The Centalic RQ100-SC is a press-in receptacle for the 100 mil (2.54 mm) grid with a solder-cup termination. It is pressed into the fixture's probe plate once and the spring probe seats in it, so a worn probe can be pulled and replaced without unsoldering or rewiring the fixture.
It is the cost-effective alternative to an INGUN KS-100 body on the same 1.7 mm mounting hole, so a plate drilled for one takes the other. The SC variant terminates in a solder cup; the RQ100-WW is the same body finished with a wire-wrap post, and the choice between them follows how the fixture is wired rather than anything about the probe.
In Studio this receptacle is paired with the Centalic PQ100-B-4GG (needle tip) and PQ100-A-7.2GG (cupped tip) probes, and with the INGUN GKS-100 217 170 A 1500.
