Reliance Electric 705330-27RB Industrial Relay

Reliance Electric 705330-27RB is a legacy industrial component from Reliance Electric, a part number that surfaces in vintage control-system inventories and is linked to the Allen-Bradley/Rockwell Automation lineage. Across several third-party listings, 705330-27RB is described as a capacitor, identifying this model specifically as a capacitor module used within electrical control circuits rather than a relay in those catalogs. The designation appears in surplus and used equipment catalogs and in e-commerce listings, indicating its presence in older Reliance Electric equipment. The core part number 705330-27RB anchors this item within the broader family of Reliance Electric capacitors used in historic industrial automation assemblies. Buyers interested in this model typically verify the exact electrical ratings and physical form factor with the seller, as those details can vary between listings while the core part number remains constant.