cooper bussmann

MDA Series 1/4˝x1-1/4˝ Time-Delay Ceramic Tube Fuses

  
Description
• 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

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


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
• 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

Dimensions - mm (in)
Drawing Not to Scale



SPECIFICATIONS
Part Number Voltage Rating AC Interrupting Rating* (amps) DC Interrupting Rating (amps) Typical DC Cold Resistance** (Ω) Typical Melting I2t† AC Typical Voltage Drop‡
Vac Vdc 250V 125V 125V
MDA-1/4-R 250 - 35 10000 - 9.325 0.748 4
MDA-1/2-R 1.925 2.53 1.42
MDA-3/4-R 0.8555 8.58 1.31
MDA-1-R 0.56 12.21 1.03
MDA-1-1/2-R 100 0.2585 27.5 0.691
MDA-2-R 0.17 70.4 0.623
MDA-2-1/2-R 200 0.06685 31.79 0.213
MDA-3-R 0.0535 44.99 0.182
MDA-4-R 0.03625 147.4 0.162
MDA-5-R 0.0261 380.49 0.145
MDA-6-R 0.0212 587.73 0.141
MDA-7-R 0.0169 638.33 0.137
MDA-8-R 0.0135 1038.4 0.134
MDA-10-R 0.00948 1620.43 0.135
MDA-12-R 750 0.00725 125.18 0.128
MDA-15-R 0.00553 336.82 0.107
MDA-20-R 125 1500 10000 0.004 483.45 0.095
MDA-25A-R 0.00305 734.69 0.105
MDA-30A-R 0.00243 1096.7 0.11
* Interrupting Ratings (Measured at 70% - 80% power factor on AC. The interrupting ratings for 25Amp, 30Amp were measured at 90% - 100% 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 ambient temperature at rated current)

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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