Is there a pin-compatible replacement for SM03B-SRSS-TB(LF)(SN)?

Several manufacturers produce connectors intended as clones of the JST SH series. While they may be pin-compatible, it is critical to compare the datasheets to confirm the exact dimensions and PCB footprint, as minor variations can exist.

What risks should I check before replacing SM03B-SRSS-TB(LF)(SN)?

The main risk is mechanical incompatibility. You must verify the PCB footprint, connector height, and shroud dimensions. Also, check mating connector compatibility and ensure the substitute's material and plating meet your application's requirements.

SM03B-SRSS-TB(LF)(SN) Alternatives, Datasheet & Cross Reference | JST

SM03B-SRSS-TB(LF)(SN) is a popular 3-pin, 1.0mm pitch side-entry SMT header from JST's SH series. Finding a substitute requires careful verification of the PCB footprint and mechanical dimensions.

AI replacement insight

Package riskhigh

PCB footprint and connector dimensions must be verified from datasheets as clones can have minor variations.

Electrical risklow

Candidates have matching or superior voltage and current ratings.

Sourcing risklow

Multiple alternative manufacturers exist for this popular connector series.

Can it be replaced directly?

No verified direct drop-in replacement has been identified; all candidates require mechanical verification by an engineer.

Best replacement path

Cross-vendor functional alternatives from manufacturers like Megastar or XUNPU, pending mechanical verification.

Main risk

Mechanical footprint mismatch.

Recommended alternatives

A 3-pin, 1.0mm pitch header from Megastar with a higher current rating. Mechanical fit must be verified.

View details

Alternative comparison matrix

Feature / factor	SM03B-SRSS-TB(LF)(SN)	ZX-SH1.0-3PWT	WAFER-SH1.0-3PWB	Compatibility / risk
Pin Count	3	3	3	3 — Pin count matches.; WAFER-SH1.0-3PWB: Pin count matches.
Pitch	1.0mm	1.0mm	1.0mm	1.0mm — Pitch matches.; WAFER-SH1.0-3PWB: Pitch matches.
Package	SMT, Side Entry	SMT, Right Angle	Surface Mount, Right Angle	SMT, Right Angle / Surface Mount, Right Angle — Functionally similar mounting, but footprint must be verified.; WAFER-SH1.0-3PWB: Functionally similar mounting, but footprint must be verified.
Current	0.7A	1.0A	1.0A	1.0A — Higher current rating is generally acceptable.; WAFER-SH1.0-3PWB: Higher current rating is generally acceptable.
Voltage	50V	50V	50V	50V — Voltage rating matches.; WAFER-SH1.0-3PWB: Voltage rating matches.

Application & sourcing insights

Questions & answers

Parts like Megastar's ZX-SH1.0-3PWT are strong functional alternatives with similar electrical specs. However, you must verify the mechanical drawings and PCB layout for compatibility before ordering.