Product Introduction
The 78511-409HLF is a 9-position, single-row unshrouded header from the Amphenol ICC BERGSTIK® II series. It uses square male pins on a standard 0.100" (2.54mm) pitch, terminated by through-hole soldering into a PCB. This is a basic board-to-board interconnect — an unshrouded pin header meant to mate with a matching 0.100" pitch receptacle, commonly used in prototyping, test fixtures, and internal board-to-wire or board-to-board connections where the mating half is secured by a separate locking mechanism or by the enclosure itself.
Key Specs and What They Mean for Your Fit
The 0.100" pitch is the industry-standard breadboard spacing — any 0.100" female socket strip or IDC receptacle will mate with it. The 9 positions mean this is a single-row, 9-pin header; the BOM line must match exactly. The 5A per-contact rating is typical for this pin size and pitch, but the tin-on-tin contact interface (100 µ" thick on the mating side) means this header is best suited for applications with a limited number of mating cycles — think a few dozen insertions over its life, not frequent field service. The UL94 V-0 black housing gives it the flame rating required for equipment inside an enclosure.
Mating and Termination
This is an unshrouded header with push-pull fastening — there's no latch, so the mating receptacle must rely on its own retention (e.g., a friction lock or a separate strain relief). The overall contact length is 0.538", with a mating pin length of 0.318" and a solder tail of 0.120". The square pins are phosphor bronze with a tin finish on both the mating and solder tails. It mates with any standard 0.100" pitch female socket, such as the BERGSTIK II receptacle housing or a generic female header strip.