BK/MDA-2-R

Effective June 2017 Supersedes July 2011 

Technical Data **2002** 

## MDA 

## 1/4” x 1 1/4” Time-delay ceramic tube fuses 

## **Agency information** 

- UL Listed Card: MDA 2/10 - 20A (Guide JDYX, File E19180) 

- UL Recognized Card: MDA 25 - 30A (Guide JDYX2, File E19180) 

- CSA Certification Card: MDA 2/10 - 20 (Class No. 1422-01) 

- CSA Component Acceptance: MDA 25-30A (Class No. 1422-30) 

## **Environmental data** 

## **Product features** 

- Time-delay 

- Optional axial leads available 

- 1/4” x 1-1/4” (6.35 x 31.75mm) physical size 

- Ceramic tube, nickel-plated brass endcap construction 

- UL Listed product meets standard 248-14 

- Shock: 1/100A and 8/10A – MIL-STD-202, Method 213, Test Condition I;  1A thru 30A – MIL-STD-202, Method 213, Test Condition J 

- Vibration: 1/100A and 8/10A – MIL-STD-202, Method 201; 1/4A thru 30A – MIL-STD-202, Method 204, Test Condition C (Except 5g, 500Hz) 

## **Ordering** 

- Specify packaging, product and option code. 

|**Electrical Characteristics**|**Electrical Characteristics**|**Electrical Characteristics**|
|---|---|---|
|Rated Current|Amp Rating|Opening Time|
|1/4 - 30A|Amp Rating<br>100%|Opening Time<br>None|
||135%|60 Minutes Max.|
||200%|120 Seconds Max.|



## **Specifications** 

|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|**Specifications**<br>AC Interrupting<br>Part<br>Voltage Rating<br>Rating* (A)<br>DC Interrupting<br>Rating (A)125V<br>Typical DC Cold<br>Typical<br>Typical Voltage<br>Number<br>Vac<br>Vdc<br>250V<br>125V<br>Resistance** (Ω)<br>MeltingI2t† AC<br>Drop‡|
|---|---|---|---|---|---|---|---|---|
||Vac|Vdc|250V|125V|||||
|MDA-1/4-R|250|-|35|10000|-|8.7|0.748|4.00|
|MDA-1/2-R|250|-|35|10000|-|1.78|2.53|1.42|
|MDA-3/4-R|250|-|35|10000|-|0.82|8.58|1.31|
|MDA-1-R|250|-|35|10000|-|0.56|12.21|1.03|
|MDA-1-1/2-R|250|-|100|10000|-|0.2565|27.5|0.691|
|MDA-2-R|250|-|100|10000|-|0.17|70.4|0.623|
|MDA-2-1/2-R|250|-|200|10000|-|0.068|31.79|0.213|
|MDA-3-R|250|-|200|10000|-|0.0525|44.99|0.182|
|MDA-4-R|250|-|200|10000|-|0.03575|147.4|0.162|
|MDA-5-R|250|-|200|10000|-|0.0256|380.49|0.145|
|MDA-6-R|250|-|200|10000|-|0.02035|587.73|0.141|
|MDA-7-R|250|-|200|10000|-|0.0165|638.33|0.137|
|MDA-8-R|250|-|200|10000|-|0.013|1038.4|0.134|
|MDA-10-R|250|-|200|10000|-|0.00925|1620.43|0.135|
|MDA-12-R|250|-|750|10000|-|0.00755|125.18|0.128|
|MDA-15-R<br>~~—————~~|250<br>~~—————~~|-<br>~~—————~~|750<br>~~—————~~|10000<br>~~—————~~|-<br>~~———~~|0.00565<br>~~———~~|336.82<br>~~———~~|0.107|
|MDA-20-R<br>~~—————~~|250<br>~~—————~~|125<br>~~—————~~|1500<br>~~—————~~|10000<br>~~—————~~|10000<br>~~———~~|0.004065<br>~~———~~|483.45<br>~~———~~|0.095|
|MDA-25A-R<br>~~—————~~|250<br>~~—————~~|125<br>~~—————~~|1500<br>~~—————~~|10000<br>~~—————~~|10000<br>~~———~~|0.0031<br>~~———~~|734.69<br>~~———~~|0.105|
|MDA-30A-R<br>~~—————~~|250<br>~~—————~~|125<br>~~—————~~|1500<br>~~—————~~|10000<br>~~—————~~|10000<br>~~———~~|0.002465<br>~~———~~|1096.7<br>~~———~~|0.110|



* Interrupting Ratings (Measured at 70% - 80% power factor on AC. The interrupting ratings for 25A, 30A were measured at 90% - 100% power factor on AC) 

- ** DC Cold Resistance (Measured at _<10% of rated current) 

- Typical Melting I[2] t (A2Sec) (I[2] t was measured at listed interrupting rating and rated voltage) 

- Typical Voltage Drop (Voltage drop was measured at 25°C ambient temperature at rated current) 

MDA 

Technical Data 2002 Effective June 2017 

1/4” x 1 1/4” Time-delay ceramic tube fuses 

## **Time-Current Curves** 

## Dimensions - mm (in) 

Drawing Not to Scale 

**==> picture [203 x 141] intentionally omitted <==**

**----- Start of picture text -----**<br>
38.10 32.82 38.10<br>(1.500) (1.292) (1.500)<br>6.76 DIA. OF LEADS<br>(0.266) 0.81<br>0–15 AMP:<br>(0.032)<br>1.02<br>20–30 AMP:<br>(0.040)<br>31.75 6.35<br>(1.250) (0.250)<br>**----- End of picture text -----**<br>


**==> picture [255 x 346] intentionally omitted <==**

**----- Start of picture text -----**<br>
CURRENT  IN  AMPS<br>1/4 1/2 1 2 2/103- 4 5 1/46- 10 12 15 20 25 30<br>TIME   IN  S E C ONDS<br>**----- End of picture text -----**<br>


CURRENT  IN  AMPS 

|Packaging Code|Packaging Code|
|---|---|
|Packaging Code Prefx|<br>Description|
|<br>BK-|100 fuses packed into a cardboard carton|
|BK1-|1,000 fuses packed into a cardboard carton|
|BK8-|8,000 fuses packed into a cardboard carton|
|||
|Option Code||
|Option Code|Description|
|B|Sealed to withstand aqueous cleaning (Board Washable)|
|V|<br>Axial leads - copper tinned wire with nickel plated brass overcaps|



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## **Eaton** 

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