What risks should I check before replacing 3-644456-2?

Before replacing 3-644456-2, you should verify three key things: 1) Mechanical Dimensions: Check pin length, post size, and housing height from the datasheet. 2) Material Specifications: Confirm contact plating and housing flammability rating (e.g., UL94V-0) meet your application's requirements. 3) Electrical Ratings: Ensure the substitute's current and voltage ratings are sufficient.

3-644456-2 Alternatives, Datasheet & Cross Reference | TE Connectivity

The TE Connectivity 3-644456-2 is a common 2-position, 2.54mm pitch straight header. A strong pin-compatible alternative, 640454-2, is available from the same manufacturer, alongside several functional alternatives from other vendors that require datasheet verification.

AI replacement insight

Package risklow

Many candidates match the 2.54mm pitch and through-hole straight format, but detailed dimensions must be checked.

Electrical risklow

Most alternatives have comparable or superior voltage and current ratings for this simple connector type.

Sourcing riskmedium

While many options exist, material differences (plating, housing plastic) can affect long-term reliability and should be reviewed.

Can it be replaced directly?

Direct replacement for 3-644456-2 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Start with Datasheet verified or Strong match candidates for 3-644456-2, then review parametric alternatives for package and electrical fit.

Main risk

The primary risk when substituting headers is a mismatch in mechanical dimensions, such as pin length, post size, or housing height, which can affect mating and assembly.

Recommended alternatives

A likely pin-compatible replacement from the same manufacturer and product family.

View details

Alternative comparison matrix

Feature / factor	3-644456-2	640454-2	RE-H022TD-1190(LF)(SN)	WF-1A254A2P	Compatibility / risk
Package	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole — Mounting type matches.; RE-H022TD-1190(LF)(SN): Mounting type matches.; WF-1A254A2P: Mounting type matches.
Pin Count	2	2	-	2	2 — Pin count matches.; WF-1A254A2P: Pin count matches.
Pitch	2.54mm	2.54mm	2.54mm	2.54mm	2.54mm — Pin pitch matches.; RE-H022TD-1190(LF)(SN): Pin pitch matches.; WF-1A254A2P: Pin pitch matches.
Manufacturer	TE Connectivity	TE Connectivity	JST	BXCONN	TE Connectivity / JST / BXCONN — Same manufacturer and product family.; RE-H022TD-1190(LF)(SN): Cross-vendor alternative.; WF-1A254A2P: Cross-vendor alternative.
Current	Not specified	-	3A	2.0A	3A / 2.0A — Higher current rating may be an upgrade.; WF-1A254A2P: Current rating is comparable.

Application & sourcing insights

Questions & answers

Verified drop-in options for 3-644456-2 are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.