Interrupting ratings and thermal derating
This MCCB delivers 53 kA interrupting capacity at 240 V AC, 32 kA at 415 V, 14 kA at 440 V, and 8 kA at 500 V — the numbers drop as system voltage rises, which is typical for a thermal-magnetic breaker with no current-limiting arc chamber. Thermal performance is flat from 40 °C to 55 °C at 16 A per pole, then derates to 15 A at 60 °C, 14 A at 65 °C, and holds 14 A at 70 °C. The maximum power loss is 11 W per pole, so heat buildup in a multi-breaker lineup is manageable but not negligible.
Dimensions, mounting, and environment
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling.