Siemens Low Voltage Residential Specialty Load Centers 300-600 amp. Load Centers Type 1 Application Residential V. Rating 120/240V A. Rating 300A Phase 1PH Load Regulation 300A Wiring Conf 3w Bus Rating 300A Interrupt Rating 22000AIC Circuit Breaker Type MB No. Of Spaces 42S Cover Type EQ Size (H x W x D) 8x21x50 Mounting Surface