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Small cylindrical fuse with silver end caps and a white ceramic body

Littelfuse

Littelfuse KLKR01.5 Fuse 1.5A 600VAC 300VDC

SKU CH-6NXR-Z5340

A fast-acting UL Class CC fuse rated 1.5 A at 600 V AC and 300 V DC with a 200 kA interrupt rating

  • TypeFuses & Accessories
  • Fast-acting protection clears faults quickly
  • 5 A rating matches low-current circuits
  • 600 V AC and 300 V DC voltage ratings cover industrial supplies
  • 200 kA interrupt rating at 600 V AC handles high fault energy
  • UL listed, CSA certified, CE marked and RoHS compliant for code compliance

KLKR Series Fast-Acting Fuse

The Littelfuse KLKR01.5 is a UL Class CC cylindrical fuse rated at 1.5 amperes for 600 volts AC and 300 volts DC. It provides fast-acting overcurrent protection for control circuits, lighting ballasts and general-purpose industrial equipment. The rejection-style body prevents installation in non-rejection fuse blocks, ensuring correct coordination.

Thermal and Electrical Behaviour

The melamine body and dual-element construction limit temperature rise during normal load while delivering a 200 kiloampere interrupt rating at 600 volts AC and 20 kiloampere at 300 volts DC. Fast-acting response clears short-circuit faults quickly, reducing thermal stress on downstream components. Operation is silent with no moving parts and negligible standby power draw.

Build Integration

The fuse measures 1-1/2 inches in length and 13/32 inches in diameter, fitting standard Class CC fuse blocks such as the L600C series. It carries CE, CSA and RoHS markings and complies with UL 248-4, allowing direct substitution for Bussmann KTK-R and Mersen ATMR equivalents. Not suited for applications requiring visual indication or higher continuous current ratings.

Highlights

  • Fast-acting protection clears faults quickly
  • 5 A rating matches low-current circuits
  • 600 V AC and 300 V DC voltage ratings cover industrial supplies
  • 200 kA interrupt rating at 600 V AC handles high fault energy
  • UL listed, CSA certified, CE marked and RoHS compliant for code compliance

Specifications

BrandLITTELFUSE
TypeFuses & Accessories

Questions about this item

How do I install the KLKR01.5 fuse in a Class CC fuse block and what step is commonly missed?

Insert the cylindrical fuse into an L600C series block; the rejection feature prevents wrong amp ratings, so verify the 1.5 A marking matches the circuit before closing the cover.

What maintenance or replacement will the KLKR01.5 fuse need after it operates?

This fast acting fuse is nonindicating and single use; once it interrupts a fault at 200 kA AC or 20 kA DC it must be replaced with an identical 1.5 A KLKR series fuse.

What is the first limit reached under sustained overload on the KLKR01.5 fuse?

The 1.5 ampere rating is the continuous current limit; exceeding it causes the element to melt and open the circuit at the 200 kA AC interrupt rating.

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