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BK/MDA-20-R Ceramic cartridge fuse, 20A, 250VAC/125VDC, slow blow. 3AB 1/4" x 1-1/4" package, requires holder.
Mfr Part #:

BK/MDA-20-R

Available from 1 distributors
Mfr Name: Eaton - Electronics Division
Eaton - Electronics Division
Ceramic cartridge fuse, 20A, 250VAC/125VDC, slow blow. 3AB 1/4" x 1-1/4" package, requires holder.
Total Stock: 1,800 pcs
$ Price Range: $1.03 - $2.80

BK/MDA-20-R Available from 1 distributor

Authorised
Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Non-Authorised Inventory information
1,800 pcs
1800 pcs On Request 1 On Request On Request On Request On Request On Request

BK/MDA-20-R Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Approval Agency
Breaking Capacity (Maximum @ 125 V DC)
Breaking Capacity (Maximum @ 250 V AC)
Breaking Capacity @ Rated Voltage
Current Rating
Current Rating (Amps)
Fuse Type
Melting I²t
Mounting Type
Package / Case
Response Time
Size / Dimension
Voltage Rating
Voltage Rating (Maximum @ AC)
Voltage Rating (Maximum @ DC)

BK/MDA-20-R Description

Short technical summary and product information.

The Eaton BK/MDA-20-R is a 20A slow blow ceramic cartridge fuse designed for overcurrent protection in circuits with high inrush currents. It is rated for 250VAC and 125VDC operation, with a breaking capacity of 1.5kA at 250VAC and 10kA at 125VDC.

 

With a melting I²t of 483.45 A²s, this fuse can tolerate brief surge currents without nuisance opening. The slow blow response makes it suitable for applications such as power supplies, motor start-ups, and capacitive loads.

 

The fuse is housed in the standard 3AB (3AG) package measuring 0.250" diameter by 1.250" length (6.35mm x 31.75mm). It requires a compatible fuse holder for installation. Approvals include CE, CSA, and UL.

BK/MDA-20-R Quick Information

Product Type: Ceramic Cartridge Fuse
Series: MDA
Canonical Name: Eaton BK/MDA-20-R 20A 250VAC/125VDC Slow Blow Ceramic Cartridge Fuse
Subcategory: Slow Blow Fuse

BK/MDA-20-R Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BK/MDA-20-R Estimated Pricing

Qty Low High
1+ $2.80 $2.80
5+ $2.32 $2.32
10+ $2.14 $2.14
50+ $1.77 $1.77
100+ $1.64 $1.64
300+ $1.44 $1.44
500+ $1.36 $1.36
1,000+ $1.25 $1.25
5,000+ $1.03 $1.03

Estimated market price range - modelled values for guidance only, not live distributor offers.

BK/MDA-20-R Features

  • 20A current rating for overcurrent protection.
  • Rated for 250VAC and 125VDC operation.
  • Slow blow response for inrush current tolerance.
  • High breaking capacity up to 10kA DC.
  • Ceramic cartridge construction for durability.

BK/MDA-20-R Applications

  • Used in power supply and motor protection.
  • Suitable for industrial control equipment.
  • Protects circuits with high capacitive loads.
  • Ideal for automotive and electronic systems.

BK/MDA-20-R FAQs

6 frequently asked questions generated from this part’s specifications.
What is the current rating of the BK/MDA-20-R fuse?

The current rating is 20 A.

What are the voltage ratings for this fuse?

It is rated for 250 VAC maximum and 125 VDC maximum.

What is the breaking capacity of the BK/MDA-20-R?

The breaking capacity is 1.5 kA at 250 VAC and 10 kA at 125 VDC.

Is the BK/MDA-20-R a fast-acting or slow blow fuse?

It is a slow blow (time-delay) fuse.

What is the package size of this fuse?

It comes in the 3AB, 3AG package measuring 0.250" diameter x 1.250" length (6.35mm x 31.75mm).

What is the melting I²t value of the BK/MDA-20-R?

The melting I²t is 483.45 A²s.

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