What This Coding Key Does in the Z-PACK System
The TE 3-100526-2 is a Z-PACK series receptacle coding key in brilliant blue. It is an accessory — not a connector — that fits into the Z-PACK backplane receptacle housing to enforce a specific keying position. This prevents mating a wrong header-receptacle pair in a multi-connector backplane, which is the kind of mistake that takes down a whole card cage and costs a shift to debug.
Sourcing This Key
The Brilliant Blue colour is the visual identifier; confirm the keying position code against your Z-PACK backplane layout before ordering.