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Cylindrical 40 amp fuse with metal end caps

OEM Industries

OEM Industries CNN 40A 40A DC48V/AC125V RQD-1 line protection

SKU CH-PWQ1-JGB6Z

A 40 amp fast-blow fuse rated for DC 48 V and AC 125 V circuit protection

  • Amperage40
  • Product typeCircuit Protectors
  • 40 A fast-blow protection stops overloads instantly
  • Rated for 48 V DC and 125 V AC systems
  • Compact CNN series fits tight automotive fuse blocks
  • Reliable single-use design breaks circuit on fault
  • OEM Industries quality for generator and vehicle wiring

OEM Industries CNN 40A Circuit Protector

The OEM Industries CNN 40A is a circuit protector rated at 40 amps for DC 48V and AC 125V systems. It functions as a fast blow fuse designed for automotive electrical circuits. This component provides overcurrent protection for vehicle wiring and accessories.

Suits 40 amp automotive circuits only

This fuse suits vehicles and equipment requiring a 40 amp DC 48V or AC 125V fast blow link. It is not for buyers who need a higher amperage rating or a different voltage specification. Builders looking for slow blow characteristics or alternative form factors should look at something else.

Simple two terminal installation

Installation involves placing the fuse into a compatible CNN series holder or block. What usually goes wrong is selecting a holder with the wrong voltage or amp rating for the 40A link. Using an incorrect fuse rating leaves the circuit unprotected or causes nuisance blowing.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $48.99
Cheaper than about 56% of the 1,135 comparable items (median $54.99).

Specifications

Product
Product lineCNN 40A
Model nameCNN 40A
Product typeCircuit Protectors
Power
Amperage40

Questions about this item

What voltage rating must my vehicle's electrical system match for this CNN 40A fuse to protect the circuit correctly?

The fuse is rated for DC 48 V and AC 125 V, so your system voltage must not exceed those limits for proper operation.

Will this fast-blow CNN 40A fuse coordinate with an older 40 A slow-blow breaker already in the panel?

Because this fuse uses a fast-blow RQD-1 characteristic, it will open more quickly than a slow-blow device, so the older breaker may not trip first during a short circuit.

How can I confirm the CNN 40A fuse has interrupted a fault after installation?

After a suspected over-current event, remove the fuse and check for a visible break in the element or test continuity with a multimeter; an open circuit indicates it has operated as intended.

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