Description
Reliable MIDI Fuse Protection for Dual Battery, Car Audio, and High-Current Auto Electrical Systems.
Product Overview
The OEX ACX6505 is a pack of 10 bolt-on MIDI fuses rated at 50A and 32V DC, designed for circuit protection in automotive, 4WD, caravan, and marine electrical applications. Manufactured from copper with a tin-plated finish for corrosion resistance, each fuse features a visible element window that allows quick visual inspection of fuse condition without removal a practical advantage in hard-to-access installations like battery boxes, underbonnet fuseholders, and enclosed wiring runs.
Compatible with MIDI fuse holders including the OEX ACX6514, the ACX6505 uses a 30mm centre-to-centre bolt mounting pattern and SF30 form factor. The pack of 10 suits workshop stock, fleet vehicle installations, and any build where multiple circuits require the same 50A protection rating. A single-pack variant is also available as ACX6505BL.
Key Specifications
- Fuse type: MIDI, bolt-on
- Current rating: 50A
- Voltage rating: 32V DC
- Type designation: SF30
- Conductor material: Copper, tin-plated
- Feature: Fuse element window (visible blow indicator)
- Mounting: Centre to centre 30mm
- Pack quantity: 10
- Length: 41mm
- Weight: 0.1 kg (per pack)
- Warranty: 1 year
- Single pack variant: ACX6505BL
Features & Benefits
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50A Circuit Protection — Provides reliable overcurrent protection for high-current circuits including dual battery feeds, amplifier power supplies, winch circuits, and auxiliary accessory wiring rated at or below 50A.
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Fuse Element Window — A transparent window built into the fuse body allows you to visually confirm whether the fuse element has blown without removing it from the holder — saving time during fault-finding in enclosed battery boxes, underbonnet fuse panels, and tight wiring runs.
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Copper Tin-Plated Construction — Tin plating over the copper element resists corrosion at the contact surfaces, maintaining low contact resistance and reliable performance in humid, coastal, and marine-adjacent environments over the life of the installation.
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32V DC Rated — Covers both 12V and 24V automotive systems with voltage headroom — suitable for all standard passenger, commercial, and heavy vehicle electrical systems.
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30mm Centre-to-Centre Bolt Mounting — Standard MIDI fuse mounting pitch ensures compatibility with a wide range of MIDI fuse holders, including the OEX ACX6514 and other SF30-format holders.
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SF30 Form Factor — An industry-standard MIDI fuse format, widely used across automotive, marine, and caravan electrical applications for consistent fitment and replacement sourcing.
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Pack of 10 — Ideal for workshop stock, multi-circuit installations, and fleet vehicle builds where consistent 50A protection across several circuits is required. Single-pack variant (ACX6505BL) also available for individual replacement needs.
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1-Year Warranty — Backed by OEX's standard warranty for added peace of mind on every installation.
Technical Specs
| Specification |
Detail |
| Brand |
OEX |
| Part Number |
ACX6505 |
| Fuse Type |
MIDI |
| Type Designation |
SF30 |
| Mounting |
Bolt-On |
| Current Rating |
50A |
| Voltage Rating |
32V DC |
| Conductor Material |
Copper, Tin-Plated |
| Fuse Element Window |
Yes (visual blow indicator) |
| Mount Centre to Centre |
30mm |
| Length |
41mm |
| Pack Quantity |
10 |
| Weight (per pack) |
0.1 kg |
| Warranty |
1 Year |
| Single Pack Variant |
ACX6505BL |
Compatible With / Goes Well With
Suitable applications:
- Dual battery system circuit protection
- Car audio amplifier power supply fusing
- Winch and high-draw accessory circuits
- Caravan and marine auxiliary power fusing
- Solar charge controller and battery charger circuit protection
- Fleet vehicle and commercial electrical installations
Pairs well with:
- OEX ACX6514 Single MIDI fuse holder (matching SF30 holder)
- OEX 6 B&S battery cable (ACX0902L black / ACX0903L red)
- OEX distribution blocks and busbars
- OEX amplifier wiring kits and Anderson plug assemblies
- ACX6505BL single-pack variant for individual replacement fuses
Weight
0.1 kg per pack of 10.
Frequently Asked Questions
What is a MIDI fuse and where is it commonly used?
A MIDI fuse is a bolt-on, medium-current fuse used in automotive, caravan, and marine electrical systems for circuit protection in applications such as dual battery setups, amplifier power feeds, and winch wiring. It is larger than a standard blade fuse and designed for sustained high-current loads.
What does the fuse element window do?
The element window is a transparent section in the fuse body that lets you visually inspect whether the fuse element has blown without removing the fuse from its holder — useful for quick fault diagnosis in hard-to-access locations such as battery boxes and enclosed fuse panels.
Is this fuse compatible with the OEX ACX6514 MIDI fuse holder?
Yes. The ACX6505 uses the SF30 form factor and 30mm centre-to-centre bolt mounting, which is compatible with the OEX ACX6514 single MIDI fuse holder and other SF30-format MIDI holders.
What is the difference between the ACX6505 and the ACX6505BL?
The ACX6505 is sold as a pack of 10 fuses, suited to workshop stock and multi-circuit builds. The ACX6505BL is the same fuse sold individually as a single unit, suited to replacement or single-circuit installations.
Is a 50A fuse the right rating for my application?
Fuse selection depends on your cable gauge and the continuous current draw of your circuit. A 50A fuse should be paired with cable rated to carry at least 50A continuously. If you are unsure of the correct rating for your installation, consult a qualified auto electrician before fitting.
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