The Siemens 5SU1153-6KV06 is a combined residual-current and miniature circuit breaker (RCBO) in a 1+N-pole format, integrating Type A earth-leakage detection with a B-curve overcurrent trip in one 70 mm wide module. The B-curve (3–5 × In) magnetic trip at 6 A rated current ensures fast disconnection for resistive and lightly inductive loads, including control transformers and solenoid valves common in furnace gas-train safety circuits.
Deployment context — panel integration
The screw-clamp terminals accept 1.5–25 mm² conductors, and the device snaps onto a 35 mm DIN rail per EN 60715. For a furnace control panel, this RCBO typically protects a single-phase control transformer or a burner-management controller, where the 10 mA residual trip provides additional personnel protection beyond the upstream 30 mA RCD.