40A AMI / MIDI High-Current Bolt-Down Fuse

Dependable 40 Amp Circuit Protection for DC-DC Chargers & Auxiliary Circuits

Engineered to protect low-to-medium draw DC electrical circuits against overloads and short circuits, the 40A AMI / MIDI Bolt-Down Fuse provides space-saving, heavy-duty circuit protection. Perfectly rated for 15A–20A DC-DC battery chargers, 200W inverters, air compressors, and auxiliary distribution sub-lines, this 40 Amp fuse handles continuous loads while preventing false trips.

Constructed with tin-plated copper alloy contact blades, it maintains high conductivity with minimal voltage drop. The M5 bolt-down eyelet design guarantees a rock-solid, vibration-resistant connection that will not loosen, arc, or overheat under demanding 4WD, caravan, camper trailer, and marine operating conditions.

Key Features

• 40 Amp Continuous Protection: Ideal rating for protecting 15A/20A DC-DC battery chargers, portable air compressors, and secondary accessory sub-feeds.

• Slow-Blow Time-Delay Element: Engineered to tolerate brief startup current spikes (inrush current) without false blowing when initiating loads.

• Vibration-Proof M5 Bolt-Down Mounting: Secures firmly onto M5 studs to eliminate loose contacts and resistive heat buildup caused by rough off-road terrain or engine vibration.

• Corrosion-Resistant Terminals: Tin-plated copper blades deliver superior conductivity and long-term protection against oxidation and humidity.

• Clear Visual Inspection: Stamped 40A rating and transparent housing window allow for instant visual diagnostic checks inside fuse holders.

Technical Specifications

Applications

• 15A and 20A DC-DC battery chargers and solar regulators

• High-draw 12V air compressors and fridge power lines

• Auxiliary 12V/24V power distribution sub-panels and fuse blocks

• Caravan, 4WD, camper trailer, and marine power systems