ABB OT16F3 Open Disconnect Switch

ABB OT16F3 is a three-pole, non-fusible open disconnect switch that provides a reliable manual isolation point in low‑voltage distribution. Listed to UL508 as a 3P 16A disconnect, the OT16F3 is designed for panels, machinery, and distribution boards where a dedicated isolator is required without fuses. Its compact physical footprint measures about 68 mm high, 35 mm wide, and 56 mm deep, and it weighs roughly 0.24 kg. The device uses a 6 × 6 mm shaft and requires about 8.8 lb-in of operating torque, which indicates a light touch for frequent operation. ABB catalogs identify OT16F3 as the alternate catalog number for a non‑fusible, 3‑pole switch with a 16A rating (UL508), confirming its intended role as an isolation switch rather than a protective device. Typical applications include service panels, control cabinets, and equipment enclosures where a straightforward disconnect is needed to isolate a circuit for maintenance or safety. As with ABB’s OT line, this switch is offered with compatible mounting and terminal options to fit various installations, always used strictly for isolation in accordance with electrical codes and safe‑work practices.