New Siemens B12000S01 Single Pole 20 Amp 120/240 Volt Breaker W/ 120V Shunt Trip. Thank you for shopping with American West Surplus! We also need to know if you have a dock or forklift, and if your location is a business. All items, unless otherwise specified, are guaranteed to be fully functional and not DOA.All items that are listed as "tested" undergo a full shop inspection to ensure they are in proper working condition. We primary injection test and secondary test all breakers that are listed as tested. We are open Monday through Friday. If you need weekend assistance we can always plan arrangements. If you have old, used, or new surplus equipment to liquidate please let us know.