Technical Data
2002
Effective
July
2017
Supersedes
June
2017
MDA
1/4” x 1 1/4” Time-delay ceramic tube fuses
Agency information
•
UL Listed Card: MDA
1/4
- 20 A (Guide JDYX, File E19180)
•
UL Recognized Card: MDA 25 - 30 A (Guide JDYX2, File
E19180)
•
CSA Certification Card: MDA
1/4
- 20
A
(Class No. 1422-01)
•
CSA Component Acceptance: MDA 25-30 A (Class No.
1422-30)
Environmental data
•
Product features
•
•
•
•
•
Time-delay
Optional axial leads available
1/4” x 1-1/4” (6.35 x 31.75 mm) physical size
Ceramic tube, nickel-plated brass endcap construction
UL Listed product meets standard 248-14
•
Shock: 1 A thru 30 A – MIL-STD-202, Method 213, Test
Condition J
Vibration: 1/4 A thru 30 A – MIL-STD-202, Method 204, Test
Condition C (Except 5 g, 500 Hz)
Ordering
•
Specify packaging, product and option code.
Rated Current
1/4 - 30 A
Electrical Characteristics
Amp Rating
Opening Time
100%
None
135%
60
minutes
Max.
200%
120
seconds
Max.
Specifications
Part
Number
MDA-1/4-R
MDA-1/2-R
MDA-3/4-R
MDA-1-R
MDA-1-1/2-R
MDA-2-R
MDA-2-1/2-R
MDA-3-R
MDA-4-R
MDA-5-R
MDA-6-R
MDA-7-R
MDA-8-R
MDA-10-R
MDA-12-R
MDA-15-R
MDA-20-R
MDA-25-R
MDA-30-R
Voltage Rating
Vac
Vdc
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
-
250
125
250
125
250
125
AC Interrupting
Rating* (A)
250 V 125 V
35
10000
35
10000
35
10000
35
10000
100
10000
100
10000
200
10000
200
10000
200
10000
200
10000
200
10000
200
10000
200
10000
200
10000
750
10000
750
10000
1500 10000
1500 10000
1500 10000
DC Interrupting
Rating (A) 125 V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
10000
10000
10000
Typical DC Cold
Resistance**
(Ω)
8.7
1.78
0.82
0.56
0.2565
0.17
0.068
0.0525
0.03575
0.0256
0.02035
0.0165
0.013
0.00925
0.00755
0.00565
0.004065
0.0031
0.002465
Typical
Typical Voltage
2
t†
AC
Drop‡
Melting
I
0.748
4.00
2.53
1.42
8.58
1.31
12.21
1.03
27.5
0.691
70.4
0.623
31.79
0.213
44.99
0.182
147.4
0.162
380.49
0.145
587.73
0.141
638.33
0.137
1038.4
0.134
1620.43
0.135
125.18
0.128
336.82
0.107
483.45
0.095
734.69
0.105
1096.7
0.110
*
Interrupting Ratings (Measured at 70% - 80% power factor on AC. The interrupting ratings for 25 A, 30 A 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)
Technical Data
2002
Effective
July
2017
MDA
1/4” x 1 1/4” Time-delay ceramic tube fuses
Time-Current Curves
(
7 A - 30 A)
Time-Current Curves
(
1/4 A - 6 1/4 A)
Dimensions - mm (in)
Drawing Not to Scale
38.10
(1.500)
32.82
(1.292)
38.10
(1.500)
6.76
(0.266)
DIA. OF LEADS
0.81
0–15 AMP:
(0.032)
1.02
20–30 AMP:
(0.040)
31.75
(1.250)
6.35
(0.250)
Packaging Code Pre x
BK-
Description
100 fuses packed into a cardboard carton
Packaging Code
Option Code
B
V
Description
Sealed to withstand aqueous cleaning (Board Washable)
Axial leads - copper tinned wire with nickel plated brass overcaps
Option Code
Life Support Policy: Eaton 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.
Eaton reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Eaton also
reserves the right to change or update, without notice, any technical information contained in this bulletin.
Eaton
Electronics Division
1000 Eaton Boulevard
Cleveland, OH 44122
United States
www.eaton.com/electronics
© 2017 Eaton
All Rights Reserved
Printed in USA
Publication No. 2002
BU-SB11875
July
2017
Eaton is a registered trademark.
All other trademarks are property
of their respective owners.
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