4 PIN MALE CONNECTOR 5-position single-row shrouded male header connector belonging to the universally adopted AMPMODU Mod IV/V series.The primary electrical function of this component is to serve as a keyed wire-to-board signal routing interface soldered directly into a printed circuit board (PCB), providing a secure latching point for incoming wire harnesses.The design architecture centers around a standard 2.54 mm (0.100 inch) pin pitch spacing featuring 0.025-inch (0.64 mm) square post contacts.The defining physical feature of this variant is its shrouded (polarized) housing box, molded from a high-temperature, flame-retardant glass-filled thermoplastic. The shroud features an integrated mechanical keying slot that prevents mis-mating or accidental reverse-polarity installation of the female plug.The 5 square post contacts are stamped out of a high-conductivity copper alloy or phosphor bronze, featuring a high-reliability selective gold plating on the primary mating interface, transitioning to tin plating over the straight through-hole solder tails.The connector is configured in a vertical orientation, utilizing straight through-hole pins to establish a vibration-resistant, low-profile connection point on the board.Industry Equivalents (Cross-References)The TE Connectivity 87348-5 is the active direct factory replacement code designation, representing the identical component layout manufactured under current global catalog guidelines.The Molex SL Series 70543-0004 serves as a prominent direct third-party industry alternative, providing an identical 5-position, 0.100-inch pitch shrouded vertical header that drops into the same PCB pin footprint.The Samtec HTSS-105-01-G-D (configured in a single-row layout variation) functions as a high-reliability precision alternative, mirroring the shrouded geometry and gold-plated contact interfaces.The Amphenol / FCI Quickie 75869-304LF is a secondary commercial-grade drop-in substitute choice, aligning perfectly with the polarized box walls and grid boundaries of the original AMP link.History of the ComponentThe lineage of this component belongs to AMP Incorporated (Aircraft Marine Products), the global interconnect pioneer founded in 1941 that engineered the foundational "AMPMODU" modular interconnect platform. AMP developed the shrouded Mod IV/V series during the mid-to-late 20th century to satisfy the demanding requirements of industrial computing and telecommunication racks, where field technicians frequently bent pins or plugged wire harnesses in backward.By surrounding the delicate 0.025-inch square posts with a protective plastic box wall (shroud), AMP completely eliminated the risk of bent pins during rough handling. Furthermore, the polarization slots automated the alignment process on fast-paced assembly lines, ensuring that error-free connections could be made in blind or dark enclosure spaces.Following Tyco International's acquisition of AMP in 1999, the production lines were absorbed into Tyco Electronics and subsequently rebranded under the current TE Connectivity global catalog. Because the 2.54mm shrouded single-row grid remains a fundamental building block across medical equipment, robotics, and industrial instrumentation, the design architecture continues to serve as an active industry standard worldwide.Actual Product Applications (Makes and Models)The Commodore Amiga 2000 Personal Computer integrated these 5-position shrouded AMP header blocks across its motherboard to anchor internal data-link cables, such as the floppy disk drive LED status arrays and internal speaker lines.The HP 8591E Portable RF Spectrum Analyzer utilized these small shrouded 5-pin headers on its internal power distribution boards to cleanly route secondary low-voltage DC logic channels to independent peripheral sub-modules.The Allen-Bradley SLC 500 PLC Processing Units regularly employed these vertical polarized pins inside their diagnostic communication modules to safely attach internal battery backups and real-time clock boards without risking accidental short-circuits.
