Siemens 3RT1926-1BB00 Varistor Surge Suppressor

Siemens 3RT1926-1BB00 Varistor Surge Suppressor is a compact MOV-based accessory that clamps transient spikes on the control circuit of Siemens 3RT contactors, helping protect the coil and stabilize operation in industrial panels. It is designed for mounting onto Siemens 3RT contactors in frame sizes S0, S2, and S3, integrating with the 3RT family to provide localized surge protection at the point of control. Electrical ratings specify an AC control-voltage range of 24 to 48 VAC and a DC control-voltage range of 24 to 70 VDC, offering compatibility with common automation control circuits that use either AC or DC control supplies. Siemens Industry Mall catalogs the 3RT1926-1BB00 as a discontinued accessory, noting that it was deleted without replacement and identifying the Sirius 3RT2 family as its successor for newer installations. This part number is widely referenced by distributors and data sheets as a varistor-based surge suppressor for monitoring and protecting control-voltage lines on Siemens 3RT equipment.