Termination and assembly
The SP-2541 is a 2.50 mm (3/32") industry-diameter phone plug from CUI Devices, with a male plug body and four conductors arranged as a TRRS (tip-ring-ring-sleeve) contact set. Termination is solder-only — the brass contacts are nickel-plated and rated for 1 A at 12 VDC. The plug has no internal switch and is unshielded, which keeps the body diameter at 0.091" (2.30 mm) for a slim in-line fit.
