Railway-rated MCB, D-curve, 20 A
The Siemens 5SY4420-8CC11 is a 4-pole miniature circuit breaker rated 400 V with a 10 kA interrupting capacity, D-curve trip characteristic, 20 A rated current, and designated for railway applications.
Siemens 5SY4420-8CC11 MCB 400V 10kA 4P D 20A Railway
MPN5SY4420-8CC11
Siemens 5SY4420-8CC11, miniature circuit breaker, 400 V 10kA, 4-pole, D-curve, 20 A, for railway applications.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Product details
Frequently asked questions
What is the 5SY4420-8CC11's rated breaking capacity?
It is rated 10 kA at 400 V, which is the standard interrupting rating for this railway-grade MCB.
MPN
5SY4420-8CC11