Terelec power distribution products include DC miniature circuit breakers for solar PV, battery storage and electric vehicle charging infrastructure — one of the fastest-growing segments in UK electrical installation. Our DC MCB range (DGB3-80DC) is available from 1-pole 300V DC through to 4-pole 1200V DC, covering the full range of DC voltage requirements in domestic and commercial renewable energy systems.

DC MCBs are fundamentally different from standard AC MCBs and must not be substituted for each other. DC circuit breakers are designed to interrupt direct current — which does not have the natural zero-crossing of AC current and is therefore significantly harder to break safely. Our DC MCB range is tested and rated specifically for DC voltages from 300V to 1200V DC. Browse by voltage and pole count using the subcategories below.