Is there a pin-compatible replacement for B4B-ZR(LF)(SN)?

While several candidates match key specs (4-pin, 1.5mm pitch), true pin-compatibility requires comparing mechanical drawings in the datasheets to ensure the footprint and shroud dimensions are identical. No candidate is pre-verified as a drop-in replacement.

What risks should I check before replacing B4B-ZR(LF)(SN)?

When replacing B4B-ZR(LF)(SN), the main risks are mechanical. Check the substitute's PCB footprint, shroud dimensions, and solder tail length. For cross-vendor parts, also verify mating connector compatibility and material specifications.

B4B-ZR(LF)(SN) Alternatives, Datasheet & Cross Reference | JST

B4B-ZR(LF)(SN) is a 4-pin, 1.5mm pitch through-hole header from JST's ZH series. This page provides verified alternatives, including variants and cross-vendor options, to help engineers manage sourcing challenges.

AI replacement insight

Package riskmedium

Footprint and shroud dimensions must be verified for cross-vendor parts.

Electrical risklow

Key electrical ratings are matched or exceeded by top candidates.

Can it be replaced directly?

No pre-verified direct drop-in replacement is available. The closest options require mechanical verification via datasheet comparison.

Best replacement path

Start with JST variant B4B-ZR-3.4(LF)(SN), verifying tail length. If unavailable, evaluate A1501WV-4P by comparing datasheets.

Main risk

Mechanical incompatibility, including PCB footprint, shroud dimensions, and mating connector fit.

Recommended alternatives

A variant from the same JST family with identical core specs but different solder tail length.

View details

Alternative comparison matrix

Feature / factor	B4B-ZR(LF)(SN)	B4B-ZR-3.4(LF)(SN)	A1501WV-4P	Compatibility / risk
Package	Through Hole	Through Hole	Through Hole	Through Hole — Package type matches.; A1501WV-4P: Package type matches.
Pinout	4	4	4	4 — Pin count matches.; A1501WV-4P: Pin count matches.
Pitch Mm	1.5mm	1.5mm	1.5mm	1.5mm — Pitch matches.; A1501WV-4P: Pitch matches.
Voltage	50V	50V	100V	50V / 100V — Voltage rating matches.; A1501WV-4P: Higher voltage rating.
Mechanical	Not specified	3.4mm	-	3.4mm — Solder tail length differs, check PCB thickness.
Temperature	-25°C to +85°C	-	-40°C to +105°C	-40°C to +105°C — Wider operating temperature range.

Application & sourcing insights

Questions & answers

The JST part B4B-ZR-3.4(LF)(SN) is the closest alternative, differing only in solder tail length. For a cross-vendor option, A1501WV-4P from CJT offers similar functionality with improved ratings, but requires mechanical verification.