The Siemens 3VA1463-5EF32-0LH0 is a 3-pole IEC frame 630 molded-case circuit breaker rated for line protection with a TM240 thermal-magnetic trip unit. Its 55 kA breaking capacity at 415 V (class M) means it can safely interrupt fault currents up to that level without upstream cascading — a key figure for panel builders coordinating selectivity in a 400 V distribution board.
Ratings and what they mean for fit
The overload protection range Ir = 440…630 A is set via a dial on the trip unit; the short-circuit pickup Ii is adjustable from 4 to 8 times In (2520…5040 A). This gives the site electrical engineer flexibility to match the breaker to the actual cable and load without swapping trip packs. The 24 V DC universal release accessory powers a shunt trip or undervoltage release — common in remote-trip or safety-circuit applications where a control signal must open the breaker independently of the thermal-magnetic mechanism.
Integration notes
The breaker mounts on a standard DIN rail or can be screw-fixed to a backplate. The 24 V DC release and the two auxiliary changeover switches (1 NO + 1 NC each) plug into the accessory slots on the left side of the mechanism — verify polarity on the release coil before energizing. The TM240 trip unit is field-adjustable, so no separate rating plug is needed.