1/4" x 1-1/4" Fuses
MDA Series, Time Delay, Ceramic Tube
Description
• Time Delay, ceramic tube
• Optional axial leads available
• 1/4 x 1-1/4 (6.3mm x 32mm) physical size
• Ceramic tube, nickel-plated brass endcap construction
• UL Listed product meets standard 248-14
ELECTRICAL CHARACTERISTICS
Amp Rating
Opening Time
Rated Current
None
100%
1/4 - 30A
135%
60 Minutes Max.
200%
120 Seconds Max.
RoHS
2002/95/EC
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 207,
(HI Shock)
• 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
Product
Code
MDA-1/4
MDA-1/2
MDA-3/4
MDA-1
MDA-1-1/2
MDA-2
MDA-2-1/2
MDA-3
MDA-4
MDA-5
MDA-6
MDA-7
MDA-8
MDA-10
MDA-12
MDA-15
MDA-20
MDA-25A
MDA-30A
*
**
†
‡
Voltage
Rating
AC
DC
250V
-
250V
-
250V
-
-
250V
250V
-
250V
-
250V
-
250V
-
250V
-
250V
-
250V
-
250V
-
-
250V
250V
-
250V
-
-
250V
250V
125V
250V
125V
250V
125V
AC Interrupting
Rating*
250V
125V
35A
10000A
35A
10000A
35A
10000A
35A
10000A
100A
10000A
100A
10000A
200A
10000A
200A
10000A
200A
10000A
200A
10000A
200A
10000A
200A
10000A
200A
10000A
200A
10000A
750A
10000A
10000A
750A
1500A
10000A
1500A
10000A
1500A
10000A
DC Interrupting
Rating
125V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10000A
10000A
10000A
Typical DC Cold
Resistance**
(ohms)
9.325
1.925
0.8555
0.560
0.2585
0.1645
0.06685
0.0507
0.0346
0.02355
0.01850
0.01475
0.01230
0.00858
0.00725
0.00543
0.00358
0.00309
0.00243
Typical
Melting I
2
t†
AC
0.68
2.3
7.8
11.1
25.0
64.0
28.9
40.9
134.0
345.9
534.3
580.3
944.0
1491.3
113.8
206.2
439.5
667.9
997.0
Typical
Voltage
Drop‡
4.00
1.42
1.31
1.03
0.691
0.623
0.213
0.182
0.162
0.145
0.141
0.137
0.134
N/A
0.114
0.107
0.095
0.105
0.110
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 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 ambient temperature at rated current)
1/4" x 1-1/4" Fuses
MDA Series, Time Delay, Ceramic Tube
TIME CURRENT CURVE
CURRENT IN AMPERES
1/4
3-2/10
4
5
6-1/4
1/2
TIME IN SECONDS
10
12
15
20
25
30
1
2
TIME IN SECONDS
CURRENT IN AMPERES
PACKAGING CODE
Packaging Code
BK
BK1
BK8
Description
100 pieces of fuses packed into a cardboard carton
1,000 pieces of fuses packed into a cardboard carton
8,000 pieces of fuses packed into a cardboard carton
OPTION CODE
Option Code
B
V
-R
Description
Board Washable - Hermetically sealed to withstand aqueous cleaning
Axial leads - copper tinned wire with nickel plated brass overcaps
RoHS compliant version
Visit us on the web at:
www.cooperbussmann.com
OC-2545 3/07
© Cooper Electronic
Technologies 2007
North America
Cooper Electronic Technologies Cooper Bussmann
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Suite F
St. Louis, MO 63178-4460
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Tel: 1-636-394-2877
Tel: 1-561-998-4100
Fax: 1-800-544-2570
Fax: 1-561-241-6640
Toll Free: 1-888-414-2645
Europe
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Avda. Santa Eulalia, 290
Burton-on-the-Wolds
08223
Leicestershire • LE12 5TH UK
Terrassa, (Barcelona), Spain
Tel: +44 (0) 1509 882 737
Tel: +34 937 362 812
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+34 937 362 813
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#06-01 Pacific Tech Centre
Singapore 159303
Tel: +65 278 6151
Fax: +65 270 4160
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