Is there a pin-compatible replacement for HC-1.25-6Y?

While several 6-pin, 1.25mm pitch housings exist, a direct pin-for-pin and mechanically identical replacement is not confirmed. Mechanical fit with the existing header must be checked via datasheets.

What risks should I check before replacing HC-1.25-6Y?

Key risks include: 1) a lower operating temperature range on alternatives, 2) slight mechanical differences in housing dimensions and locking features, and 3) compatibility with the specific crimp terminals used.

HC-1.25-6Y Alternatives, Datasheet & Cross Reference | HCTL

HC-1.25-6Y is a 6-pin, 1.25mm pitch connector housing. Alternatives from common connector families exist but require careful review of operating temperature and mechanical compatibility with the mating header.

AI replacement insight

Electrical riskmedium

Most alternatives have a lower temperature rating (-25 to +85°C) vs the target's (-40 to +105°C).

Package riskmedium

While pitch and pin count match, housing dimensions and locking features may differ slightly, requiring mechanical verification.

Sourcing risklow

The 1.25mm pitch connector family is very common with many manufacturers.

Can it be replaced directly?

No direct drop-in replacement has been verified. Candidates like JST GHR-06V-S are functionally similar but have a narrower operating temperature range that must be reviewed.

Best replacement path

Use a cross-vendor family part like JST GHR-06V-S or CJT A1251H-6P, but you must verify that their lower temperature rating is acceptable for your application.

Main risk

The primary risk is the lower maximum operating temperature of most alternatives, which could lead to failure in high-temperature environments.

Recommended alternatives

A functional alternative with matching pitch, pin count, and ratings, but a narrower temperature range.

View details

Alternative comparison matrix

Feature / factor	HC-1.25-6Y	A1251H-6P	GHR-06V-S	Compatibility / risk
Gender	Housing	Housing	Housing	Housing — Both are female housings.; GHR-06V-S: Both are female housings.
Pitch	1.25mm	1.25mm	1.25mm	1.25mm — matched; GHR-06V-S: matched
Positions	6	6	6	6 — matched; GHR-06V-S: matched
Temperature	-40°C to +105°C	-25°C to +85°C	-25°C to +85°C	-25°C to +85°C — Candidate has a narrower operating temperature range (verified from datasheet).; GHR-06V-S: Candidate has a narrower operating temperature range.
Current	1A	1A	-	1A — matched
Family	HCTL HC Series	-	JST GH Series	JST GH Series — Common cross-family alternative, requires mechanical check.

Application & sourcing insights

Questions & answers

JST GHR-06V-S and CJT A1251H-6P are strong functional alternatives from the common 1.25mm pitch connector family. However, you must verify their lower temperature rating (-25 to +85°C) is sufficient for your design.