
HanElectricity
A 2x4 8-pin header with matching pitch and current rating, and a higher voltage rating.
XKB Connection's X6521FV-2x04-C85D32 is a standard 2.54mm pitch, 8-pin dual-row female header. While no drop-in replacement is verified, several strong functional alternatives exist that match key electrical and mechanical specs, requiring only a quick datasheet review to confirm fit.
Connector housing height and exact footprint must be verified from datasheets to ensure mechanical fit and clearance.
Several candidates meet or exceed the target's voltage and current ratings.
There are several strong functional alternatives, but no confirmed direct pin-to-pin replacement without datasheet verification. Candidates from HanElectricity and HCTL match key specs but require review.
The best replacement path is to use a form-fit-function alternative like HanElectricity 2541FV-2x4P after verifying its mechanical drawing against your PCB layout.
The primary risk is mechanical incompatibility. While pitch and pin count may match, differences in housing height or footprint details can prevent a successful replacement.

HanElectricity
A 2x4 8-pin header with matching pitch and current rating, and a higher voltage rating.
| Feature / factor | X6521FV-2x04-C85D32 | 2541FV-2x4P | PM254-2-04-Z-8.5 | HC-JN254-2-04-Z | Compatibility / risk |
|---|---|---|---|---|---|
| Rows | 2 | 2 | 2 | 2 | 2 — Matches target's dual-row configuration.; PM254-2-04-Z-8.5: Matches target's dual-row configuration.; HC-JN254-2-04-Z: Matches target's dual-row configuration. |
| Pitch | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm | 2.54 mm — Standard pitch ensures mating compatibility.; PM254-2-04-Z-8.5: Standard pitch ensures mating compatibility.; HC-JN254-2-04-Z: Standard pitch ensures mating compatibility. |
| Current | 3 A | 3 A | 3 A | 3 A | 3 A — Current rating is identical.; PM254-2-04-Z-8.5: Current rating is identical.; HC-JN254-2-04-Z: Current rating is identical. |
| Voltage | 250 V | 550 V | 1000 V | Not specified | 550 V / 1000 V / Not specified — Higher voltage rating provides more margin.; PM254-2-04-Z-8.5: Significantly higher voltage rating.; HC-JN254-2-04-Z: Voltage rating must be verified from datasheet. |
| Package | Not specified | - | 8.5mm height | - | 8.5mm height — Specific housing height must be checked against board layout. |
The best alternative appears to be HanElectricity 2541FV-2x4P, as it matches the 2x4 configuration, 2.54mm pitch, and 3A current rating, while offering a higher voltage rating. However, you must verify its mechanical dimensions from the datasheet before ordering.