MDL-20-R

Effective June 2017 Supersedes February 2009 

Technical Data **2004** 

## MDL 

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

## **Agency information** 

- UL Listed Card: MDL 1/16 - 8A (Guide JDYX, File E19180) 

- UL Recognized Card: MDL 9 - 30A (Guide JDYX2, File E19180) 

- CSA Certification Card: MDL 1/16 - 8A (Class No. 1422-01) 

- CSA Component Acceptance: MDL 9-30A (Class No. 1422-30) 

- CE 

## **Ordering** 

## **Product features** 

- Time-delay 

- Optional axial leads available 

- 1⁄4 x 1 1⁄4 (6.4 x 31.7mm) physical size 

- Glass tube, nickel-plated brass endcap construction 

- UL Listed product meets standard 248-14 

## **Environmental data** 

- Specify packaging code 

- Insert packaging code prefix before part number. E.g., BK (or BK1)-MDL-5-R 

- Specify option codes if desired 

- For axial leads, insert “V” between catalog series and amp rating. E.g., BK-MDL-V-5-R 

- For board washable, insert “B” between catalog series and amp rating. E.g., BK-MDL-B-5-R 

- For axial leads and board washable, insert “B” then “V” between catalog series and amp rating. E.g., BK-MDL-BV-5-R 

• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI Shock) 

• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204, Test Condition C (Except 5g, 500HZ) 

|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|between catalog series and amp rating. E.g., BK-MDL-BV-5-R<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI<br>Shock)<br>• Vibration: 1/4A thru 30A – MIL-STD-202, Method 204,<br>Test Condition C (Except 5g, 500HZ)<br>**Environmental data**|
|---|---|---|---|---|---|---|---|
|**Specifications**<br>**Voltage**<br>**Typical DC Cold**<br>**Typical**<br>**Typical**<br>**Part**<br>**Rating**<br>**AC Interrupting Rating* (amps)@**<br>**Resistance****<br>**Melting  I 2t†**<br>**Voltage**<br>**Number**<br>**Vac**<br>**250Vac**<br>**125Vac**<br>**32Vac**<br>**AC**<br>**Drop‡**<br>**(**Ω**)**<br>~~ee~~<br>~~ee~~<br>~~a~~<br>~~Qe~~||||||||
|||**250Vac**<br>~~ee~~|**125Vac**<br>~~ee~~|**32Vac**||||
|**MDL-1/16-R**<br>~~Qe~~|250<br>~~Qe~~|35<br>~~ee~~<br>~~GC~~|10000<br>~~ee~~<br>~~GC ~~|-<br> ~~GC~~|45.6<br>**()**<br>~~a~~<br>~~GC~~|0.0046<br>~~GC~~|**p‡**<br>2.79<br>~~GC~~|
|**MDL-1/10-R**<br>~~a~~|250<br>~~QO~~|35<br>~~QO~~|10000<br>~~OQ~~<br>~~GC~~|-<br>~~OQ~~<br>~~GC~~|15.68<br>~~GC~~|0.0420<br>~~QO~~|1.95<br>~~QO~~|
|**MDL-1/8-R**<br>~~GG~~<br>~~GG~~|250<br>~~GG~~<br>~~GG~~|35<br>~~GG~~<br>~~GG~~|10000<br>~~GG~~<br>~~GC~~<br>~~**G**~~|-<br>~~GG~~<br>~~GC~~<br>~~**G**G~~|12.238<br>~~GG~~<br>~~GC~~<br>~~G~~|0.0422<br>~~GG~~|1.52<br>~~GG~~|
|**MDL-3/16-R**<br>~~GG~~<br>~~GG~~<br>~~GG~~|250<br>~~GG~~<br>~~GG~~<br>~~GG~~|35<br>~~GG~~<br>~~GG~~<br>~~GG~~|10000<br>~~GG~~<br>~~GC~~<br>~~GG~~<br>~~**G**~~|-<br>~~GG~~<br>~~GC~~<br>~~GG~~<br>~~**G**G~~|4.81<br>~~GG~~<br>~~GC~~<br>~~GG~~<br>~~G~~|0.116<br>~~GG~~<br>~~GG~~|1.05<br>~~GG~~<br>~~GG~~|
|**MDL-2/10-R**<br>~~GG~~<br>~~GG~~|250<br>~~GG~~<br>~~GG~~|35<br>~~GG~~<br>~~GG~~|10000<br>~~GG~~<br>~~**G**~~|-<br>~~GG~~<br>~~**G**G~~|5.234<br>~~GG~~<br>~~G~~<br>~~G~~|0.314<br>~~GG~~<br>~~G~~|0.972<br>~~GG~~<br>~~G~~|
|**MDL-1/4-R**<br>~~GG~~<br>~~GG~~<br>~~a~~|250<br>~~GG~~<br>~~GG~~<br>~~GG~~|35<br>~~GG~~<br>~~GG~~<br>~~GG~~|10000<br>~~**G**~~<br>~~GO~~<br>~~GC~~|-<br>~~**G**G~~<br>~~GO~~<br>~~GC~~|3.208<br>~~G~~<br>~~G~~<br>~~GO~~<br>~~GC~~|0.447<br>~~G~~<br>~~GO~~|0.965<br>~~G~~<br>~~GO~~|
|**MDL-3/10-R**<br>~~a~~<br>~~a~~|250<br>~~GG~~|35<br>~~GG~~|10000<br>~~GC~~<br>~~C~~|-<br>~~GC~~<br>~~C~~~~**C**~~|2.046<br>~~GC~~<br>~~**C**~~|0.412|0.808|
|**MDL-3/8-R**<br>~~a~~<br>~~sO~~<br>~~a~~|250<br>~~GG~~<br>~~sO~~<br>~~Qe~~|35<br>~~GG~~<br>~~sO~~<br>~~Qe~~|10000<br>~~GC~~<br>~~sO~~<br>~~C~~<br>~~G~~|-<br>~~GC~~<br>~~sO~~<br>~~C~~~~**C**~~<br>~~G~~|1.567<br>~~GC~~<br>~~sO~~<br>~~**C**~~|0.982<br>~~sO~~<br>~~QO~~|1.46<br>~~sO~~<br>~~QO~~|
|**MDL-1/2-R**<br>~~a~~|250<br>~~Qe~~|35<br>~~Qe~~|10000<br>~~C~~<br>~~G~~<br>~~GC~~|-<br>~~C~~~~**C**~~<br>~~G~~<br>~~GC~~|0.943<br>~~**C**~~<br>~~GC~~|1.656<br>~~QO~~|1.27<br>~~QO~~|
|**MDL-3/4-R**<br>~~GG~~|250<br>~~Qe~~<br>~~GG~~|35<br>~~Qe~~<br>~~GG~~|10000<br>~~G~~<br>~~GG~~<br>~~GC~~<br>~~GG~~|-<br>~~G~~<br>~~GG~~<br>~~GC~~<br>~~GG~~|0.397<br>~~GG~~<br>~~GC~~<br>~~GG~~|4.343<br>~~QO~~<br>~~GG~~|1.01<br>~~QO~~<br>~~GG~~|
|**MDL-1-R**<br>~~GG~~<br>~~GG~~|250<br>~~GG~~<br>~~GG~~|35<br>~~GG~~<br>~~GG~~|10000<br>~~GG~~<br>~~GC~~<br>~~GG~~<br>~~GG~~<br>~~GG~~|-<br>~~GG~~<br>~~GC~~<br>~~GG~~<br>~~GG~~<br>~~GG~~|0.273<br>~~GG~~<br>~~GC~~<br>~~GG~~<br>~~GG~~<br>~~GG~~|11.498<br>~~GG~~<br>~~GG~~<br>~~GO~~|0.995<br>~~GG~~<br>~~GG~~<br>~~GO~~|
|**MDL-1-1/4-R**<br>~~GG~~<br>~~QO~~|250<br>~~GG~~<br>~~QO~~|100<br>~~GG~~<br>~~QO~~|10000<br>~~GG~~<br>~~GG~~<br>~~QO~~<br>~~GG~~<br>~~GG~~|-<br>~~GG~~<br>~~GG~~<br>~~QO~~<br>~~GG~~<br>~~GG~~|0.205<br>~~GG~~<br>~~GG~~<br>~~QO~~<br>~~GG~~<br>~~GG~~|86.2<br>~~GG~~<br>~~QO~~<br>~~GO~~|0.722<br>~~GG~~<br>~~QO~~<br>~~GO~~|
|**MDL-1-1/2-R**<br>~~QO~~<br>~~CG~~<br>~~a~~|250<br>~~QO~~<br>~~CG~~|100<br>~~QO~~<br>~~CG~~|10000<br>~~QO~~<br>~~GG~~<br>~~CG~~<br>~~GG~~<br>~~O~~|-<br>~~QO~~<br>~~GG~~<br>~~CG~~<br>~~GG~~<br>~~O~~~~**C**~~|0.156<br>~~QO~~<br>~~GG~~<br>~~CG~~<br>~~GG~~<br>~~**C**~~|22.7<br>~~QO~~<br>~~GO~~<br>~~CG~~|0.721<br>~~QO~~<br>~~GO~~<br>~~CG~~|
|**MDL-2-R**<br>~~QO~~<br>~~a~~|250<br>~~QO~~<br>~~GG~~|100<br>~~QO~~<br>~~GG~~|10000<br>~~GG~~<br>~~QO~~<br>~~O~~<br>~~C~~|-<br>~~GG~~<br>~~QO~~<br>~~O~~~~**C**~~<br>~~C~~|0.116<br>~~GG~~<br>~~QO~~<br>~~**C**~~|62.3<br>~~QO~~<br>~~QO~~|0.644<br>~~QO~~<br>~~QO~~|
|**MDL-2-1/4-R**<br>~~a~~<br>~~a~~|250<br>~~GG~~|100<br>~~GG~~|10000<br>~~O~~<br>~~C~~<br>~~OQ~~|-<br>~~O~~~~**C**~~<br>~~C~~<br>~~OQ~~|0.096<br>~~**C**~~<br>~~OQ~~|49.6<br>~~QO~~<br>~~OO~~|0.535<br>~~QO~~<br>~~OO~~|
|**MDL-2-1/2-R**<br>~~QQ~~<br>~~a~~<br>~~GG~~|250<br>~~GG~~<br>~~QQ~~<br>~~GG~~|100<br>~~GG~~<br>~~QQ~~<br>~~GG~~|10000<br>~~C~~<br>~~QQ~~<br>~~OQ~~|-<br>~~C~~<br>~~QQ~~<br>~~OQ~~|0.081<br>~~QQ~~<br>~~OQ~~|63.1<br>~~QO~~<br>~~QQ~~<br>~~OO~~|0.410<br>~~QO~~<br>~~QQ~~<br>~~OO~~<br>~~|~~|
|**MDL-3-R**<br>~~a~~<br>~~GG~~|250<br>~~GQ~~<br>~~GG~~|100<br>~~GQ ~~<br>~~GG~~|10000<br>~~OQ~~<br> ~~GG~~|-<br>~~OQ~~<br>~~GG~~|0.057<br>~~OQ~~<br>~~GG~~|67.5<br>~~OO~~<br>~~GG~~|0.345<br>~~OO~~<br>~~GG~~<br>~~|~~|
|**MDL-4-R**<br>~~GG~~|250<br>~~GG~~|200<br>~~GG~~|10000<br>~~GO~~|-<br>~~GO~~|0.038<br>~~GO~~|19.3<br>~~GO~~|0.187<br>~~|~~<br>~~GO~~|
|**MDL-5-R**<br>~~GG~~<br>~~GG~~<br>~~a~~|250<br>~~GG~~<br>~~GG~~|200<br>~~GG~~<br>~~GG~~|10000<br>~~GO~~<br>~~GG~~<br>~~GG~~|-<br>~~GO~~<br>~~GG~~<br>~~GG~~|0.025<br>~~GO~~<br>~~GG~~<br>~~GG~~|32.0<br>~~GO~~<br>~~GG~~<br>~~OO~~|0.160<br>~~|~~<br>~~GO~~<br>~~GG~~<br>~~OO~~|
|**MDL-6-R**<br>~~GG~~<br>~~CG~~<br>~~a~~|250<br>~~GG~~<br>~~CG~~|200<br>~~GG~~<br>~~CG~~|10000<br>~~GG~~<br>~~CG~~<br>~~GG~~|-<br>~~GG~~<br>~~CG~~<br>~~GG~~|0.022<br>~~GG~~<br>~~CG~~<br>~~GG~~|37.4<br>~~GG~~<br>~~CG~~<br>~~OO~~|0.155<br>~~GG~~<br>~~CG~~<br>~~OO~~|
|**MDL-6-1/4-R**<br>~~a~~<br>~~a~~|250<br>~~QC~~<br>~~GG~~|200<br>~~QC ~~<br>~~GG~~|10000<br>~~GG~~<br> ~~GO~~<br>~~CC~~|-<br>~~GG~~<br>~~GO~~<br>~~CC~~|0.02<br>~~GG~~<br>~~GO~~<br>~~CC~~|38.7<br>~~OO~~<br>~~GO~~<br>~~QO~~|0.152<br>~~OO~~<br>~~GO~~<br>~~QO~~|
|**MDL-7-R**<br>~~a~~<br>~~a~~|250<br>~~GG~~|200<br>~~GG~~|10000<br>~~CC~~<br>~~OQ~~|-<br>~~CC~~<br>~~OQ~~|0.018<br>~~CC~~<br>~~OQ~~|42.7<br>~~QO~~<br>~~OO~~|0.140<br>~~QO~~<br>~~OO~~|
|**MDL-8-R**<br>~~a~~<br>~~QQ~~<br>~~a~~|250<br>~~GG~~<br>~~QQ~~|200<br>~~GG~~<br>~~QQ~~|10000<br>~~CC~~<br>~~QQ~~<br>~~OQ~~|-<br>~~CC~~<br>~~QQ~~<br>~~OQ~~|0.015<br>~~CC~~<br>~~QQ~~<br>~~OQ~~|47.8<br>~~QO~~<br>~~QQ~~<br>~~OO~~|0.119<br>~~QO~~<br>~~QQ~~<br>~~OO~~|
|**MDL-9-R**<br>~~a~~<br>~~Rs~~|32<br>~~GG~~<br>|-<br>~~GG~~<br>|-<br>~~OQ~~<br>~~GG~~<br>~~**G**G~~|1000<br>~~OQ~~<br>~~GG~~<br>~~G~~|0.012<br>~~OQ~~<br>~~GG~~<br>~~CG~~|51.5<br>~~OO~~<br>~~GG~~<br>~~CG~~|0.124<br>~~OO~~<br>~~GG~~<br>~~CG~~|
|**MDL-10-R**<br>~~GG~~<br>~~Rs~~|32<br>~~GG~~<br>|-<br>~~GG~~<br>|-<br>~~GG~~<br>~~**G**G~~|1000<br>~~GG~~<br>~~G~~|0.01<br>~~GG~~<br>~~CG~~|64.4<br>~~GG~~<br>~~CG~~|0.114<br>~~GG~~<br>~~CG~~|
|**MDL-15-R**<br>~~GG~~<br>~~Rs~~<br>~~QO~~|32<br>~~GG~~<br>~~QO~~<br>~~QO~~|-<br>~~GG~~<br>~~QO~~<br>~~QO~~|-<br>~~GG~~<br>~~**G**G~~<br>~~GG~~<br>|1000<br>~~GG~~<br>~~G~~<br>~~GG~~<br>|0.005<br>~~GG~~<br>~~CG~~<br>~~O~~<br>~~GG~~<br>|354.0<br>~~GG~~<br>~~CG~~<br>~~O~~<br>|0.130<br>~~GG~~<br>~~CG~~<br>~~O~~<br>|
|**MDL-20-R**<br>~~Rs~~<br>~~GG~~<br>~~QO~~|32<br>~~QO~~<br>~~GG~~<br>~~QO~~|-<br>~~QO~~<br>~~GG~~<br>~~QO~~|-<br>~~**G**G~~<br>~~GG~~<br>~~GG~~<br>|1000<br>~~G ~~<br>~~GG~~<br>~~GG~~<br>|0.004<br> ~~CG~~<br>~~O~~<br>~~GG~~<br>~~GG~~<br>|2914.0<br>~~CG~~<br>~~O~~<br>~~GG~~<br>|0.530<br>~~CG~~<br>~~O~~<br>~~GG~~<br>|
|**MDL-25††**<br>~~QO~~<br>~~Rs~~|32<br>~~QO~~<br>|-<br>~~QO ~~<br>|-<br>~~GG~~<br> ~~GO~~|1000<br>~~GG~~<br>~~GO~~|0.01225<br>~~GG~~<br>~~GO~~|15221.0<br>~~GO~~|0.30<br>~~GO~~|
|**MDL-30††**<br><br>~~Rs~~|32<br><br>~~a~~|-<br> <br>~~a~~|-<br> ~~GO~~<br>~~GO~~|1000<br>~~GO~~<br>~~GO~~|0.0011<br>~~GO~~<br>~~GO~~|15581.0<br>~~GO~~<br>~~GO~~|0.40<br>~~GO~~<br>~~GO~~|



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

- Typical Melting I 2t (A 2Sec) (I 2t was measured at listed interrupting rating and rated voltage.) 

- Typical Voltage Drop (Voltage drop was measured at 25°C±3°C ambient temperature at rated current) 

- †† MDL-25 & MDL-30 not available in RoHS compliant construction. 

MDL 

Technical Data 2004 Effective June 2017 

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

## **Time-Current Curve** 

## **Dimensions - mm** ( **in** ) 

Drawing Not to Scale 

**==> picture [191 x 130] 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 [296 x 385] intentionally omitted <==**

**----- Start of picture text -----**<br>
Current in Amps<br>Current in Amps<br>Time in Seconds Time in Seconds<br>**----- End of picture text -----**<br>


## **Packaging Code** 

**Packaging Code Description BK** 100 fuses packed into a cardboard carton 

||**Option Code**|
|---|---|
|**Option Code**|**Description**|
|**B**|Sealed towithstand aqueous cleaning<br>**(**BoardWashable)|
|**V**|Axial leads - copper tinned wire with nickel plated brass overcaps|



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© 2017 Eaton All Rights Reserved Printed in USA Publication No. 2004 SB-BU08675 June 2017 

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