The Siemens 3VA1150-4ED42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker with a breaking capacity class S rated at 36 kA at 415 V. It carries a fixed 50 A overload setting (Ir = 50 A) and a fixed short-circuit release set at 10 x In. The TM210 thermal-magnetic trip unit provides line protection; the FTFM (Fixed Thermal Fixed Magnetic) design means no field-adjustable trip curves — what you order is what protects the circuit.
What the ratings mean for fit
The 36 kA Icu at 415 V places this breaker in breaking capacity class S — it can safely interrupt fault currents up to that level without upstream fuses or a current-limiting reactor. The fixed 50 A Ir and 500 A Ii (10 x In) suit it for dedicated feeder or branch circuits where the load is known and won't change. The N conductor is unprotected, so this breaker is intended for 3-phase + N systems where the neutral is not expected to carry fault current — typical in IEC distribution panels.