© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Axial Lead / Application Specific Varistors > MA Series
Description
The MA Series of transient surge suppressors are axial
lead Metal Oxide Varistors (MOVs) for use in a wide
variety of board level industrial and commercial electronic
equipment. They are intended to protect components and
signal/data lines from low energy transients where the
small axial lead package is required.
The MA Series is offered with standard ('S' suffix) or
tightened ('B' suffix) clamping voltage.
See MA Series Device Ratings and Specifications Table for
part number and brand information.
Features
• Lead–free, Halogen-
Free and RoHS
compliant.
• 3mm diameter disc size
• Small axial lead package
• Wide operating voltage
range:
V
M(AC)RMS
9V to 264V
V
M(DC)
13V to 365V
• Available in tape and
reel or bulk packaging
• No derating up to
85ºC ambient
• New black epoxy offers
improved performance
for high temperature
Lead-free wave
soldering process.
Absolute Maximum Ratings
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Continuous MA Series Units
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
) 9 to 264 V
DC Voltage Range (V
M(DC)
) 13 to 365 V
Transient:
Peak Pulse Current (I
TM
)
For 8/20µs Current Wave(See Figure 2) 40 to 100 A
Single-Pulse Energy Range
For 2ms Current Square Wave (W
TM
) 0.06 to 1.7 J
Operating Ambient Temperature Range (T
A
) -55 to +85 °C
Storage Temperature Range (T
STG
) -55 to +125 °C
Temperature Coefficient (αV) of Clamping Voltage (V
C
) at Specified Test Current <0.01 %/°C
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
1000 V
COATING Insulation Resistance 1000 MΩ
• For ratings of individual members of a series, see Device Ratings and Specifications chart
MA Varistor Series
Agency Approvals
Agency Agency File Number
None
RoHS
Additional Information
Datasheet
Samples
Resources
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
Metal-Oxide Varistors (MOVs)
Axial Lead / Application Specific Varistors > MA Series
MA Series Ratings & Specifications
Part
Number
Brand
(mm)
Maximum Rating (85°C) Specifications (25°C)
Continuous Transient
Varistor Voltage at 1mA
DC Test Current
Max Clamping
Volt V
C
at 2.0A
(8/20µs)
Typical
Capacitance
V
RMS
V
DC
Energy
(10/1000µs)
Peak
Current
(8/20µs)
V
M(AC)
V
M(DC)
W
TM
I
TM
Min V
N(DC)
Max V
C
f = 1MHz
(V) (V) (J) (A) (V) (V) (V) (A) (pF)
V18MA1A
V18MA1B
V18MA1S
18A
18B
18S
9
10
10
13
14
14
0.06
0.07
0.06
40
40
40
14
15
15
18
18
18
23
21
21
49
44
49
550
550
550
V22MA1A
V22MA1B
V22MA1S
22A
22B
22S
10
14
14
15
18
18
0.09
0.10
0.09
40
40
40
16
19
19
22
22
22
28
26
26
55
51
55
410
410
410
V27MA1A
V27MA1B
V27MA1S
27A
27B
27S
13
17
17
19
22
22
0.10
0.11
0.10
40
40
40
21
24
24
27
27
27
34
31
31
67
59
67
370
370
370
V33MA1A
V33MA1B
V33MA1S
33A
33B
33S
18
20
20
23
26
26
0.13
0.15
0.14
40
40
40
26
29.5
29.5
33
33
33
40
36.5
36.5
73
67
73
300
300
300
V39MA2A
V39MA2B
V39MA2S
39A
39B
39S
22
25
25
28
31
31
0.16
0.18
0.17
40
40
40
31
35
35
39
39
39
47
43
43
86
79
86
250
250
250
V47MA2A
V47MA2B
V47MA2S
47A
47B
47S
27
30
30
34
38
38
0.19
0.21
0.19
40
40
40
37
42
42
47
47
47
57
52
52
99
90
99
210
210
210
V56MA2A
V56MA2B
V56MA2S
56A
56B
56S
32
35
35
40
45
45
0.23
0.25
0.23
40
40
40
44
50
50
56
56
56
68
62
62
117
108
117
180
180
180
V68MA3A
V68MA3B
V68MA3S
68A
68B
68S
38
40
40
48
56
56
0.26
0.30
0.27
40
40
40
54
61
61
68
68
68
82
75
75
138
127
138
150
150
150
V82MA3A
V82MA3B
V82MA3S
82A
82B
82S
45
50
50
60
66
66
0.33
0.37
0.34
40
40
40
65
73
73
82
82
82
99
91
91
163
150
163
120
120
120
V100MA4A
V100MA4B
V100MA4S
100
101
102
57
60
60
72
81
81
0.40
0.45
0.42
40
40
40
80
90
90
100
100
100
120
110
110
200
185
200
100
100
100
V120MA1A
V120MA2B
V120MA2S
120
121
122
72
75
75
97
101
101
0.40
0.50
0.46
100
100
100
102
108
108
120
120
120
138
132
132
220
205
220
40
40
40
V150MA1A
V150MA2B
150
151
88
92
121
127
0.50
0.60
100
100
127
135
150
150
173
165
255
240
32
32
V180MA1A
V180MA3B
180
181
105
110
144
152
0.60
0.70
100
100
153
162
180
180
207
198
310
290
27
27
V220MA2A
V220MA4B
220
221
132
138
181
191
0.80
0.90
100
100
187
198
220
220
253
242
380
360
21
21
V270MA2A
V270MA4B
270
271
163
171
224
235
0.90
1. 0 0
100
100
229
243
270
270
311
297
460
440
17
17
V330MA2A
V330MA5B
330
331
188
200
257
2 74
1. 0 0
1. 10
100
100
280
297
330
330
380
363
570
540
14
14
V390MA3A
V390MA6B
390
391
234
242
322
334
1.20
1.30
100
100
331
351
390
390
449
429
670
640
12
12
V430MA3A
V430MA7B
430
431
253
264
349
365
1.50
1.70
100
100
365
387
430
430
495
473
74 0
700
11
11
NOTE: Average power dissipation of transients not to exceed 200mW.