Siemens 5SY4104-8CV, MCB, Icu=15kA 230/400V, 1-pole, D4 characteristic.
The Siemens 5SY4104-8CV is a 1-pole miniature circuit breaker rated for 15 kA interrupting capacity at 230/400 V AC, with a D4 tripping characteristic. The 15 kA Icu at 400 V gives headroom for high-fault panels where standard 6 kA or 10 kA breakers would need upstream fusing or a larger frame.
The 5SY4104-8CV has a rated ultimate breaking capacity (Icu) of 15 kA at 230/400 V AC, single-pole. That 15 kA rating means it can safely interrupt fault currents up to that level without cascading upstream — suitable for high-fault-capacity panels.
This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time, not from a shelf count.
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