ST Multimode Fiber Optic Plug for Field Termination
The TE Connectivity 5504034-1 is a multimode ST connector plug from the LightCrimp XTC series, designed for simplex fiber optic cable termination. It uses a bayonet lock for quick, secure mating and accepts a 2.5 mm cable diameter, making it a standard fit for 2.5 mm jacketed multimode fiber. The plug includes a dust cap, epoxyless termination, and a built-in strain relief, so it ships field-ready without requiring epoxy or curing time. Typical insertion loss is -0.4 dB, which is within the expected range for a mechanically spliced multimode ST connector. The aluminum body with silver housing and black boot gives it a durable, corrosion-resistant shell for indoor or protected outdoor runs.
Cable Fit and Termination Notes
This plug is built for 2.5 mm cable diameter — the standard jacket size for 125 µm cladding multimode fiber. The epoxyless termination means you crimp the ferrule and strain relief directly onto the cable jacket and strength members, then cleave and polish the fiber end. No oven or curing fixture needed at the install point. The stainless steel ferrule provides a hard, stable end-face for repeated polishing and cleaning cycles. The bayonet lock gives a positive tactile engagement when mated to a standard ST receptacle or bulkhead adapter.