Is there a pin-compatible replacement for SM712-02HTG?

Yes, SM712.TCT from Semtech and SM712-N from BORN are both offered in the same SOT-23 package and share the same pin configuration for RS-485 protection, making them pin-compatible replacements.

What risks should I check before replacing SM712-02HTG?

The main risk is the slightly lower peak pulse power rating on most alternatives (e.g., 400W vs. the original's 450W). You should verify if this reduced protection margin is acceptable for your system's expected electrical transient environment.

SM712-02HTG Alternatives, Datasheet & Cross Reference | TECH PUBLIC

SM712-02HTG is an asymmetrical TVS diode in a SOT-23 package, optimized for protecting RS-485 data lines. Finding a replacement involves matching the unique asymmetrical voltage protection, package, and power rating.

AI replacement insight

Electrical risklow

Most alternatives have a slightly lower power rating. This must be verified against the application's transient threat level.

Package risklow

The SOT-23 package is standard, and pinouts for this function are consistent across vendors.

Sourcing risklow

The SM712 is a popular part, with multiple vendors offering compatible versions, improving supply chain resilience.

Can it be replaced directly?

Yes, there are several pin-compatible alternatives in the SM712 family from other manufacturers, such as Semtech's SM712.TCT.

Best replacement path

Use a cross-vendor SM712 family part like Semtech's SM712.TCT.

Main risk

The primary risk is a slightly lower peak pulse power rating in most alternatives (400W vs. 450W).

Recommended alternatives

A strong, pin-compatible alternative from Semtech for RS-485 protection, with a slightly lower power rating.

View details

Alternative comparison matrix

Feature / factor	SM712-02HTG	SM712.TCT	SM712-N	Compatibility / risk
Package	SOT-23	SOT23	SOT23	SOT23 — Package matches, enabling form-fit compatibility.; SM712-N: Package matches, enabling form-fit compatibility.
Diode Type	Asymmetrical	Asymmetrical (inferred)	Asymmetrical	Asymmetrical (inferred) — Functionally similar for RS-485 protection.; SM712-N: Functionally identical for RS-485 protection.
Voltage	12V / 7V	12V / -7V	12V / 7V	12V / -7V / 12V / 7V — Working voltage range matches target application.; SM712-N: Working voltage range matches target application.
Power	450W	400W	400W	400W — Slightly lower power rating, requires design review.; SM712-N: Slightly lower power rating, requires design review.
Current	17A	17A	Not specified	17A / Not specified — Peak pulse current matches target.; SM712-N: Peak pulse current not found in structured data.

Application & sourcing insights

Questions & answers

The best alternative is likely SM712.TCT by Semtech. It is functionally identical, pin-compatible, and from a major manufacturer, with only a minor difference in power rating that is acceptable for most designs.