It protects branch circuits in control panels, distribution boards, and railway auxiliary systems against overload and short-circuit faults. Breaking capacity is 10 kA per EN 60898 and 35 kA per IEC 60947-2 at 400 V AC — the higher IEC figure governs industrial panel coordination where fault current may exceed the domestic standard. For DC circuits the maximum rated voltage is 72 V, with a 15 kA breaking capacity under IEC 60947-2. It avoids nuisance tripping on inrush while clearing hard faults.
Siemens 5SY4304-7KK11 SENTRON MCB, 3P 4A C-Curve, 10kA/35kA
MPN5SY4304-7KK11
Siemens SENTRON 5SY4304-7KK11, 3-pole miniature circuit breaker, 4 A rated current, C tripping characteristic, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity, 400 V AC, 72 V DC max, sealed terminals, IP20.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Width | 54 mm |
| Height | 90 mm |
| Depth | 76 mm |
Product details
Frequently asked questions
Will 5SY4304-7KK11 drop into a panel specified around 5SY3132-6 without rewiring?
Both are 3-pole SENTRON MCBs on the same DIN-rail footprint (3 width units, 54 mm). The 5SY4304-7KK11 is a 4 A C-curve; the 5SY3132-6 is a different rating and trip characteristic. Mechanical fit is the same, but verify the electrical ratings match your circuit before substituting.
What is 5SY4304-7KK11's listed depth?
Depth is 76 mm (installation depth 70 mm).
What wire sizes does the 5SY4304-7KK11 accept?
Solid and stranded conductors from 0.75 mm² up to 35 mm².
MPN
5SY4304-7KK11