Siemens MBK125A EQ8682 is a Type EQ low-voltage, two-pole main breaker kit that installs a 125 A main breaker (EQ8682) into Siemens EQ-series load centers designed to accept that main breaker. It is a 120/240 V AC device with a 22 kA short‑circuit interrupt rating at 240 V, providing a dedicated main disconnect for the panel and enabling conversion from a main-lug configuration to a main-breaker arrangement. The MBK125A is specifically intended for use with Siemens panels that support the EQ8682 main breaker, delivering a 2-pole, 125 A protection path for the electrical system.
