Is there a pin-compatible replacement for B05B-PASK-1(LF)(SN)?

No, a direct pin-compatible replacement is not readily available. While candidates match the 5-pin, 2.0mm pitch layout, they differ in critical electrical ratings (current) and mechanical features (locking mechanism).

What risks should I check before replacing B05B-PASK-1(LF)(SN)?

Before replacing, you must verify two main risks: 1) The lower current rating (typically 2A vs 3A) is safe for your application. 2) The lack of a secure locking feature is acceptable for your product's operating environment.

B05B-PASK-1(LF)(SN) Alternatives, Datasheet & Cross Reference | JST

The JST B05B-PASK-1(LF)(SN) is a 5-pin, 2.0mm pitch vertical header known for its 3A current rating and secure locking feature. Finding a direct replacement is challenging, as most alternatives offer lower current ratings and a less robust friction-lock mechanism.

AI replacement insight

Electrical riskhigh

All candidates have lower current ratings (1.5A-2A vs 3A), posing a fire or failure hazard if not derated.

Package riskhigh

Target has a positive lock (JST PA series); candidates are friction-lock. This can lead to intermittent connections in high-vibration environments.

Sourcing risklow

Many 2.0mm 5-pin vertical headers exist, but finding one matching all key specs is difficult.

Can it be replaced directly?

No direct, drop-in replacement was found. All candidates have a lower current rating and lack the secure locking feature of the JST PA series.

Best replacement path

Use a candidate like ZX-HY2.0-5PLT that matches voltage and form factor, but requires careful verification of the lower 2A current rating and the different (friction-lock) mating style.

Main risk

The primary risks are electrical overstress due to lower current ratings and mechanical connection failure from the lack of a positive locking mechanism.

Recommended alternatives

A vertical 5-pin header with matching pitch and voltage, but lower current rating and different locking style.

View details

Alternative comparison matrix

Feature / factor	B05B-PASK-1(LF)(SN)	ZX-HY2.0-5PLT	HC-HY-5A	Compatibility / risk
Pinout	5	5	5	5 — Pin count and pitch match.; HC-HY-5A: Pin count and pitch match.
Package	Through Hole, Vertical, Shrouded w/Lock	Through Hole, Vertical	Through Hole, Straight	Through Hole, Vertical / Through Hole, Straight — Target is JST PA series (locking); candidate is HY series (friction lock). Mating compatibility must be verified.; HC-HY-5A: Target is JST PA series (locking); candidate is HY series (friction lock). Mating compatibility must be verified.
Current	3 A	2.0 A	2 A	2.0 A / 2 A — Candidate has a 33% lower current rating.; HC-HY-5A: Candidate has a 33% lower current rating.
Voltage	250 V	250 V	250 V	250 V — Voltage rating matches.; HC-HY-5A: Voltage rating matches.
Temperature	-25°C to +85°C	-25°C to +85°C	Not specified	-25°C to +85°C / Not specified — Operating temperature range matches.; HC-HY-5A: Operating temperature not found in provided data.

Application & sourcing insights

Questions & answers

The best alternatives, such as ZX-HY2.0-5PLT, match the voltage and physical footprint but have a lower current rating (2A vs 3A) and a different locking style. Thorough testing is required.