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Cylindrical 700A fast-blow fuse, silver metal ends

OEM Industries

OEM Industries CNN 700A 700A DC48V AC125V line protection

SKU CH-GM1X-J4ATG

A 700 A fast-blow fuse rated for 48 V DC and 125 V AC circuit protection

  • TypeCircuit Protectors
  • Amps700
  • Handles high-current loads up to 700 A
  • Protects 48 V DC and 125 V AC circuits
  • Fast-blow RQD-1 design limits fault energy
  • CNN-series construction fits automotive generator systems
  • New condition ensures full factory performance

OEM Industries CNN 700A Circuit Protector

This 700-amp circuit protector is built for high-current DC and AC circuits in automotive and industrial electrical systems. It serves installers and maintenance teams who need reliable over-current protection for heavy-duty wiring and equipment. The unit is rated for 48 volts DC and 125 volts AC, covering common vehicle and auxiliary power architectures. Its fast-blow characteristic reacts quickly to fault conditions to limit damage.

Thermals, Noise and Power Draw

As a passive fuse element, the device generates no audible noise and requires no cooling airflow during normal operation. Heat is produced only when current flows, and the component is designed to carry the full 700-amp rating without nuisance tripping. Power dissipation stays within the limits defined by the CNN series construction for the rated voltage levels. There are no moving parts, fans or active circuitry to monitor.

Upgrade Context

This fuse replaces a blown or ageing CNN 700A link in existing holder blocks rated for the same voltage and amperage. The swap is worthwhile when the original element has opened after a fault or when periodic inspection shows discoloration or deformation. It does not add protection to a circuit that previously lacked a fuse, nor does it increase the current capacity beyond the 700-amp rating of the holder and wiring.

Highlights

  • Handles high-current loads up to 700 A
  • Protects 48 V DC and 125 V AC circuits
  • Fast-blow RQD-1 design limits fault energy
  • CNN-series construction fits automotive generator systems
  • New condition ensures full factory performance

Specifications

SeriesCNN 700A
ModelCNN 700A
TypeCircuit Protectors
Amps700

Questions about this item

How is the CNN 700A fuse installed in a DC 48 V or AC 125 V circuit, and what step is often missed?

Insert the fuse into a compatible holder rated for 700 A, ensuring the holder and wiring are sized for the full current; the step often missed is verifying the holder’s voltage rating matches the circuit’s 48 V DC or 125 V AC requirement.

What maintenance or replacement will the CNN 700A fuse need after it operates?

The fuse is a single-use fast-blow device; once it interrupts a fault at 700 A it must be replaced with an identical CNN 700A unit, as it cannot be reset or reused.

What limit appears first when the CNN 700A fuse runs continuously at high current?

The 700 A ampere rating is the primary limit; sustained current at or above this value will cause the element to melt and open the circuit, ending its service life.

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