Is there a pin-compatible replacement for STTH102A?

Yes, parts like STTH110A and US2M are pin-compatible in the same SMA package. However, they are not electrically identical, featuring a slower reverse recovery time which may not be suitable for all applications.

What risks should I check before replacing STTH102A?

The main risk is the reverse recovery time (trr). The STTH102A is an ultrafast diode (20ns). Using a slower diode can lead to higher switching losses, overheating, and reduced efficiency or failure in high-frequency circuits. Always verify the trr of a potential replacement.

STTH102A Alternatives, Datasheet & Cross Reference | STMicroelectronics

STTH102A is a 200V, 1A ultrafast rectifier in an SMA package, notable for its 20ns reverse recovery time. Finding a direct replacement requires matching this critical speed parameter.

AI replacement insight

Electrical riskhigh

Significant mismatch in reverse recovery time (trr) can impact circuit performance and reliability.

Package risklow

Multiple candidates are available in the same SMA (DO-214AC) package.

Can it be replaced directly?

No direct drop-in replacements were found. Candidates like STTH110A match the package but have a slower recovery time (75ns vs 20ns), which requires careful engineering review.

Best replacement path

Search for ultrafast rectifiers with trr <= 20ns, Vr >= 200V, and Io >= 1A in an SMA (DO-214AC) package.

Main risk

The primary risk is timing. Using a slower diode can cause increased switching losses, heat, and potential circuit failure in high-frequency applications.

Recommended alternatives

Matches package and current with higher voltage, but has a slower recovery time requiring review.

View details

Alternative comparison matrix

Feature / factor	STTH102A	STTH110A	US2M	Compatibility / risk
Package	SMA (DO-214AC)	SMA (DO-214AC)	DO-214AC (SMA)	SMA (DO-214AC) / DO-214AC (SMA) — Package is form-fit compatible.; US2M: Package is form-fit compatible.
Voltage	200V	1000V	1000V	1000V — Candidate has a higher voltage rating.; US2M: Candidate has a higher voltage rating.
Current	1.0A	1.0A	2.0A	1.0A / 2.0A — Current rating is identical.; US2M: Candidate has a higher current rating.
Speed	20ns	~75ns	~75ns	~75ns — Slower reverse recovery time (trr). Target is ultrafast.; US2M: Slower reverse recovery time (trr). Target is ultrafast.

Application & sourcing insights

Questions & answers

The best alternatives are other ultrafast diodes with a reverse recovery time (trr) of 20ns or less, voltage of 200V or more, and current of 1A or more in an SMA package. Candidates with slower trr, like STTH110A, exist but require careful engineering review.