USB micro A Plug for Field-Terminated Cable Assemblies
The Hirose ZX40-A-5S-UNIT is a shielded USB micro A plug from the ZX series, designed for free-hanging (in-line) cable termination via solder cups. It carries 5 contacts rated 1.8A per circuit at 30VAC, with gold-plated contacts that hold up through 10000 mating cycles — well beyond the typical USB connector for applications that see frequent connect/disconnect in field-service or test equipment. The housing is molded in UL94 V-0 rated material and the white insulation color aids visual identification during harness assembly.
The ZX40-A-5S-UNIT is marked obsolete by Hirose.
Termination is solder-only; the five contacts are soldered directly to the cable conductors. The shielded shell requires the drain wire to be soldered or crimped to the shield tabs for EMI containment per USB 2.0 requirements. No crimp terminals are used — this is a solder-only field termination.
What the 10000 Mating Cycles Mean for Field Service
The 10000-cycle rating is the standout spec on this connector. Standard USB micro connectors are typically rated for 5000 to 10000 cycles, but the gold plating here supports the full rated life without contact fretting. For a handheld tester or a diagnostic cable that gets plugged and unplugged multiple times per shift, this connector outlasts commodity USB parts. The free-hanging design also means the cable takes the strain — not a board-mounted jack — so the field-replacement cost is just the cable assembly, not a PCB rework.