The Siemens 5SY4140-6CC11 is a 1-pole miniature circuit breaker rated 40 A with a B-trip curve, breaking capacity of 10 kA at 230/400 V, and designated for railway applications. The B-curve means it trips between 3 and 5 times rated current — suited for resistive and general-purpose loads where inrush is moderate, not for high-surge motor circuits. The 10 kA interrupting rating at 400 V is the fault current it can safely clear without welding contacts or cascading damage upstream in the distribution panel.
Siemens 5SY4140-6CC11 MCB, 1-pole B 40A, 10kA, railway
MPN5SY4140-6CC11
Siemens 5SY4140-6CC11, miniature circuit breaker, 230/400 V 10 kA, 1-pole, B, 40 A, for railway applications.
Source DocumentedChannel stated on listing & quote
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Product details
Frequently asked questions
What is 5SY4140-6CC11's breaking capacity and voltage rating?
It is rated 10 kA at 230/400 V, 1-pole, B-curve, 40 A, and designated for railway applications.
Where can I buy 5SY4140-6CC11?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
5SY4140-6CC11