The TE Connectivity 5504655-1 is an SC duplex plug for singlemode fiber, built around a ceramic ferrule and a snap-in latch that gives a positive click on mate. It accepts 3.0 mm jacketed cable — the standard diameter for premises patch cords and outside-plant tails — and comes with both a dust cap and a strain relief boot fitted from the factory. The blue PBT housing with glass fill is the usual SC duplex colour code for singlemode, and the free-hanging in-line body means no panel cutout is needed: it terminates the cable end and mates directly into a bulkhead adapter or transceiver port.
Rated for 200 mating cycles, which is the standard durability for an SC connector — enough for patch panel cross-connects and field re-terminations, though not a high-cycle lab or automated-test interface. The ceramic ferrule holds the 126 µm cladding diameter fiber in precision alignment; the polyethersulfone (PES) internal body and PBT outer housing are both glass-filled for dimensional stability across the operating temperature range.