285-Series Thermal Circuit Breaker Surface Mount, 150A. Drop-in replacement for 185-series Circuit Breakers. Visible reset lever shows open condition. "Trip Free" - cannot be held closed after trip. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.