Is there a pin-compatible replacement for B2B-EH-A(LF)(SN)?

A true pin-compatible replacement must be from the same JST EH series to ensure the footprint, height, and shroud dimensions match. Alternatives from other series require careful verification and likely PCB layout changes.

What risks should I check before replacing B2B-EH-A(LF)(SN)?

The main risks are mechanical. Check the substitute's datasheet for: 1) PCB footprint (pin and mounting hole locations), 2) mounted height, 3) shroud dimensions, and 4) compatibility with your existing mating connector (wire housing).

B2B-EH-A(LF)(SN) Alternatives, Datasheet & Cross Reference | JST

B2B-EH-A(LF)(SN) is a 2-pin, 2.5mm pitch straight through-hole header from JST's compact EH series. Finding a direct replacement requires matching the specific EH series housing dimensions for proper PCB fit and mating.

AI replacement insight

Package riskhigh

Different connector series (EH vs. XH) have different footprints and housing dimensions.

Electrical risklow

Many alternatives share the same voltage/current ratings.

Can it be replaced directly?

No direct, verified pin-to-pin replacement has been identified from a different connector series. Substitutes require mechanical verification.

Best replacement path

Source another JST EH series 2-pin straight header. Avoid other series like XH unless you can modify the PCB layout and change the mating connector.

Main risk

Mechanical incompatibility. Using a connector from a different series (e.g., XH) will likely fail to fit the PCB footprint and mate with the intended EH housing.

Recommended alternatives

A functional alternative from the JST XH series with the same pitch and ratings, but different housing dimensions.

View details

Alternative comparison matrix

Feature / factor	B2B-EH-A(LF)(SN)	B2B-XH-AM(LF)(SN)	ZX-XH2.54-2PZZ-Y	Compatibility / risk
Family	EH Series	XH Series	XH Series (clone)	XH Series / XH Series (clone) — Different housing dimensions and mating interface.; ZX-XH2.54-2PZZ-Y: Different housing dimensions and mating interface.
Package	Through Hole, Straight	Through Hole, Straight	-	Through Hole, Straight — Orientation matches, but footprint may differ.
Pitch Mm	2.5mm	2.5mm	2.5mm	2.5mm — Pitch is identical.; ZX-XH2.54-2PZZ-Y: Pitch is identical.
Current	3A	3A	-	3A — Current rating matches.
Manufacturer Name	JST	-	Megastar	Megastar — Cross-vendor alternative.
Voltage	3A / 250V	-	3A / 250V	3A / 250V — Ratings match.

Application & sourcing insights

Questions & answers

The best alternative is another 2-position header from the JST EH series. While parts from other series like JST XH exist with similar electrical ratings, they have different physical dimensions and are not drop-in replacements.