Description

The HMB399 is a 3-pole, 125A MCB with a B-type tripping curve and 15kA breaking capacity — the highest-rated device in the 3-pole HMB range. It is designed for protecting main incomer circuits and large sub-main three-phase feeders in commercial and industrial distribution systems.
The 125A rating per pole makes it appropriate for protection of distribution boards serving major electrical loads such as HVAC systems, large motor groups, or industrial process equipment. It occupies 4.5 DIN rail modules and accepts conductors up to 70mm² rigid.
Compatible with HMB series auxiliary accessories, the HMB399 is IP20 rated, RoHS compliant, and designed for an operating temperature range of -25°C to +70°C.