Product Info Catalog Electrical & Lighting Fuses & Circuit Breakers Circuit Breaker Panels Murray 40A Single Pole Circuit Breaker Murray 40A Single Pole Circuit Breaker Request a Quote UPC: 40892518924 Manufacturer: Siemens Industry Inc SKU: 600585 Model Number: MP140 Murray, 40A Single Pole Circuit Breaker, 1" Space, 120V, Bulk.