Comnet PS12DC3A DIN Rail 12VDC Power Supply

The PS12DC3A is a 12VDC, 3 amp power supply built for DIN rail-mounted network gear in cabinets and enclosures. It solves a specific install problem: powering unmanaged gigabit switches and other 12V DC field equipment from the same rail hardware already carrying your switch, without adding a separate wall-mount brick or junction box. At 2 lbs, it mounts directly alongside the equipment it feeds, keeping cabinet wiring short and serviceable.

Compatibility

Rated output is 12VDC at 3A (36W), sized for Comnet's DIN rail unmanaged gigabit switch line and other 12V DC-input network devices sharing the same rail. Confirm the connected device's input voltage and current draw fall within the 12VDC/3A envelope before pairing — exceeding 3A total load will undersize the supply. For higher-draw equipment or multi-device rail runs, check Comnet's power and data management accessories for a higher-current option in the same family.

Installation Notes

DIN rail mounting means no separate bracket or enclosure cutout — it clips onto standard 35mm rail next to the switch it powers, which is the standard layout for telecom closets and outdoor cabinets already standardized on rail-mount gear. Because it's a rail-mount unit rather than a plug-in adapter, plan cabinet rail space and DC wiring runs before rough-in rather than after.

This power supply carries a lifetime manufacturer warranty, which is worth factoring into total cost of ownership on projects where field power supplies are the component most likely to fail first. Pair it with network switches from the Comnet catalog when specifying a full DIN rail cabinet build, and review a PoE planning guide if the same cabinet also carries PoE-powered devices on separate supplies. For camera runs terminating in the same enclosure, pair with NVRs sized to the channel count on that switch.