Is there a pin-compatible replacement for B4B-PH-SM4-TBT(LF)(SN)?

No replacement is verified as pin-to-pin without engineering review of the mechanical drawings. However, candidates like CJT A2001WV-S-4P have the same mounting type, pin count, and pitch, making them strong candidates for a form-fit-function replacement.

What risks should I check before replacing B4B-PH-SM4-TBT(LF)(SN)?

The main risk is mechanical mismatch. You must verify that the substitute's PCB footprint (pad layout) and shroud dimensions are compatible with your board design and the mating connector. Electrical ratings should also be confirmed to meet or exceed the original part's specifications.

B4B-PH-SM4-TBT(LF)(SN) Alternatives, Datasheet & Cross Reference | JST

The JST B4B-PH-SM4-TBT(LF)(SN) is a popular 4-pin, 2.0mm pitch SMT shrouded header. Several form-fit-function alternatives exist, primarily requiring verification of the PCB footprint and shroud dimensions before substitution.

AI replacement insight

Package riskmedium

PCB footprint and shroud dimensions must be verified from datasheets.

Electrical risklow

Candidates have matching or superior electrical ratings.

Can it be replaced directly?

No confirmed drop-in replacement is available without engineering review. However, parts like CJT A2001WV-S-4P are strong functional alternatives that match key specifications.

Best replacement path

Use a compatible 2.0mm pitch SMT vertical shrouded header like the CJT A2001WV-S-4P, after verifying the mechanical drawing and PCB footprint.

Main risk

The primary risk is mechanical incompatibility, specifically the PCB footprint and the mating connector's fit within the shroud.

Recommended alternatives

This SMT header matches key dimensions and electrical ratings, with a wider temperature range.

View details

Alternative comparison matrix

Feature / factor	B4B-PH-SM4-TBT(LF)(SN)	A2001WV-S-4P	A2012WV-S-4P	Compatibility / risk
Package	4-pin SMT Header	4-pin SMT Header	4-pin SMT Header	4-pin SMT Header — Same pitch, pin count, and SMT mounting.; A2012WV-S-4P: Same pitch, pin count, and SMT mounting.
Current	2 A	2 A	3 A	2 A / 3 A — Current rating matches.; A2012WV-S-4P: Candidate has higher current rating.
Voltage	100 V	100 V	250 V	100 V / 250 V — Voltage rating matches.; A2012WV-S-4P: Candidate has higher voltage rating.
Temperature	-25°C to +85°C	-40°C to +105°C	-40°C to +105°C	-40°C to +105°C — Candidate has a wider operating range.; A2012WV-S-4P: Candidate has a wider operating range.

Application & sourcing insights

Questions & answers

The CJT A2001WV-S-4P is a strong candidate, offering identical key electrical ratings and a similar form factor. For a potential upgrade, the CJT A2012WV-S-4P offers higher voltage and current ratings. Both require mechanical verification.