It carries the device short name NSX100HB2 and is designed for distribution applications per EN/IEC 60947-2.
The 63 A trip unit rating at 40 °C sets the continuous current limit for a panel feed or downstream bus; above that temperature, derating applies. The 100 kA Icu at 690 V AC means this breaker can safely interrupt fault currents up to 100 kA without welding or rupturing — critical for high-fault installations like large motor control centers or transformer secondaries where available fault current exceeds typical 25–50 kA gear. The TM-D trip unit provides overload protection (thermal element) and short-circuit protection (magnetic element), with the neutral protection set at 1 x Ir (4D). This is a standard thermal-magnetic curve for distribution feeders — no electronic adjustments, so coordination studies rely on the fixed trip thresholds. The IP40 enclosure protection keeps out tools and small wires but not water — mount inside a panel, not exposed to washdown. Mechanical durability is 20,000 cycles, and electrical durability ranges from 20,000 cycles at 440 V In/2 down to 5,000 cycles at 690 V In.
The 140 mm width, 161 mm height, and 86 mm depth fit standard ComPacT NSX panel cutouts. The neutral position is left, and the connection pitch is 35 mm. Five accessory slots are available for auxiliary contacts, shunt trips, or under-voltage releases — plan slot allocation before wiring.
This simplifies panel design and reduces component count.