MDL-3-R

## 1 1 /4˝ x 1 /4˝  Time-Delay, Glass Tube Fuses 

## MDL Series 

## **Description** 

- 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 

|**Electrical Characteristics**|**Electrical Characteristics**|**Electrical Characteristics**|
|---|---|---|
|**Rated Current**|**% of Amp Rating**|**Opening Time**|
|1⁄16- 30A|**% of Amp Rating**<br>100%|**Opening Time**<br>None|
||135%|60 minutes maximum|
||200%|120 seconds maximum|
|1⁄16 -3A|200%|5 seconds minimum|
|3-2⁄10- 8A|200%|12 seconds minimum|



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

## **Agency Information** 

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

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

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

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

Drawing Not to Scale 

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

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

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38.10 32.82 38.10<br>(Class No. 1422-30) (1.500) (1.292) (1.500)<br>• CE<br>Environmental Data ae ee e ee<br>•<br>• Shock: 1A thru 30A – MIL-STD-202, Method 207, (HI Shock)Vibration: 1/4A thru 30A – MIL-STD-202, Method 204, Test S—- 6.76 e DIA. OF LEADS 4 4d<br>Condition C (Except 5g, 500HZ) (0.266) 0–15 AMP: 0.81<br>Ordering (0.032)<br>1.02<br>Specify packaging code 20–30 AMP:<br>(0.040)<br>•  Insert packaging code prefix before part number. E.g., BK<br>(or BK1)-MDL-5-R  31.75 6.35<br>(1.250) (0.250)<br>Specify option codes if desired<br>•  For axial leads, insert “V” between catalog series and amp rating. E.g., BK-MDL-V-5-R [TT L©T<br>Specifications<br>Part VoltageRating AC Interrupting Rating* (amps)@ Typical DC ColdResistance**  Melting ITypical [2] t† VoltageTypical<br>Number Vac 250Vac 125Vac 32Vac ( Ω ) AC Drop‡<br>aQO MDL-1/16-R 250 35 ee 10000 - ee 45.6 eee 0.0046 2.79<br>GG MDL-1/10-R 250 35 10000 - 15.68 0.0420 1.95<br>a MDL-1/8-R DG 250 35 10000 OO - 12.238 OO 0.0422 1.52<br>a MDL-3/16-R GG 250 35 10000 - ON 4.81 0.116 | 1.05<br>GO MDL-2/10-R 250 35 10000 - 5.234 0.314 0.972<br>a MDL-1/4-R 250 35 10000 OG - 3.208 OO 0.447 0.965<br>a MDL-3/10-R OOa 250 35 GO 10000 - G O 2.046 O| 0.412 | 0.808<br>QOGO MDL-MDL-1/2-R3/8-R 225050 3535 1100000000 OG -- 1.0.569473 OO 01..986562 1.41.276<br>a(GOO MDL-MDL-1-R3/4-R GG 225050 3535 1100000000 OG -- 00..273973 CO 11.44.34983 | 01..99501<br>a MDL-1-1/4-R 250 100 10000 - GO 0.205 86.2 0.722<br>a MDL-1-1/2-R OO 250 GO 100 10000 OG - 0.156 OO 22.7 0.721<br>a MDL-2-R GG 250 100 10000 - 0.116 62.3 | 0.644<br>GO MDL-2-1/4-R 250 100 10000 - 0.096 49.6 0.535<br>a MDL-2-1/2-R OO 250 100 10000 OG - 0.081 |OO 63.1 0.410<br>a MDL-3-R 250 GO 100 10000 GO| - 0.057 67.5 0.345<br>GO MDL-4-R 250 200 10000 - 0.038 19.3 0.187<br>a MDL-5-R 250 200 10000 OO - 0.025 OO 32.0 0.160<br>a(GOO MDL-MDL-66-R-1/4-R GG 225050 GO 220000 1100000000 OO -- 00.0.0222 OO 3387.4.7 | 00.1.15552<br>a MDL-7-R 250 200 10000 - GO 0.018 42.7 0.140<br>a MDL-8-R OO 250 GO 200 10000 OG - 0.015 OO 47.8 0.119<br>a MDL-9-R GG 32 - - 1000 0.012 51.5 | 0.124<br>GO MDL-10-R 32 - - 1000 0.01 64.4 0.114<br>a MDL-15-R OO 32 - - OG 1000 0.005 |OO 354.0 0.130<br>a MDL-20-R 32 GO - - GO| 1000 0.004 2914.0 0.530<br>GO MDL-25†† 32 - - 1000 0.01225 15221.0 0.30<br>MDL-30†† 32 - - 1000 0.0011 15581.0 0.40<br>ee QQOOOOOO<br>* Interrupting Ratings (Interrupting ratings were measured at 70% - 80% power factor on AC)<br>**----- End of picture text -----**<br>


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

- Typical Melting I[2] t (A[2] Sec) (I[2] t 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. 

0209    SB-BU08675 

Data Sheet 2004 

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## **Time-Current Curve** 

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


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


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


The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Cooper Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. 

Life Support Policy: Cooper Bussmann does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 

0209    SB-BU08675 

Data Sheet 2004 

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