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Cylindrical 250A fast blow fuse with metal end caps

OEM Industries

OEM Industries CNN 250A 48V DC 125V AC fast blow fuse

SKU CH-H593-157VZ

A 250-amp fast-blow fuse rated for 48 V DC and 125 V AC circuit protection

  • TypeCircuit Protectors
  • Amps250
  • Fast blow action limits fault energy
  • Rated 250 amps for heavy loads
  • Dual DC 48 V and AC 125 V rating
  • CNN series circuit protector design
  • RQD-1 model for automotive use

CNN 250A fast-blow fuse

The OEM Industries CNN 250A is a fast-blow fuse rated at 250 amps for DC 48V and AC 125V circuits. It provides rapid over-current protection for automotive and industrial electrical systems. The component interrupts fault current quickly to safeguard wiring and connected equipment. It is suited for installers and maintenance teams specifying circuit protection in these voltage bands.

Fits DC 48V and AC 125V protection schemes

The fuse installs directly into compatible CNN series fuse blocks or holders rated for the same voltage and current. It requires no external control circuitry to operate. By clearing heavy overloads and short circuits in milliseconds, it frees downstream components from thermal stress. The single-element design simplifies coordination with upstream breakers.

Replaces worn or blown CNN 250A links

This new fuse restores the original protection level when an existing CNN 250A link has opened or shows signs of ageing. The upgrade is worth it whenever the original fuse has operated or when periodic inspection calls for preventive replacement. It is not for circuits that demand a slower time-current curve or a different voltage rating. Builders needing a higher interrupting rating must select a different series.

Highlights

  • Fast blow action limits fault energy
  • Rated 250 amps for heavy loads
  • Dual DC 48 V and AC 125 V rating
  • CNN series circuit protector design
  • RQD-1 model for automotive use

Specifications

SeriesCNN 250A
ModelCNN 250A
TypeCircuit Protectors
Amps250

Questions about this item

At what current does the 250 A fast-blow fuse open under sustained overload?

The fuse is rated to interrupt at 250 amps, so sustained current above that level will cause it to blow and protect the circuit.

How much heat does the CNN 250A fuse generate when carrying full load continuously?

At its 250 amp rating the fuse dissipates heat proportional to its internal resistance; normal operation at full load will warm the element but stays within design limits.

What voltage-rated holder or block is required to install this CNN 250A fuse?

The fuse is rated for 48 V DC and 125 V AC, so the holder or fuse block must be approved for at least those voltages and the 250 amp current rating.

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