What this shunt does on a 0.100-inch header
The 1-881545-4 is a 2-position open-top shunt from the AMPMODU series, designed to short a pair of 0.100" (2.54mm) pitch header pins — typically used for configuration jumpers, address selection, or test-point bridging on prototype and production boards. Rated 3A per contact, it handles signal-level current only — the tin-plated contacts are suited for occasional reconfiguration, not repeated hot-swap duty.
Mated height is 0.228" (5.80mm) above the header body — the open-top profile leaves the pin tips exposed for probing or visual continuity check without removing the shunt.