Is there a pin-compatible replacement for SM04B-PASS-TBT(LF)(SN)?

No pin-compatible replacement has been confirmed. While some candidates match the SMT, right-angle, 4-pin, 2.0mm pitch format, their exact PCB footprints must be verified from datasheets. Furthermore, all identified options have a lower current rating, preventing a direct drop-in replacement.

What risks should I check before replacing SM04B-PASS-TBT(LF)(SN)?

Before replacing, you must verify two key risks. First, the electrical risk: ensure your application's actual current draw is safely below the substitute's 2A rating. Second, the mechanical risk: compare the datasheet footprints of the target and candidate to confirm they are physically interchangeable on your PCB.

SM04B-PASS-TBT(LF)(SN) Alternatives, Datasheet & Cross Reference | JST

SM04B-PASS-TBT(LF)(SN) is a 4-pin, 2.0mm pitch, side-entry (right-angle) SMT shrouded header from JST's PA series, rated for 3A and 100V. Finding a substitute requires matching the mechanical form factor and verifying the current rating.

AI replacement insight

Electrical riskhigh

Candidates have a lower current rating (2A vs 3A), which is a critical downgrade.

Package riskmedium

While candidates are SMT right-angle, the exact PCB footprint must be verified from datasheets to ensure mechanical compatibility.

Can it be replaced directly?

No direct, drop-in replacement has been identified. All potential candidates have a lower current rating (2A vs. 3A) and require mechanical footprint verification.

Best replacement path

Parametric alternatives exist but have a lower current rating, requiring careful review of the application's power requirements.

Main risk

The primary risk is electrical; using a substitute with a 2A current rating in an application designed for 3A could lead to overheating and failure.

Recommended alternatives

A 4-pin, 2.0mm pitch SMT header with a lower current rating; requires design review.

View details

Alternative comparison matrix

Feature / factor	SM04B-PASS-TBT(LF)(SN)	PH-4AWT	WF-1F200A4P	Compatibility / risk
Package	SMT, Side-Entry	SMT, Right-Angle	SMT, Right-Angle	SMT, Right-Angle — Candidate is SMT right-angle, matching target's side-entry form.; WF-1F200A4P: Candidate is SMT right-angle, matching target's side-entry form.
Current	3.0A	2.0A	2.0A	2.0A — Lower current rating requires application review.; WF-1F200A4P: Lower current rating requires application review.
Voltage	100V	250V	250V	250V — Higher voltage rating is generally acceptable.; WF-1F200A4P: Higher voltage rating is generally acceptable.
Temperature	-25°C to +85°C	-25°C to +85°C	-25°C to +85°C	-25°C to +85°C — matched; WF-1F200A4P: matched
Pinout	JST PA Series	Unknown	Unknown	Unknown — Mechanical drawing and footprint must be compared.; WF-1F200A4P: Mechanical drawing and footprint must be compared.

Application & sourcing insights

Questions & answers

The best alternatives found, such as PH-4AWT and WF-1F200A4P, match the form factor but have a lower current rating of 2A compared to the original's 3A. This makes them parametric alternatives that require careful engineering review before use.