Magnum fuse block assemblies deliver code-compliant over-current protection for high-current battery, inverter, and charging cable circuits. Each unit combines a rugged polycarbonate base with a thermoformed ABS cover, creating a compact and durable package suitable for RV cabins, battery boxes, or equipment compartments.

Fast-acting, current-limiting Class-T fuse cartridges provide instantaneous protection during short circuits, while the inherent time delay accommodates normal inverter surge currents without nuisance operation. The 300 and 400 ampere models use Class-T fuses; smaller capacities employ ANL-type cartridges.

• Power rating: 400 amperes
• Fuse type: Class-T, slow-blow cartridges
• Fuses included: Yes
• Base material: Injected moulded polycarbonate
• Cover material: Thermoformed ABS plastic
• Ideal for inverters, chargers, and battery protection
• Compact, cost-effective over-current solution