Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number P1E42MC250AT found under Panel Power Bus Circuit Breaker by Siemens Industry Inc. The National Stock Number assigned to this part is 6110016646355, and the Federal Supply Class is 6110 Electrical Control Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like P1E42MC250AT.