4.20 mm Pitch, 4-Circuit Dual-Row Header — What It Is
This is a TE Connectivity AMP MR (Miniature Rectangular) series male header, order code 640499-3. Style is Board to Cable/Wire — a through-hole soldered header that mates with a crimp-socket receptacle. The 4-wall shroud and latch lock keep the pair engaged under moderate vibration, typical for power supplies, appliances, and industrial control panels.
Pitch, Pinout, and Mating Half
Mating pitch is 0.165 inch (4.20 mm) and row spacing is the same 4.20 mm. The contact mating length is 0.220 inch (5.59 mm), post length 0.210 inch (5.33 mm) for through-hole soldering. All 4 positions are loaded. Mates with MR series crimp-socket housings that accept 20-24 AWG wire.