It sits in parallel with the 12 V adapter, so when the mains drops the device does not see the gap. No inverter stage, no transfer click, no truck roll for a two-second outage.
Sample from 1 unit · batch from 20 · CE / RoHS / UN38.3 with the goods
Most of the support tickets on this product come from one thing: it was sold for a load it cannot carry. Here is the honest split, before you order anything.
| Device | Typical load | Fits? | Which model |
|---|---|---|---|
| Router / ONU | 12 V, 0.5–1 A | Yes | PE-DU18 |
| Single IP camera | 12 V, 0.5–1 A | Yes | PE-DU18 |
| Mobile CCTV trailer | 12 V DC | Yes | PE-DU18-C |
| Control cabinet panel | 12–18 V DC | Yes | PE-DU18-C |
| PoE switch / PoE injector | 48 V | No | Ask us for a 48 V option |
| NVR with 4 cameras | 12 V, 3 A and up | No | AC UPS, another line |
| 24 V PLC / industrial rail | 24 V | No | Ask — 24 V input on request |
* If your device is not on this list, send a photo of the adapter label. You get a yes or a no the same day — we would rather lose the order than ship a unit that browns out under load.
PE-DU18 is built for the desk and the wall box. PE-DU18-C takes a wider input window and mounts into a cabinet.
For ISP installers and CCTV contractors. Goes between the adapter and the device, no re-wiring of the customer's setup.
For control-cabinet builders and trailer installations, where the supply is already DC and there is no socket to plug into.
Full specification sheets, including the discharge curve and the connector list, go out with the sample. Ask for them if you need them before that.
A mini AC UPS takes the battery voltage up to mains and back down again inside your device. Two conversions, both of them heat. A DC unit hands the device the voltage it already wanted.
These units sit in parallel with the adapter rather than switching to it. The device keeps running on the same rail — no reboot, no reconnect, no log entry.
Inside a wall box, on a DIN rail, in a trailer. There is no room for a shoebox UPS and nobody is going to service one at a remote site.
One unit at unit price, express, no batch commitment. Run it against your own load for a week before you decide anything.