Protect Relay
USL-Relay-US
Compact SuperLink relay designed with I/O interfaces for seamless integration with third-party sensors and signaling devices.SpecificationsOverview Dimensions 50 x 47.6 x 28 mm (2 × 1.9 × 1.1") Mounting Adhesive,...
Or build it into a bundle — save up to 15% ↓What it is, and who it is for.
What it needs to run
PoE power and a UniFi Network host. If you have neither, both are in the bundle builder below.
Compact SuperLink relay designed with I/O interfaces for seamless integration with third-party sensors and signaling devices.
Specifications
Overview
| Dimensions | 50 x 47.6 x 28 mm (2 × 1.9 × 1.1") |
| Mounting | Adhesive, wall and DIN rail mount |
| UniFi Application Suite | Protect |
Performance
| Connectivity | SuperLink (Proprietary) |
| US | 915.6–927.6 MHz |
| EU | 865.1–869.5 MHz |
| SuperLink | 1 dBi |
| SuperLink | 14 dBm |
| SuperLink | 2 km (1.2 mi) Line of Sight (LOS) |
Hardware
| Power Method | 12V DC / 24V DC / 48V DC |
| Weight | 100 g (3.5 oz) |
| Enclosure Material | Polycarbonate |
| Mount Material | Polycarbonate |
| Buttons | (1) Factory reset (1) Test button |
| Output | O1/COM/O2 Dry contact only (12-48V DC, 12-240V AC) 10A/port, UL total max: 12A IEC total max: 16A |
| Input | I1/I2 Dry contact only Open/Short (GND) Integrated 5V TVS protection |
| Power | VDD/GND 12–48V DC, max. 48V Integrated over-temperature protection (OTP) at 85°C (185°F) |
| LEDs | (1) LoRa, Status: RGBW (2) Signal input, Relay output: W |
| Ambient Operating Temperature | 0 to 40° C (32 to 104° F) |
| Ambient Operating Humidity | 10 to 90% noncondensing |
| Certifications | CE, FCC, IC |
Software
| Web Application | UniFi Protect |
| Mobile App | UniFi Protect iOS™ and Android™ |
Downloads & documents
Build around the Protect Relay.
It's already in your kit below. Add a gateway and PoE and the discount starts working. Discount tiers climb with the bundle — the bars fill as you build.
Type your address. We'll spec the building.
Square footage, floors, rooms, construction type — turned into an AP count, a switch size, and a gateway that fits. No guesswork, no overbuying.
Four quick questions size the kit. Property-records autofill is in the build phase.
Enter an address and the plan appears here —
property facts first, then the kit.
Pick the right one, not the biggest one
The honest line-up from cameras & nvrs. Most buyers reading this page should buy the middle column.
G4 Doorbell Pro PoE Gang Box Mount
Protect Relay
Camera G5 BulletAsked before checkout
The questions our support inbox actually gets.
Does it ship the same day?+
Orders placed before 2 PM ET on a business day leave the same day from our bench in Altamonte Springs, FL. Tracking is emailed the moment the label prints.
What if it's the wrong size for my building?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: send us your floor plan first and we'll size the kit for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue overseas.
How does the bundle discount work?+
Add items to a kit in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole kit.