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Cylindrical 500A fast blow fuse, silver metal ends, 51 A rating, DC48V AC125V

OEM Industries

OEM Industries CNN 500A 51 A DC48V AC125V fast blow fuse

SKU CH-ZYCE-CKBFE

A 51 A fast-blow fuse rated for 500 A at 48 V DC and 125 V AC circuit protection

  • Amperage51
  • Product typeCircuit Protectors
  • Fast-blow protection for 51 A circuits
  • Rated for 500 A interrupting capacity
  • Dual voltage rating 48 V DC and 125 V AC
  • OEM Industries CNN 500A series reliability
  • Compact circuit protector for automotive use

OEM Industries CNN 500A Fast-Blow Fuse

The OEM Industries CNN 500A is a fast-blow fuse rated at 51 amps for DC 48V and AC 125V circuits. It provides overcurrent protection for automotive and generator electrical systems. The component interrupts fault current quickly to safeguard wiring and connected equipment. Supplied new in OEM packaging.

Voltage and Current Compatibility Check

Verify that the circuit you are protecting operates at or below DC 48V or AC 125V before installation. Confirm the continuous load does not exceed the 51 amp rating of this device. Ensure the fuse holder or block accepts the CNN series form factor. Check that the fast-blow response matches the protection requirements of your specific application.

Replaces Blown CNN 500A Series Fuses

This fuse directly replaces a failed OEM Industries CNN 500A unit with identical voltage and amperage ratings. The upgrade is worth it when the original device has opened due to an overcurrent event and system integrity must be restored. It is not suitable for circuits requiring a higher interrupting capacity or a different time-current characteristic.

How it compares

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Price $59.99
Typical for this category: the median of 1,135 items is $54.99.

Specifications

Product
Product lineCNN 500A
Model nameCNN 500A
Product typeCircuit Protectors
Power
Amperage51

Questions about this item

What comes in the package and do I need any extra hardware to install the CNN 500A fuse?

The fuse is supplied as a single unit. Installation requires a compatible CNN-series fuse holder or block rated for the same voltage and current, which is sold separately.

The listing shows both 500 A and 51 A — which rating should I select for my circuit?

The 51 A figure is the continuous current rating; choose this fuse when your circuit normally draws up to 51 A and you need fast-blow protection at 48 V DC or 125 V AC.

How does the fast-blow characteristic protect my 48 V DC system in practice?

The fast-blow element opens quickly under overload, limiting let-through energy and preventing damage to downstream wiring and components on a 48 V DC supply.

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