Allen-Bradley 100-A12NZ3S193-BSB12OL Contactor

Allen-Bradley 100-A12NZ3S193-BSB12OL is a Bulletin 100 Series contactor assembly from Rockwell Automation that pairs a 100-A12NZ3S Series B contactor with an integrated 193-BSB12 overload relay, packaged as a single OL-configured unit. The configuration is described by the presence of “Series B” and the combined part number, which is commonly listed as 100-A12NZ3S alongside a 193-BSB overload relay. The designation includes a 12A load rating, as indicated by the “12” in the model number and multiple catalog listings for 100-A12NZ3S3S configurations citing a 12A capacity in Series B form. The 193-BSB12 overload relay is a bi-metallic device used for motor-protection coordination with 100-series contactors and is specified for a current sensing range of 0.8–1.2 A. This overload relay is widely cataloged as 193-BSB12, and supplier pages describe it as the Bi-Metallic Overload Relay intended for use with Bulletin 100 contactors. Together, these components form a compact motor-control solution where overload protection is included in the same assembly, aligning with the Series B configuration and the overload-rated pairing described in vendor listings.