Lifecycle and sourcing posture
For BOM planning, this part is sourced and quoted to order against an RFQ; availability and current pricing are confirmed at quote time through independent distribution.
Siemens 5SY4404-8CC11 MCB, 4A D-curve 4-pole, 400V 10kA for
MPN5SY4404-8CC11
Siemens 5SY4404-8CC11 miniature circuit breaker, 400 V 10kA, 4-pole, D-curve, 4 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 5SY4404-8CC11 used for?
It is a miniature circuit breaker rated 400 V, 10 kA, 4-pole, D-curve, 4 A, specified for railway applications — typically protecting DC auxiliary circuits and equipment in rolling stock or wayside installations.
Where can I buy 5SY4404-8CC11 and how is it quoted?
This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote.
What compliance documentation is available for 5SY4404-8CC11?
As a Siemens industrial MCB, it is typically supplied with CE declaration and may carry additional railway-specific certifications (EN 50155, EN 61373) depending on the variant. Specific documentation should be requested at quote time.
MPN
5SY4404-8CC11