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The Eelectron BK04PLL-4 is the 4-button kit in Helvetia white for the OL-U KNX switch SO08A01KNX (8 buttons, 16 channels, RGB swipe bar, thermostat). SO08A01KNX ships as bare hardware; the key set, a PO71 cover frame and an FO71A01 metal frame are ordered separately to suit the interior. This layout gives four full-width buttons, each key backed by its own RGB LED and freely programmable in ETS.
The finish is painted plastic, Helvetia white (the Swiss-standard white tone used by Feller-style wiring devices), the OL-U Regular Version, matching the PO71 painted plastic cover frames in the same colour code (-1 white, -3 black, -4 Helvetia white) for offices, hotels, multi-family and residential retrofits.
| Type | Key set (button kit) for OL-U KNX wall devices |
| Keys / layout | 4 keys: 4 full-width buttons |
| Finish / colour | painted plastic, Helvetia white (the Swiss-standard white tone used by Feller-style wiring devices) |
| Material | painted plastic |
| Compatible hardware | SO08A01KNX |
| Compatible cover frames | PO71A01xx, PO71A03xx, PO71A71 / A55 / A45 / A60 doubles |
| Device footprint | 71 x 71 mm (2.80 x 2.80 in) OL-U front |
| Weight (net, packed) | 0.13 kg (0.29 lb) |
| Manufacturer part no. / GTIN | BK04PLL-4 / 8054144523880 |
Fits SO08A01KNX. Other layouts in this colour: BK08PLL-4, BK24PLL-4, BK42PLL-4. Other colours: BK04PLL-1, BK04PLL-3. Matching frames: PO71A01PL-4, PO71A03PL-4, PO71A71PL-4. Mounting frames FO71A01-2M / -3M.
Passive accessory – no electrical rating. The OL-U KNX hardware it mounts on is CE certified; not UL/NRTL listed — verify local code requirements before specifying in US installations.
Datasheet (PDF) · Available to order.
Orders over $500 ship free within the USA (under 50 lbs). Orders under $500 carry a low cost shipping fee.
Most in-stock orders ship within 1–2 business days from Miami, FL. Delivery typically takes 3–5 business days depending on destination.
For freight or oversized orders, our team will contact you with a custom quote.
All KNXSupply products are covered by the manufacturer's warranty, ranging from 1 to 3 years depending on the brand. Warranty terms are fulfilled directly by the manufacturer.
If you experience any issue, contact us and we'll coordinate the claim process on your behalf.