It is a 3-pole unit fitted with a TM240 thermal-magnetic trip unit, rated In=630 A, with overload protection adjustable Ir=440…630 A and short-circuit protection Ii=4…8 x In. The breaker ships with two auxiliary switch changeover contacts and one trip alarm switch changeover contact, plus a nut keeper kit for secure panel mounting.
The TM240 trip unit is thermal-magnetic with a fixed thermal curve (240 A frame) and adjustable magnetic pickup; the Ir range of 440 to 630 A lets you match the continuous load of a transformer or a heavy motor feeder, while the Ii setting of 4 to 8 times In (2,520 to 5,040 A) allows coordination with downstream breakers.
Deployment context
This breaker mounts in a standard panel cutout or on a DIN rail adapter (not included). At 630 A frame size, it requires careful thermal management in the enclosure — the TM240 trip unit dissipates heat proportional to load current, so maintain the manufacturer's recommended clearance for natural convection. The nut keeper kit secures the breaker to the mounting plate, preventing loosening under vibration in industrial environments.