Littelfuse MA User Manual

Varistor Products

Axial Lead / Application Specifi c Varistors > MA Series

MA Varistor Series

Agency Approvals

Agency Agency File Number

None

RoHS

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' suffi x) or
tightened ('B' suffi x) clamping voltage.

See MA Series Device Ratings and Specifi cations Table for
part number and brand information.

Features

• 3mm diameter disc size

• Small axial lead package

• Wide operating voltage
range:
V
V

9V to 264V

M(AC)RMS

13V to 365V

M(DC)

• No derating up to
85ºC ambient

• New black epoxy offers
improved performance
for high temperature
Lead-free wave
soldering process.

• Available in tape and
reel or bulk packaging

Absolute Maximum Ratings

• For ratings of individual members of a series, see Device Ratings and Specifi cations chart

Continuous MA Series Units

Steady State Applied Voltage:

AC Voltage Range (V

DC Voltage Range (V

Transient:

Peak Pulse Current (ITM)

For 8/20μs Current Wave(See Figure 2) 40 to 100 A

Single-Pulse Energy Range

For 2ms Current Square Wave (W

Operating Ambient Temperature Range (T

Storage Temperature Range (T

Temperature Coefficient (V) of Clamping Voltage (V

Hi-Pot Encapsulation (COATING Isolation Voltage Capability)

Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)

COATING Insulation Resistance 1000 M Ω

) -55 to +125 °C

STG

) 9 to 264 V

M(AC)RMS

) 13 to 365 V

M(DC)

) 0.06 to 1.7 J

) -55 to +85 °C

A

TM

) at Specified Test Current <0.01 %/°C

C

1000 V

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
specifi cation is not implied.

MA Series

© 2013 Littelfuse, Inc.
Specifi cations are subject to change without notice.
Please refer to www.littelfuse.com/series/ma.html for current information.

187

Revised: October 9, 2013

MA Varistor Series

MA Series Ratings & Specifi cations

Maximum Rating (85°C) Specifi cations (25°C)

Continuous Transient

Part

Number

V18MA1A
V18MA1B
V18MA1S

V22MA1A
V22MA1B
V22MA1S

V27MA1A
V27MA1B
V27MA1S

V33MA1A
V33MA1B
V33MA1S

V39MA2A
V39MA2B
V39MA2S

V47MA2A
V47MA2B
V47MA2S

V56MA2A
V56MA2B
V56MA2S

V68MA3A
V68MA3B
V68MA3S

V82MA3A
V82MA3B
V82MA3S

V100MA4A
V100MA4B
V100MA4S

V120MA1A
V120MA2B
V120MA2S

V150MA1A
V150MA2B

V180MA1A
V180MA3B

V220MA2A
V220MA4B

V270MA2A
V270MA4B

V330MA2A
V330MA5B

V390MA3A
V390MA6B

V430MA3A
V430MA7B

Brand

(mm)

18A
18B
18S

22A
22B
22S

27A
27B
27S

33A
33B
33S

39A
39B
39S

47A
47B
47S

56A
56B
56S

68A
68B
68S

82A
82B
82S

100

101

102

120
121
122

150
151

180
181

220
221

270
271

330
331

390
391

430
431

V

RMS

V

M(AC)

(V) (V) (J) (A) (V) (V) (V) (A) (pF)

9
10
10

10
14
14

13
17
17

18
20
20

22
25
25

27
30
30

32
35
35

38
40
40

45
50
50

57
60
60

72
75
75

88
92

105
110

132
138

163
171

188
200

234
242

253
264

Varistor Products

Axial Lead / Application Specifi c Varistors > MA Series

23
21
21

28
26
26

34
31
31

40

47
43
43

57
52
52

68
62
62

82
75
75

99
91
91

120
110
110

138
132
132

173
165

207
198

253
242

311
297

380
363

449
429

495
473

Max Clamping

Volt V C at 2.0A

(8/20μs)

117
108
117

138
127
138

163
150
163

200
185
200

220
205
220

255
240

310
290

380
360

460
440

570
540

670
640

74 0
700

V

V

M(DC)

13
14
14

15
18
18

19
22
22

23
26
26

28
31
31

34
38
38

40
45
45

48
56
56

60
66
66

72
81
81

97
101
101

121
127

144
152

181
191

224
235

257
274

322
334

349
365

DC

Energy

(10/1000μs)

Peak

Current

(8/20μs)

WTM I

0.06

0.07

0.06

0.09

0.10

0.09

0.10

0.11

0.10

0.13

0.15

0.14

0.16

0.18

0.17

0.19

0.21

0.19

0.23

0.25

0.23

0.26

0.30

0.27

0.33

0.37

0.34

0.40

0.45

0.42

0.40

0.50

0.46

0.50

0.60

0.60

0.70

0.80

0.90

0.90

1. 0 0

1. 0 0

1. 10

1.20

1.30

1.50

1.70

40
40
40

40
40
40

40
40
40

40
40
40

40
40
40

40
40
40

40
40
40

40
40
40

40
40
40

40
40
40

100
100
100

100
100

100
100

100
100

100
100

100
100

100
100

100
100

Varistor Voltage at 1mA

DC Test Current

Min V

TM

14
15
15

16
19
19

21
24
24

26

29.5

29.5

31
35
35

37
42
42

44
50
50

54
61
61

65
73
73

80
90
90

102
108
108

127
135

153
162

187
198

229
243

280
297

331
351

365
387

N(DC)

18
18
18

22
22
22

27
27
27

33
33
33

39
39
39

47
47
47

56
56
56

68
68
68

82
82
82

100
100
100

120
120
120

150
150

180
180

220
220

270
270

330
330

390
390

430
430

Max VC f = 1MHz

36.5

36.5

49
44
49

55
51
55

67
59
67

73
67
73

86
79
86

99
90
99

Typical

Capacitance

550
550
550

410
410
410

370
370
370

300
300
300

250
250
250

210
210
210

180
180
180

150
150
150

120
120
120

100
100
100

40
40
40

32
32

27
27

21
21

17
17

14
14

12
12

11
11

NOTE: Average power dissipation of transients not to exceed 200mW.

MA Varistor Series

188

Revised: October 9, 2013

Please refer to www.littelfuse.com/series/ma.html for current information.

Specifi cations are subject to change without notice.

© 2013 Littelfuse, Inc.