FAKRA SMB Plug, Code C — 50 Ohm Crimp for RG-174/316 Coax
The FA1-NCSP-C01-1: The Code C keying — identified by the blue housing and a specific mechanical keyway — locks into the matching Code C FAKRA receptacle and won't mate with a Code A or Code Z jack, so you don't plug a GPS antenna feed into a cellular radio port by mistake.
Cable and Termination Fit — What Coax It Takes
The cable group covers RG-174, RG-188A, RG-316, LMR-100, and M17/119-RG174 — all 50 Ohm flexible coax. If you are field-terminating a spare on a wet line, the crimp tool die must match the ferrule diameter for that specific cable jacket; a loose crimp lets the shield pull back and the impedance drifts.
Code C vs Other FAKRA Codes — What Changes
The FAKRA standard uses a colour-and-keyway system so that a Code C plug (blue housing, Signal function) cannot be inserted into a Code A or Code Z receptacle. The FA1-NZSJ-C01-0, for example, is a Code Z jack with a latch lock and a blue Water housing — different keying and a different mating half. The RF performance is the same 50 Ohm, 4 GHz ceiling, but the mechanical interlock is code-specific. If your BOM calls for Code C, stick with this FA1-NCSP-C01-1; a Code Z jack will not latch.