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Five cylindrical ceramic fuses with metal end caps

Bussmann

Bussmann MDA-7-R Ceramic Fuse 7A 250V Time-Delay 5 Pack

SKU CH-52SZ-S5V7A

Ceramic time-delay fuse rated 7 A at 250 V AC with 10 kA interrupt at 125 V and 200 A at 250 V, supplied in a pack of five

  • Time-delay design tolerates motor-start surges without nuisance trips
  • Ceramic body withstands 10 kA interrupt at 125 V AC
  • 200 A interrupt rating at 250 V AC protects downstream gear
  • Direct cross for Littelfuse 326 and Mersen GSA series
  • Standard 1-1/4 × 1/4 in cylindrical fits common fuse blocks

Fuse for 7 A circuits

The Bussmann MDA-7-R is a ceramic time-delay fuse rated for 7 amps at 250 volts AC. It comes in a pack of five for maintenance or replacement in compatible equipment. The cylindrical body measures 1-1/4 inches long by 1/4 inch in diameter. This non-indicating fuse suits applications needing a standard MDA series part.

Interrupt ratings by voltage

The fuse interrupts up to 10kA at 125 volts AC and 200 amps at 250 volts AC. These two ratings define the practical limit of fault current the device can safely clear at each voltage level. Exceeding the stated interrupt capacity at the applied voltage risks failure to open. The time-delay characteristic helps ride through brief inrush currents.

MDA series cross-reference

This fuse crosses to Littelfuse 326 and Mersen GSA series equivalents. It fits compatible fuse block series including 3823, HFA, HHN, HK, HKP, HPF, HRK, HTB and S-8000. Buyers needing a different ampere rating, a rejection-style body or an indicating version cannot use this part.

Highlights

  • Time-delay design tolerates motor-start surges without nuisance trips
  • Ceramic body withstands 10 kA interrupt at 125 V AC
  • 200 A interrupt rating at 250 V AC protects downstream gear
  • Direct cross for Littelfuse 326 and Mersen GSA series
  • Standard 1-1/4 × 1/4 in cylindrical fits common fuse blocks

Specifications

BrandEATON BUSSMANN

Questions about this item

Should I choose the 5-pack or buy fuses individually?

The product is supplied as a 5-pack of identical 7 A, 250 V AC ceramic time-delay fuses, so you receive five pieces in one order.

What does the 200 A interrupt rating at 250 V AC mean for my circuit?

It means the fuse can safely break a fault current of up to 200 A at 250 V AC without rupturing, protecting wiring and equipment on that supply.

How does the 10 kA rating at 125 V AC affect fuse selection?

At 125 V AC the same fuse withstands a much higher prospective short-circuit current of 10 kA, so it is suitable for panels or equipment fed from a stiffer 125 V source.

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