The Schneider Electric Domae DOMF01320 is a 3-pole miniature circuit breaker rated 20 A with a C trip curve and 6000 A breaking capacity (Icn) per IEC 60898-1. The thermal-magnetic trip unit handles overloads and short-circuits; the C curve (5–10 x In magnetic trip) suits inductive loads like small motors and lighting banks where inrush is moderate.
Mounts via clip-on onto standard DIN rail. At 54 mm wide, it occupies three modular spaces in the distribution board. The tunnel terminals accept 1–25 mm² rigid or 1–16 mm² flexible cable; strip 14 mm and torque to 2 N.m. IP20 on the body, IP40 inside the modular enclosure.
Electrical durability is 10,000 cycles, mechanical 20,000 cycles; that's typical for a residential-grade MCB and adequate for most branch-circuit switching duties. CE marked, conforms to IEC 60898-1. Storage temperature range -40 to 85 °C; operating range -5 to 60 °C with 95% relative humidity at 55 °C (tropicalisation class 2 per IEC 60068-1).