Description
The OP‑SBWF03 is a compact, mains‑rated timeswitch that gives independent, app‑controlled on/off scheduling for three separate 230V outputs from a single pattress‑mounted unit. It’s aimed at straightforward domestic and light‑commercial duties where you want to replace a mechanical programmer or add remote control to existing circuits — for example controlling hot water, two heating zones or low‑power pumps — without running separate wired timers for each output.
Operation is simple: the unit mounts over a standard single pattress box, connects into the home’s 2.4 GHz Wi‑Fi and is configured using a smartphone app. Each channel is a normally‑open switched 230V output with its own schedule; you can also use the three on‑device buttons for manual override. The installer‑oriented spec and a familiar smartphone interface make it practical for retrofit work where you want app control but don’t want to rework central wiring significantly.
Key specifications
- Model / reference: OP‑SBWF03 (Optimum)
- Three independent 230V switched outputs, normally open
- Supply 220–240V AC, 50 Hz; resistive rating 5 A per channel, 15 A total
- WLAN 802.11 b/g/n (2.4 GHz only); smartphone app control (Smart Life)
- Minimum switching interval 1 minute; 24‑hour and 7‑day programming
How it controls things and what it suits
Each of the three channels can run its own on/off programme on a 24‑hour or 7‑day basis, and the unit stores multiple on/off events (program capacity is shared between channels). That makes the OP‑SBWF03 a good fit where you want separate timed control without separate mechanical timers or multiple plug‑in smart sockets — for example domestic hot water plus two heating zones, small circulating pumps, or timed ventilation. The device provides local manual override buttons for each channel and also supports remote switching from the app when you’re away from the property.
Bear in mind the electrical limits: the outputs are rated for resistive loads up to 5 A each (15 A total). Inductive loads — motors, some pumps and valve actuators — have a lower allowable rating (the product documentation shows a reduced inductive rating) and high inrush currents may require a contactor or relay. It is not designed to directly drive high‑current heaters, immersion elements or many modern LED fittings without additional switching hardware.
Installation and practical cautions
The OP‑SBWF03 is designed to mount directly on a standard single pattress box and to be wired into fixed mains circuits. That means it must be installed by a competent person or qualified electrician — you are working with permanent live wiring inside the pattress box. Wiring diagrams in the installer manual show common arrangements such as controlling three 2‑port zone valves (domestic hot water plus two heating zones), so it’s clearly intended to integrate with standard heating wiring, but check the manual for the exact terminal labelling before you connect anything.
Because the unit only supports 2.4 GHz Wi‑Fi (802.11 b/g/n) it won’t pair with 5 GHz‑only networks; the router must allow 2.4 GHz devices and be reachable from the installation location. The unit’s firmware and app ecosystem have evolved — users are encouraged to use the Smart Life app for setup and ongoing control. The manufacturer/distributor documentation flags a migration from an older C‑Home app, so check which app you need when commissioning.
Security, voice and everyday use
From a connectivity standpoint the OP‑SBWF03 uses standard cloud‑backed smartphone control and supports voice control with Amazon Alexa and Google Home once the device is set up in the app. Communications security is described as AES encryption with dynamic key allocation and HTTPS for the connection channel. For everyday use you’ll get the convenience of creating weekday/weekend schedules, grouping devices (within the app) and remote switching via mobile data when you’re out of range.
What it doesn’t do well
- It’s not a high‑power switch: channels are limited to 5 A resistive each — use contactors for heaters, high‑current pumps or any load with significant inrush.
- Not suitable to directly switch many LED/discharge lights without a contactor — the manual specifically warns against this.
- Only works on 2.4 GHz Wi‑Fi; if your router restricts 2.4 GHz devices you may need configuration changes.
Overall, the OP‑SBWF03 is a practical, inexpensive way to add app‑based scheduling and remote control to three separate mains circuits from a single, compact pattress‑mounted unit. It works well for two‑zone heating plus hot water arrangements and other low‑power switching tasks where straightforward installation and app convenience are priorities — provided you respect the load limits and use contactors or relays where higher currents or inductive loads are present.
