cooper bussmann

MDL Series 1/4˝x1-1/4˝ Time-Delay Glass Tube Fuses

  
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 CharacteristicsRated Current % of Amp Rating Opening Time 1⁄16 - 30A 100% None 135% 60 minutes maximum 200% 120 seconds maximum 1⁄16 - 3A 200% 5 seconds minimum 3-2⁄10 - 8A 200% 12 seconds minimum

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 
 
Environmental Data
• 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)
 
Ordering
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

Dimensions - mm (in)
Drawing Not to Scale


Specifications
Part
Number
Voltage Rating Vac AC Interrupting Rating* (amps)@ Typical DC Cold Resistance**  (Ω) Typicalt†
AC
Typical
Drop‡
250Vac 125Vac 32Vac
MDL-1/16-R 250 35 10000 - 45.6 0.0046 2.79
MDL-1/10-R 15.68 0.042 1.95
MDL-1/8-R 12.238 0.0422 1.52
MDL-3/16-R 4.81 0.116 1.05
MDL-2/10-R 5.234 0.314 0.972
MDL-1/4-R 3.208 0.447 0.965
MDL-3/10-R 2.046 0.412 0.808
MDL-3/8-R 1.567 0.982 1.46
MDL-1/2-R 0.943 1.656 1.27
MDL-3/4-R 0.397 4.343 1.01
MDL-1-R 0.273 11.498 0.995
MDL-1-1/4-R 100 0.205 86.2 0.722
MDL-1-1/2-R 0.156 22.7 0.721
MDL-2-R 0.116 62.3 0.644
MDL-2-1/4-R 0.096 49.6 0.535
MDL-2-1/2-R 0.081 63.1 0.41
MDL-3-R 0.057 67.5 0.345
MDL-4-R 200 0.038 19.3 0.187
MDL-5-R 0.025 32 0.16
MDL-6-R 0.022 37.4 0.155
MDL-6-1/4-R 0.02 38.7 0.152
MDL-7-R 0.018 42.7 0.14
MDL-8-R 0.015 47.8 0.119
MDL-9-R 32 - - 1000 0.012 51.5 0.124
MDL-10-R 0.01 64.4 0.114
MDL-15-R 0.005 354 0.13
MDL-20-R 0.004 2914 0.53
MDL-25†† 0.01225 15221 0.3
MDL-30†† 0.0011 15581 0.4
* Interrupting Ratings (Interrupting ratings were measured at 70% - 80% power factor on AC)
** DC Cold Resistance (Measured at ≤10% of rated current)
† Typical Melting I2t (A2Sec) (I2t 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.

Time-Current Curve


Packaging Code
Packaging  Code Description
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 Axial leads - copper tinned wire with nickel plated brass overcaps

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