The Siemens 3VA1163-5EF32-0AA0-ZD00 is a 3-pole IEC frame 160 molded-case circuit breaker rated for line protection. Its breaking capacity class M delivers Icu=55kA at 415 V — enough to handle high-fault utility feeds without cascading upstream. The TM240 thermal-magnetic trip unit gives adjustable overload protection (Ir=44 A…63 A) and fixed short-circuit pickup (Ii=5…10 x In). This variant includes a nut keeper kit and is configured for a DC Power OEM in China.
What the ratings mean for fit
The 55 kA interrupting capacity at 415 V means this breaker can clear a bolted fault on a 2 MVA transformer secondary without rupturing — critical for main or sub-feed positions where SCCR requirements exceed 25 kA. The TM240 trip unit's adjustable Ir band (44–63 A) lets you match the breaker to a 50 A or 63 A continuous load without changing the frame. Short-circuit pickup at 5–10 x In (315–630 A at the In=63 A setting) suits motor-starting inrush or transformer magnetizing currents that would nuisance-trip a lower Ii setting.
Integration notes
Mounts on a DIN rail or panel-mount via the frame's integral lugs. The nut keeper kit is intended for the DC Power OEM variant — verify lug torque specs against the terminal marking before torquing. The 3-pole footprint fits standard 3VA1 switchboard cutouts; leave at least 50 mm free above and below for arc-chamber venting.