Three-pole design switches all phases in a three-phase circuit. The TM240 release is a thermal-magnetic trip unit. Breaking capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — that covers most industrial service entrances and panelboard mains where fault current runs high.
At 55 °C it derates to 48 A, at 60 °C to 47 A, at 65 °C to 46 A, and at 70 °C to 45 A. The -25 °C floor matters for unheated outdoor cabinets in cold climates — the breaker will still trip within spec down to that point.
Auxiliaries and releases — what's built in
That means if control voltage drops, the breaker opens automatically. Two auxiliary switches HQ (high-quantity) are integrated — these give status feedback (open/closed/tripped) to a PLC or indicator lamp without needing an external contact block. No voltage trigger, no communication function, no phase failure detection, no ground fault monitoring. This is a straight thermal-magnetic breaker.
That's a standard SENTRON 3VA1 frame size — it fits the same mounting footprint as other 3VA1 breakers in the 50 A class. Mount inside a panel or enclosure; not for washdown areas.