
XUNDA
Potential upgrade with better temp range and matching flammability, but voltage rating and mechanicals need verification.
WAFER-XH254JK-4A is a 4-pin, 2.54mm pitch straight male header from HANBO, rated for 3A and 250V with a UL94V-0 flammability rating. Finding a substitute requires careful review of mechanical drawings and material specifications.
Candidates are straight through-hole headers, but precise footprint and dimensions must be verified from datasheets.
Most candidates match the 3A/250V rating, but one lacks a specified voltage rating.
Alternatives are from different manufacturers, ensure they meet regional and quality requirements.
No verified direct drop-in replacement has been identified. Several functional alternatives exist but require engineering review for mechanical fit and material differences.
XDZ254-1-04-Z-2.5-G1 is a potential upgrade if its voltage rating is confirmed, due to superior temperature range and matching flammability rating. Otherwise, ZX-XH2.54-4PZZ-R is a close functional match.
The primary risks are mechanical incompatibility and material differences, specifically the housing's flammability rating.

XUNDA
Potential upgrade with better temp range and matching flammability, but voltage rating and mechanicals need verification.
| Feature / factor | WAFER-XH254JK-4A | XDZ254-1-04-Z-2.5-G1 | XY-XH2.54-4A11-R | ZX-XH2.54-4PZZ-R | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 2.54mm Header, Straight | Through Hole, Straight | Through Hole, Straight | Through Hole, Straight | Through Hole, Straight — Orientation matches, but full mechanicals need verification.; XY-XH2.54-4A11-R: Orientation matches, but full mechanicals need verification.; ZX-XH2.54-4PZZ-R: Orientation matches, but full mechanicals need verification. |
| Current | 3 A | 3.0 A | 3.0 A | 3.0 A | 3.0 A — matched; XY-XH2.54-4A11-R: matched; ZX-XH2.54-4PZZ-R: matched |
| Temperature | -25°C to +85°C | -40°C to +105°C | - | - | -40°C to +105°C — Wider operating range. |
| Material | Nylon66, UL94V-0 | PBT+30%GF, UL94V-0 | PA66 UL94V-2 | PA66 UL94V-2 | PBT+30%GF, UL94V-0 / PA66 UL94V-2 — Flammability rating matches.; XY-XH2.54-4A11-R: Weaker flammability rating and red color.; ZX-XH2.54-4PZZ-R: Weaker flammability rating. |
| Plating | Tin (Assumed) | Gold | - | - | Gold — Upgrade from likely tin plating; check mating connector compatibility. |
| Pin Count | 4 | - | 4 | 4 | 4 — matched; ZX-XH2.54-4PZZ-R: matched |
| Voltage | 250 V | - | - | 250 V | 250 V — matched |
XDZ254-1-04-Z-2.5-G1 is a promising alternative with a better temperature range, but its voltage rating and mechanical fit must be verified. ZX-XH2.54-4PZZ-R is another strong option if a lower flammability rating (UL94V-2) is acceptable.