The 200 A rating at 40 °C sets the continuous current capacity — sized for a main feeder or large subfeed on a 200 A bus. The TM-D thermal-magnetic trip unit combines overload protection (thermal element) with short-circuit protection (magnetic element); the earth-leakage protection adds a ground-fault trip, so it covers the three protection types listed in a single device. The breaking capacity is the key fault-handling number: 20 kA Icu at 440 V AC means it can safely interrupt a fault current up to 20,000 A at that voltage without failing — sufficient for most secondary distribution panels where the available fault current is under 20 kA. At 380–415 V the rating rises to 25 kA, and at 220–240 V to 85 kA, giving headroom on lower-voltage systems. The 440 V rated operational voltage and insulation voltage match standard 400 V class networks.
Fixed mounting on a backplate — no DIN-rail adapter, so plan for bolt-down installation in the enclosure. Dimensions: 165 mm height, 140 mm width, 68 mm depth. IP20 finger-safe protection and IK07 impact resistance suit panel-mount indoor use; pollution degree 3 means it tolerates conductive pollution (condensation, light dust) typical in industrial switchgear. The toggle control provides local on/off and trip indication with positive contact indication — the handle position shows contact state even without power.
Also compliant with JIS C8201-2-2 and GB/T 14048.2, so it carries acceptance in Japanese and Chinese markets. Category A indicates no intentional short-time delay; it trips instantaneously on fault, coordinating with downstream devices in a selective scheme only if their let-through energy is lower.