It's built for distribution duty per EN/IEC 60947-2, with a toggle control and front-front connection that suits panelboard and switchboard layouts.
Rated 100 kA Icu at 220/240 V AC, 70 kA at 380/415 V, 65 kA at 440 V, 50 kA at 500 V, 35 kA at 525 V, and 10 kA at 660/690 V — all per IEC 60947-2. Under UL 60947-4-1 it carries 85 kA at 240 V, 65 kA at 480 V, 10 kA at 600 V AC. The H breaking capacity code (70 kA at 415 V) tells you this is the high-interrupting version of the NSX100 frame. For a 480 V distribution panel with a 65 kA available fault current, this breaker lands with headroom. At 690 V the 10 kA limit means it's not for high-fault industrial 690 V mains — coordinate upstream.
The ComPacT NSX line is Schneider's active MCCB platform, so the C10H4TM063 is a standard catalog item. For BOM-freeze or line-down situations, this is a fast-moving spare that keeps on the shelf.
Connection pitch is 35 mm per pole. IP40 enclosure protection (IK07 impact) means it's fine for indoor switchboards but not washdown zones.
Durability and electrical life
Mechanical durability is 50,000 cycles. Electrical durability varies by load: 50,000 cycles at 440 V at half rated current, 30,000 at full 440 V In, 20,000 at 690 V at half In, and 10,000 at full 690 V In. For a distribution breaker seeing infrequent switching, that's well beyond typical panel life. The TM-D trip unit is field-replaceable; the breaker accepts up to 5 accessory slots for shunt trips, aux contacts, or under-voltage releases.