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Small cylindrical glass fuse with metal end caps

Fluke

Fluke 203411 440mA 1000V Fast-Acting Multimeter Fuse

SKU CH-F5FS-K6VKS

A 440 mA fast-acting fuse rated for 1000 V AC and DC with a 10 kA interrupt rating

  • 440 mA rating protects sensitive multimeter circuits
  • Fast-acting design interrupts faults in milliseconds
  • 1000 V AC and DC voltage rating covers high-energy measurements
  • 10 kA interrupt capacity at 1000 V AC handles severe short-circuits
  • CE, RoHS and UL Recognised compliance meets international safety standards

Replacement Fuse for Fluke DMM

The Fluke 203411 is a fast-acting cylindrical fuse rated at 440 mA and 1000 V for AC and DC circuits. It fits Fluke DMM series meters and equivalent Bussmann DMM models, providing over-current protection during electrical measurements.

Standards and Construction

The fuse body is made from melamine and carries CE, RoHS and UL Recognized markings. A 10 kA interrupt rating at 1000 V AC ensures safe fault clearing, while the single-element design delivers consistent fast-acting response.

Measurement Protection Limits

The component protects circuits up to 1000 V and 440 mA, suitable for standard digital multimeter inputs. It will not serve higher-current ranges or voltages beyond the rated values, so users needing greater capacity must select a different fuse.

How it compares

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

Price $11.99
Cheaper than about 91% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameFLUKE

Questions about this item

When will the 440 mA fuse need replacement?

Replace the fuse after it interrupts a fault current; it is a single-element, non-indicating design so there is no visual or resettable feature — a new fuse must be installed each time.

What sustained current will open the 440 mA fuse first?

The fuse is rated 440 mA continuous; any current above that value will cause it to open, and the 10 kA interrupt rating at 1000 V AC defines the maximum fault it can safely clear.

How much heat does the 440 mA fuse generate during all-day operation?

At or below 440 mA the fuse runs at normal temperature rise for a melamine-bodied cylindrical fuse; no forced cooling is required and the body material is rated for continuous duty.

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