Siemens EQ9685 MBK200 Plug-In Circuit Breaker

Siemens EQ9685 MBK200 is a 200-amp, two-pole main circuit breaker designed as a plug-in replacement for Siemens EQ load centers, providing the main overcurrent protection for single‑phase 120/240 V service in compatible panels. The MBK200 is marketed as the replacement main breaker kit for EQ-series panels and is described in Siemens load-center accessory guides and retailer catalogs as the EQ9685‑equivalent main breaker, intended to restore the original protection scheme without panel modification. This device carries a 22 kA interrupting rating at 240 V and uses plug-in mounting to simplify installation in EQ load centers that accept the EQ9685 main breaker.