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
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40 Amp Continuous Protection: Ideal rating for protecting 15A/20A DC-DC battery chargers, portable air compressors, and secondary accessory sub-feeds.
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Slow-Blow Time-Delay Element: Engineered to tolerate brief startup current spikes (inrush current) without false blowing when initiating loads.
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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.
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Corrosion-Resistant Terminals: Tin-plated copper blades deliver superior conductivity and long-term protection against oxidation and humidity.
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Clear Visual Inspection: Stamped 40A rating and transparent housing window allow for instant visual diagnostic checks inside fuse holders.
Technical Specifications
| Specification |
Details |
| Product Type |
AMI / MIDI Bolt-Down Fuse |
| Amperage Rating |
40 Amp (40A) |
| Voltage Rating |
Up to 32V DC (Supports 12V / 24V systems) |
| Interrupt Rating |
5,000A @ 16V DC / 2,000A @ 32V DC |
| Mounting Style |
M5 Stud / Bolt-Down (~30mm hole spacing) |
| Terminal Material |
Tin-Plated Copper Alloy |
| Body Material |
High-Temperature Thermoplastic |
| Operating Temp |
-40°C to +125°C |
Applications
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15A and 20A DC-DC battery chargers and solar regulators
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High-draw 12V air compressors and fridge power lines
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Auxiliary 12V/24V power distribution sub-panels and fuse blocks
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Caravan, 4WD, camper trailer, and marine power systems
We appreciate your business and are committed to providing exceptional service and timely delivery. Please review the shipping information below before placing your order.
Is It In Stock?
Over 98% of the products listed on our website are in stock.
If a part is not currently in stock, we will notify you as soon as we process your order. We process all orders on the same business day they are received.
If you would like to confirm availability before placing your order, please contact us.
Packaging
Rest assured that all items will be securely packaged to minimise the risk of damage during transit. Fragile or high-value parts may be packaged with additional protective materials such as bubble wrap, foam padding, or reinforced cartons.
Where Do You Ship From?
All parts are stocked and shipped from our location at The Boat Works Marina on the Gold Coast, Australia.
Shipping Rates
Shipping rates vary based on the size, weight, and destination of the package. Estimated shipping costs are displayed during checkout before your order is placed.
Free Shipping – Australia
We offer Free Shipping on parts orders over $55 within Australia.
If you select Free Freight, your order will generally be sent using Australia Post Standard or another standard delivery service.
Australia Post standard delivery is typically 4–10 business days within Australia.
If delivery time is important, we recommend selecting one of our paid express freight services.
Please note:
- Certain items do not qualify for Free Freight. Please refer to the product description for details.
- Dangerous goods, oils, lubricants, DeFOUL, Propspeed products, batteries, and certain oversized items may be excluded from Free Freight and may require road freight services.
Order Tracking
Once your order has been dispatched, you will receive an email containing your tracking number and carrier information.
Who Do You Ship With?
We ship using:
- Australia Post
- StarTrack
- Team Global Express
- UPS
- DHL Express
- FedEx
- TNT
- Couriers Please
- Freight forwarding and brokerage services such as Transdirect
We have extensive experience shipping throughout Australia and worldwide. We will select the carrier we believe is most suitable for your location and the type of goods being shipped.
If you would prefer to use your own carrier account or would like to discuss shipping options, please contact us.
International Orders
We ship worldwide.
International orders may be subject to import duties, taxes, VAT/GST, customs clearance fees, brokerage charges, and other fees imposed by the destination country.
These charges are not included in the product price or shipping cost displayed at checkout and are the responsibility of the recipient.
Customs regulations vary by country. In some cases, customs authorities may require additional information such as a passport number, national identification number, tax identification number, or business registration number before a shipment can be cleared for delivery.
If you are unsure what charges may apply in your country, we recommend contacting your local customs office before placing an order.
