Description
OEX ACX6528BL 300A Bolt On Mega Fuse SF51 Type Copper Tin Plated Single Unit
The OEX ACX6528BL is a single-unit 300A bolt-on mega fuse of SF51 type, rated to 32V DC with copper tin plated contacts and a 50.8mm centre-to-centre mounting distance. Covered by a one-year warranty. Also available in a pack of 5 as the ACX6528.
Product overview
The ACX6528BL is the single-unit version of the ACX6528 and carries the same specification the top-rated fuse in the OEX SF51 mega range at 300A. It suits the most demanding main circuit protection applications in 12V and 24V electrical systems, including main battery-to-busbar feeds on high-capacity dual battery setups, large commercial vehicle power distribution, heavy-duty winch systems and multi-amplifier audio installations with substantial total current draw.
The bolt-on SF51 format provides a secure, vibration-resistant connection required for sustained operation at high current levels. Copper tin plated contacts maintain reliable conductivity and oxidation resistance across the service life of the fuse. Buyers needing multiple units for a workshop or trade context may find the ACX6528 5-pack more economical.
Features and benefits
300A rated mega fuse: Top-rated fuse in the OEX SF51 mega range at 300A, suited to main battery feeds, high-capacity busbar distribution, heavy-duty winch systems and large commercial electrical installations.
Bolt-on SF51 type: Bolt-on connection provides a secure, vibration-resistant installation suited to sustained high-current loads where connection integrity under load is essential.
Copper tin plated contacts: Tin-plated copper contacts provide reliable conductivity and resist oxidation over time, maintaining consistent fuse performance.
32V DC rating: Compatible with both 12V and 24V DC vehicle electrical systems within the 32V rating.
50.8mm centre-to-centre mounting: Standard SF51 bolt spacing compatible with a wide range of mega fuse holders.
Single unit: Sold individually, suited to single-fuse replacement or one-off installation requirements.
One year warranty: Covered by a one-year OEX warranty.
Technical specs
| Specification |
Detail |
| SKU |
ACX6528BL |
| Brand |
OEX |
| Fuse Type |
Mega (SF51) |
| Amperage |
300A |
| Voltage Rating |
32V DC |
| Contact Material |
Copper tin plated |
| Length |
68mm |
| Mount Centre to Centre |
50.8mm |
| Weight |
0.02kg |
| Pack Quantity |
1 |
| Warranty |
One year |
| Sold As |
Single unit |
Frequently asked questions
What is the difference between the ACX6528BL and the ACX6528? The ACX6528BL and ACX6528 are the same 300A SF51 mega fuse. The ACX6528BL is sold as a single unit while the ACX6528 is supplied in a pack of 5. Choose the 5-pack for workshop or trade use where having spare fuses on hand is practical.
How does the ACX6528BL compare to other OEX mega fuses in this range? The OEX SF51 mega fuse range includes the ACX6519 (60A), ACX6520 (80A), ACX6522 (125A), ACX6523 (150A), ACX6527 (250A) and ACX6528BL/ACX6528 (300A). All share the same SF51 format and 50.8mm mount spacing. The 300A is the highest-rated option in the range.
What fuse holder is compatible with the ACX6528BL? The ACX6528BL uses a standard SF51 mega fuse format with 50.8mm centre-to-centre bolt spacing, compatible with mega fuse holders designed for this spacing. Contact us if you need help selecting a compatible OEX fuse holder.
Can the ACX6528BL be used in a 24V system? Yes. The ACX6528BL is rated to 32V DC, covering both 12V and 24V vehicle electrical systems.
Is the 300A rating suitable for my application? 300A suits the most demanding main circuit protection applications including high-capacity battery-to-busbar feeds, heavy-duty winch systems and large commercial power distribution setups. If you are unsure whether 300A is the correct rating for your circuit, contact us for advice before purchasing.
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