SMUGDESK USB-C Female to DC 5.5×2.1 Female Power Adapter Cord

Purpose and audience

This USB-C female to DC 5.5×2.1 female adapter cable converts a Type-C power source to a standard 5521 DC jack. It is intended for hobbyists, technicians and DIY builders who need to power routers, CCTV cameras, LED strips or small industrial controllers from a USB-C supply. The cable carries power only and does not support data, video or OTG functions. Users must verify that voltage and current ratings match between source and device before connecting.

Capacity and headroom

The adapter passes power through a 5.5 mm outer and 2.1 mm inner barrel interface, a common size for low-voltage electronics. It comfortably handles typical router, camera and LED lighting loads within the limits of the connected USB-C supply. The cable has no active regulation, so it runs out of headroom if the source cannot deliver the current the end device demands or if the voltage level is mismatched. Always confirm ratings on both sides to avoid damage.

Practical limits of the interface

The USB-C female port accepts only a male Type-C plug from a power source; it does not negotiate power delivery profiles or transmit data. The 5521 DC female jack accepts a standard 5.5×2.1 mm male barrel plug from the target device. Because the cable is female-to-female, separate male plugs are required on both ends to complete the circuit. No driver or configuration is needed, but the user bears full responsibility for voltage and current compatibility.