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

While several parts like XUNPU's WAFER-GH1.25-3PWB are functionally and dimensionally very similar, true pin-compatibility requires verifying the datasheet's mechanical drawing against your PCB layout. No drop-in replacement is guaranteed without this check.

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

The main risks are mechanical fit and material differences. Always verify the substitute's PCB footprint. Also, check for differences in contact material (e.g., Brass vs. Phosphor Bronze), which can affect durability and performance in some applications.

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

Find and compare functional alternatives for the JST SM03B-GHS-TB(LF)(SN), a 3-pin 1.25mm pitch side-entry SMT header. Review key parametric differences and potential risks before substitution.

AI replacement insight

Package riskmedium

Footprint must be verified via datasheet mechanical drawings.

Electrical risklow

Most candidates meet or exceed voltage/current ratings.

Sourcing risklow

Multiple vendors offer connectors in this common form factor.

Can it be replaced directly?

No guaranteed drop-in replacement exists without verifying mechanical drawings. WAFER-GH1.25-3PWB is a strong functional match that requires footprint validation.

Best replacement path

Cross-reference to other GH-series compatible connectors like XUNPU's WAFER-GH1.25-3PWB, after verifying the mechanical drawing.

Main risk

Mechanical footprint mismatch is the primary risk, potentially requiring PCB layout changes if not verified.

Recommended alternatives

Strong functional match from the same connector series with a higher voltage rating; requires footprint verification.

View details

Alternative comparison matrix

Feature / factor	SM03B-GHS-TB(LF)(SN)	WAFER-GH1.25-3PWB	WAFER-MX1.25-3PWB	HC-1.25-3PWT	Compatibility / risk
Package	Side-Entry SMT	Right-Angle SMT	Right-Angle SMT	Right-Angle SMT	Right-Angle SMT — Functionally identical form factor (SMT, Right-Angle).; WAFER-MX1.25-3PWB: Functionally identical form factor (SMT, Right-Angle).; HC-1.25-3PWT: Functionally identical form factor (SMT, Right-Angle).
Voltage	50V	125V	125V	250V	125V / 250V — Higher voltage rating provides more margin.; WAFER-MX1.25-3PWB: Higher voltage rating provides more margin.; HC-1.25-3PWT: Significantly higher voltage rating.
Current	1.0A	1.0A	1.0A	2.0A	1.0A / 2.0A — Current rating matches target.; WAFER-MX1.25-3PWB: Current rating matches target.; HC-1.25-3PWT: Higher current rating offers an upgrade path.
Contact Material	Phosphor Bronze	Brass	Brass	Brass	Brass — Weaker material, may affect long-term reliability/mating cycles.; WAFER-MX1.25-3PWB: Weaker material, may affect long-term reliability.; HC-1.25-3PWT: Weaker material, may affect long-term reliability.

Application & sourcing insights

Questions & answers

WAFER-GH1.25-3PWB by XUNPU is a strong candidate, sharing the GH series family name, 1.25mm pitch, and right-angle SMT configuration. However, users must verify the PCB footprint and consider the brass contact material.