Is there a pin-compatible replacement for HC-1.25-4PWT?

Yes, parts like ZX-MX1.25-4PWT are mechanically pin-compatible. However, they are not electrically equivalent and have significantly lower voltage and current ratings, requiring careful engineering review.

What risks should I check before replacing HC-1.25-4PWT?

The primary risk is electrical. Verify your circuit's actual operating current and voltage are well below the 1A/125V rating of common alternatives. Also, confirm the mechanical dimensions and PCB footprint from the datasheets to ensure a perfect fit.

HC-1.25-4PWT Alternatives, Datasheet & Cross Reference | HCTL

Finding a substitute for the HC-1.25-4PWT is challenging due to its high 2A/250V rating for a 1.25mm pitch connector. While several parts match its physical form, they have lower electrical ratings, posing a risk.

AI replacement insight

Electrical riskhigh

All found alternatives have significantly lower current and voltage ratings.

Package risklow

Several alternatives match the SMT, right-angle, 4-pin, 1.25mm pitch form factor.

Can it be replaced directly?

No, there are no direct 1-to-1 replacements for HC-1.25-4PWT in our catalog that match its 2A/250V rating. All form-factor compatible parts have lower electrical specifications.

Best replacement path

No direct drop-in replacements with matching electrical ratings were found. Alternatives require careful review of derated current and voltage.

Main risk

Electrical overstress. Using a 1A/125V rated connector in a 2A/250V application poses a significant fire and safety hazard.

Recommended alternatives

Mechanically similar 4-pin header but with significantly lower voltage and current ratings. Requires careful engineering review.

View details

Alternative comparison matrix

Feature / factor	HC-1.25-4PWT	WAFER-MX1.25-4PWB	ZX-MX1.25-4PWT	1.25-4PWB	Compatibility / risk
Package	1.25mm Pitch SMT Header	SMT	-	-	1.25mm Pitch SMT Header — Package type and orientation match.
Pitch	1.25mm	1.25mm	-	-	1.25mm — Pitch matches.
Voltage	250V	125V	-	-	125V — Significantly lower voltage rating.
Current	2A	1A	-	-	1A (Est.) — Current rating not specified, assumed 1A based on class. Target is 2A.

Application & sourcing insights

Questions & answers

Several connectors like Megastar's ZX-MX1.25-4PWT offer the same 4-pin, 1.25mm right-angle SMT footprint, but with lower 1A/125V ratings. These are only suitable if your application can tolerate this electrical downgrade.