A was not identified. All candidates are a different diode technology (fast/ultrafast recovery) which have a higher forward voltage, impacting efficiency and thermal performance.

Best replacement path

The best path is to find another 150V (or higher), 2A Schottky diode in an SMA package with a forward voltage of 0.67V or less. If unavailable, MURA220T3G is a functional alternative that requires careful thermal validation.

Main risk

The primary risk is increased power dissipation and heat due to the higher forward voltage of non-Schottky alternatives, which can reduce system efficiency and reliability.

Recommended alternatives

A functional alternative in the same package with a higher voltage rating, but its different diode technology results in higher power loss.

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Alternative comparison matrix

Feature / factor	STPS2150A	MURA220T3G	ES2D	Compatibility / risk
Package	SMA (DO-214AC)	SMA (DO-214AC)	SMA	SMA (DO-214AC) — Package is form-factor compatible.; ES2D: Package is form-factor compatible.
Voltage	150V	200V	200V	200V — Higher voltage rating provides more design margin.; ES2D: Higher voltage rating provides more design margin.
Current	2A	2A	2A	2A — Average forward current matches.; ES2D: Average forward current matches.
Diode Type	Schottky	Ultrafast	Superfast	Ultrafast / Superfast — Different technology. Target is a Schottky diode.; ES2D: Different technology. Target is a Schottky diode.
Forward Voltage	0.67V @ 2A	~0.95V @ 2A	~0.95V @ 2A	~0.95V @ 2A — Higher forward voltage will increase power loss.; ES2D: Higher forward voltage will increase power loss.
Temperature	175°C	175°C	150°C	175°C / 150°C — Maximum junction temperature matches.; ES2D: Lower max junction temperature than target.

Application & sourcing insights

Questions & answers

MURA220T3G can be considered a functional alternative, but it is an ultrafast diode, not a Schottky. This results in a higher forward voltage, which will increase power loss. Careful testing is required before use.