Is there a pin-compatible replacement for ZX-MX1.25-3PJK?

Possibly, but it requires verification. Parts like HC-1.25-3Y and GHR-03V-S match the pin count and 1.25mm pitch, but are not guaranteed to be drop-in replacements without first comparing the mechanical drawings for form, fit, and locking features.

What risks should I check before replacing ZX-MX1.25-3PJK?

The primary risk is mechanical mismatch. Check the connector's height, width, depth, and especially the style and position of any locking latches or polarization keys. An incorrect fit can lead to unreliable connections or prevent mating entirely.

ZX-MX1.25-3PJK Alternatives, Datasheet & Cross Reference | Megastar

ZX-MX1.25-3PJK is a 3-position, 1.25mm pitch connector housing. Several functional alternatives exist from manufacturers like JST and HCTL, but require careful comparison of mechanical drawings to ensure proper fit and mating.

AI replacement insight

Package riskhigh

Mechanical fit (locking, keying, dimensions) is not guaranteed and must be verified from datasheets.

Electrical risklow

Most alternatives have matching or superior voltage/current ratings.

Can it be replaced directly?

There are no pre-verified direct replacements. However, several parts like HC-1.25-3Y and GHR-03V-S are strong functional alternatives that require mechanical verification via datasheet comparison.

Best replacement path

The JST GHR-03V-S is a strong candidate from a major brand, representing an industry standard that the target likely emulates. Verifying mechanical compatibility against the GHR-03V-S datasheet is a reliable path.

Main risk

The main risk is mechanical incompatibility. Housings may have different locking latches, keying, or external dimensions that prevent proper mating, even if the pitch and pin count match.

Recommended alternatives

A JST GH series housing with wider temperature range; verify mechanical fit and material compatibility.

View details

Alternative comparison matrix

Feature / factor	ZX-MX1.25-3PJK	GHR-03V-S	HC-1.25-3Y	A1257H-3P	Compatibility / risk
Package	Connector Housing	Receptacle Housing	Housing	Housing	Receptacle Housing — Package type matches.; HC-1.25-3Y: Package type matches.; A1257H-3P: Package type matches.
Pitch	1.25mm	1.25mm	1.25mm	1.25mm	1.25mm — Pitch is identical.; HC-1.25-3Y: Pitch is identical.; A1257H-3P: Pitch is identical.
Material	PA66	PBT	-	Nylon 66	PBT / Nylon 66 — Material differs (PBT vs PA66), check application requirements.; A1257H-3P: Material matches target's PA66.
Temperature	-25°C to +85°C	-40°C to +105°C	-25°C to +85°C	-	-40°C to +105°C / -25°C to +85°C — Wider operating temperature range.; HC-1.25-3Y: Operating temperature range is identical.
Voltage	50V	-	125V	Unknown	125V / Unknown — Higher voltage rating provides more margin.; A1257H-3P: Voltage rating not found in provided data.
Current	1.0A	-	1A	-	1A — Current rating matches.

Application & sourcing insights

Questions & answers

The best alternative is likely the JST GHR-03V-S, as it's an industry-standard part from a major manufacturer. However, you must verify its mechanical drawings against your application's requirements before ordering.