Factory Price Siemens MBK150 – 150A 2 Pole Main Breaker Kit

Built for residential power distribution, the Siemens MBK150 is a 150A main breaker conversion kit. It delivers reliable thermal-magnetic protection with a 22kAIC interrupt rating at 120/240VAC, serving as the primary panel disconnect. Mounts into legacy Siemens EQ series load centers using a plug-on connection. It accepts 1 AWG to 300 kcmil wire. Since EQ panels are discontinued, this is strictly a replacement component. Rated for 22kAIC, it ensures robust fault clearing capabilities.