The 640387-2: Right-angle through-hole header, 2 positions on 0.156" (3.96 mm) pitch — the board footprint is two holes spaced 3.96 mm apart, with the header body sitting perpendicular to the PCB. Mates with MTA-156 receptacle housings and their IDC or crimp contacts. The single-wall shroud guides the receptacle straight on; the friction lock holds the pair mated without a secondary latch — adequate for low-vibration bench or panel applications, not for engine compartments or heavy shock.
Rated 600 VAC — this is the maximum working voltage between adjacent circuits. At 105°C maximum operating temperature, the thermoplastic glass-filled housing (UL94 V-0) holds its dimensional stability under load. In dusty or corrosive air, the tin surface can frett under vibration; gold-plated alternatives in the MTA-156 family exist for higher cycle life or harsher conditions.