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Five cylindrical ceramic fuses with silver end caps on a plain background

Bussmann

Bussmann MDA-5-R Ceramic Fuse 5 A 250 V AC Time-Delay 5 PK

SKU CH-DWW2-TA2QF

A 5 A 250 V AC time-delay ceramic fuse with 10 kA interrupt rating at 125 V AC, sold in a five pack

  • Time-delay action prevents nuisance trips during motor starts
  • Ceramic body withstands 10 kA fault current at 125 V AC
  • 200 A interrupt rating at 250 V AC protects downstream circuits
  • Standard 1-1/4 in x 1/4 in size fits common fuse blocks
  • Pack of five provides ready spares for maintenance

Ceramic Time-Delay Fuse 5 A 250 V AC

The Bussmann MDA-5-R is a ceramic-bodied cylindrical fuse rated at 5 amps and 250 volts AC. It uses a time-delay characteristic to tolerate brief inrush currents without opening. The non-rejection design fits standard 1-1/4 inch by 1/4 inch fuse clips. This pack supplies five identical units for replacement or spares.

Interrupt Ratings and Equivalent Series

The fuse interrupts 10kA at 125 V AC and 200 A at 250 V AC, defining its safe breaking capacity on different supply voltages. Direct equivalents include the Littelfuse 326 series and Mersen GSA series, allowing cross-reference when the exact Bussmann part is unavailable. Compatible fuse blocks span the 3823, HFA, HHN, HK, HKP, HPF, HRK, HTB and S-8000 series. These matches simplify sourcing for maintenance teams.

Single-Element Non-Indicating Construction

The single-element design means the fuse relies on one melting link for both overload and short-circuit response, with no separate indicator to show a blown state. Technicians must test continuity electrically or visually inspect the ceramic body after a fault. Buyers who need a visual-open flag or dual-element discrimination should select a different fuse type.

Highlights

  • Time-delay action prevents nuisance trips during motor starts
  • Ceramic body withstands 10 kA fault current at 125 V AC
  • 200 A interrupt rating at 250 V AC protects downstream circuits
  • Standard 1-1/4 in x 1/4 in size fits common fuse blocks
  • Pack of five provides ready spares for maintenance

Specifications

BrandEATON BUSSMANN

Questions about this item

Will the ceramic body need periodic replacement under normal operation?

The ceramic body is a single-use element; once the fuse interrupts a fault it must be replaced with another MDA-series fuse of the same 5 A, 250 V AC rating.

What interrupt rating limits sustained fault current at 250 V AC?

The fuse is rated to interrupt 200 A at 250 V AC, so any fault above that level would exceed its breaking capacity.

Does the fuse generate noticeable heat when carrying 5 A continuously?

At its rated 5 A the fuse runs warm but within design limits; the ceramic body and time-delay element are built for continuous 250 V AC operation without excessive temperature rise.

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