MCCB for distribution panels — 20 A, 3-pole, line protection
It carries 121 kA breaking capacity at 240 V and 75.6 kA at 415 V, so it handles high-fault utility feeds in distribution switchboards without cascading upstream.
The 20 A rating holds flat from 40 °C through 50 °C; above that it derates linearly to 18 A at 70 °C. That matters for a panel near a furnace line or in a hot electrical room — at 55 °C you lose 0.8 A, at 60 °C you lose 1.2 A, at 65 °C you lose 1.6 A.
Mechanical fit and panel integration
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that drops into most DIN-rail or panel-mount distribution boards without re-drilling. The 15 000-cycle mechanical endurance is typical for a fixed-mount MCCB in a distribution role; it is not a switching device for frequent motor starts.