Breaking capacity and selectivity headroom
The 5SU1656-0KK13 carries a rated short-circuit capacity of 6 kA per EN 60898 and 15 kA per IEC 60947-2. The EN 60898 value governs its use in domestic-type installations; the IEC 60947-2 value applies when the device is specified into industrial switchgear assemblies. The 15 kA figure gives useful headroom for high-fault locations without requiring an upstream current-limiting device. Energy limitation class 3 means it limits let-through energy to a low level, aiding downstream coordination.
Temperature derating — real-world current capacity
The 13 A rating is at 30 °C ambient. At 40 °C the continuous current drops to 12.48 A, at 50 °C to 11.96 A, at 60 °C to 11.31 A, and at 70 °C to 10.01 A. If the RCBO is mounted in a warm enclosure or adjacent to heat-generating devices, use the derated value for the actual ambient temperature. The device is rated for any mounting position, so orientation does not affect thermal performance.
Mounting and panel integration
The 5SU1656-0KK13 occupies 2 modular width units (36 mm) on a DIN rail. Installation depth is 70 mm, overall depth 77 mm. The supply cord can enter from either top or bottom, which simplifies wiring in tight enclosures. Protection class is IP20 once installed in a distribution board with connected conductors — the IP20 rating applies to the front face only; the rear and terminals rely on the enclosure for protection against dust and moisture.