Is there a pin-compatible replacement for CDSOT23-SM712-MS?

Candidates like SM712-02HTG and SM712.TCT share the same package and function, making them likely pin-compatible replacements for RS-485 protection. However, always confirm the pinout from the datasheets before soldering.

What risks should I check before replacing CDSOT23-SM712-MS?

The main risk is incorrect functionality. Ensure the replacement is also an asymmetrical TVS designed for RS-485 (12V/-7V protection). Also, verify the SOT-23 pinout matches your PCB layout and that clamping voltage and capacitance meet your system's requirements.

CDSOT23-SM712-MS Alternatives, Datasheet & Cross Reference | MSKSEMI

CDSOT23-SM712-MS is an asymmetrical TVS diode in a SOT-23 package for RS-485 data line protection. Several alternatives with similar function and upgraded power ratings are available.

AI replacement insight

Electrical risklow

Low if an asymmetrical TVS with similar or better ratings is chosen.

Package risklow

SOT-23 is a standard package, but pinout must be verified.

Sourcing risklow

Multiple vendors produce compatible parts for the SM712 family.

Can it be replaced directly?

Yes, several direct replacements exist. SM712-02HTG is a strong candidate offering upgraded protection in the same package.

Best replacement path

Use a part from the SM712 family, such as SM712-02HTG or SM712.TCT, which offer the same asymmetrical protection with higher power ratings.

Main risk

The primary risk is selecting a standard bidirectional or unidirectional TVS instead of the required asymmetrical type, which would fail to protect the RS-485 bus correctly.

Recommended alternatives

A strong functional alternative with the same package and higher power and current ratings.

View details

Alternative comparison matrix

Feature / factor	CDSOT23-SM712-MS	PSM712-LF-T7-JSM	SM712-02HTG	SM712.TCT	Compatibility / risk
Package	SOT-23	SOT-23	SOT23 / SOT-23	SOT23	SOT-23 / SOT23 / SOT-23 — Package is form-factor compatible.; SM712-02HTG: Package is form-factor compatible.; SM712.TCT: Package is form-factor compatible.
Polarity Or Type	Asymmetrical 12V/7V	Asymmetrical 12V/7V	Asymmetrical 12V/7V	Asymmetrical 12V/-7V	Asymmetrical 12V/7V / Asymmetrical 12V/-7V — Both are asymmetrical TVS for RS-485.; SM712-02HTG: Both are asymmetrical TVS for RS-485.; SM712.TCT: Both are asymmetrical TVS for RS-485.
Power	340W	400W	400W / 500W	400W	400W / 400W / 500W — Candidate offers higher peak power protection.; SM712-02HTG: Candidate offers higher peak power protection.; SM712.TCT: Candidate offers higher peak power protection.
Current	12A	17A	12A / 20A	17A	17A / 12A / 20A — Candidate offers higher peak current rating.; SM712-02HTG: Candidate offers higher peak current rating.; SM712.TCT: Candidate offers higher peak current rating.

Application & sourcing insights

Questions & answers

Parts like SM712-02HTG, SM712.TCT, and PSM712-LF-T7-JSM are strong functional alternatives, offering higher power and current protection in the same SOT-23 package. Pinout should be verified.