ABB OTPS40FPN2 Over Temperature Protection Switch

ABB OTPS40FPN2 Over Temperature Protection Switch is a fourth-pole accessory for ABB OT-series switch-disconnectors (OT16–OT40F3) that adds independent thermal protection to the protected circuit. It mounts on the side of the main switch (DIN rail or base-mounted configurations) and is identified by the order code 1SCA105000R1001. When the over-temperature protection is engaged, the fourth pole opens to interrupt power, helping safeguard motors and connected equipment from overheating. In ABB catalogs this part is listed as OTPS40FPN2 with the associated order code 1SCA105000R1001, designed to extend protection coverage for OT16–OT40F3 platforms.