Metal-Oxide Varistors. V68MA3B Datasheet

V68MA3B Varistors. Datasheet pdf. Equivalent

V68MA3B Datasheet
Recommendation V68MA3B Datasheet
Part V68MA3B
Description Metal-Oxide Varistors
Feature V68MA3B; Metal-Oxide Varistors (MOVs) Axial Lead / Application Specific Varistors > MA Series MA Varistor Ser.
Manufacture Littelfuse
Datasheet
Download V68MA3B Datasheet




Littelfuse V68MA3B
Metal-Oxide Varistors (MOVs)
Axial Lead / Application Specific Varistors > MA Series
MA Varistor Series
RoHS
Agency Approvals
Agency
Agency File Number
None
Additional Information
Datasheet
Resources
Samples
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:
VM(AC)RMS
VM(DC)
9V to 264V
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
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
Steady State Applied Voltage:
Transient:
AC Voltage Range (VM(AC)RMS)
DC Voltage Range (VM(DC))
Peak Pulse Current (ITM)
For 8/20µs Current Wave(See Figure 2)
Single-Pulse Energy Range
For 2ms Current Square Wave (WTM)
Operating Ambient Temperature Range (TA)
Storage Temperature Range (TSTG)
Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current
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
MA Series
9 to 264
13 to 365
40 to 100
0.06 to 1.7
-55 to +85
-55 to +125
<0.01
1000
1000
Units
V
V
A
J
°C
°C
%/°C
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 specification is not implied.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17



Littelfuse V68MA3B
Metal-Oxide Varistors (MOVs)
Axial Lead / Application Specific Varistors > MA Series
MA Series Ratings & Specifications
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
Maximum Rating (85°C)
Continuous
Transient
VRMS
VDC
Energy
(10/1000µs)
Peak
Current
(8/20µs)
VM(AC)
(V)
9
10
10
VM(DC)
(V)
13
14
14
WTM
(J)
0.06
0.07
0.06
ITM
(A)
40
40
40
10 15
14 18
14 18
0.09
0.10
0.09
40
40
40
13 19
17 22
17 22
0.10
0.11
0.10
40
40
40
18 23
20 26
20 26
0.13
0.15
0.14
40
40
40
22 28
25 31
25 31
0.16
0.18
0.17
40
40
40
27 34
30 38
30 38
0.19
0.21
0.19
40
40
40
32 40
35 45
35 45
0.23
0.25
0.23
40
40
40
38 48
40 56
40 56
0.26
0.30
0.27
40
40
40
45 60
50 66
50 66
0.33
0.37
0.34
40
40
40
57 72
60 81
60 81
0.40
0.45
0.42
40
40
40
72 97
75 101
75 101
0.40
0.50
0.46
100
100
100
88 121
92 127
0.50
0.60
100
100
105 144
110 152
0.60
0.70
100
100
132 181
138 191
0.80
0.90
100
100
163 224
171 235
0.90
1.00
100
100
188 257
200 274
1.00
1.10
100
100
234 322
242 334
1.20
1.30
100
100
253 349
264 365
1.50
1.70
100
100
NOTE: Average power dissipation of transients not to exceed 200mW.
Specifications (25°C)
Varistor Voltage at 1mA
DCTest Current
Max Clamping
Vol(t8V/2C 0aµts2).0A
Typical
Capacitance
Min
(V)
VN(DC)
(V)
Max
(V)
14 18 23
15 18 21
15 18 21
16 22 28
19 22 26
19 22 26
21 27 34
24 27 31
24 27 31
26 33 40
29.5 33 36.5
29.5 33 36.5
31 39 47
35 39 43
35 39 43
37 47 57
42 47 52
42 47 52
44 56 68
50 56 62
50 56 62
54 68 82
61 68 75
61 68 75
65 82 99
73 82 91
73 82 91
80 100 120
90 100 110
90 100 110
102 120 138
108 120 132
108 120 132
127 150 173
135 150 165
153 180 207
162 180 198
187 220 253
198 220 242
229 270 311
243 270 297
280 330 380
297 330 363
331 390 449
351 390 429
365 430 495
387 430 473
VC
(A)
49
44
49
55
51
55
67
59
67
73
67
73
86
79
86
99
90
99
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
740
700
f = 1MHz
(pF)
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
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17



Littelfuse V68MA3B
Metal-Oxide Varistors (MOVs)
Axial Lead / Application Specific Varistors > MA Series
Power Dissipation Ratings
Peak Pulse Current Test Waveform
100
90
80
70
60
50
40
30
20
10
0
-55 50 60 70 80 90 100 110 120 130 140 150
Figure 1
AMBIENT TEMPERATURE ( oC)
ShoFuIlGd UtrRanEs1i.enCtUs RoRccEuNrTin, ErNapEiRdGsYucAcNeDssPioOnW, tEhReDaEveRrAaTgIeNGpower
dissipation requCirUeRdViEs simply the energy (watt-seconds) per
pulse times the number of pulses per second. The power so
developed must be within the specifications shown on the
Device Ratings and Specifications table for the specific device.
Furthermore, the operating values need to be derated at high
temperatures as shown above. Because varistors can only
dissipate a relatively small amount of average power they are,
therefore, not suitable for repetitive applications that involve
substantial amounts of average power dissipation.
100
90
O1 = Virtu
T = Time
T1 = Virtu
T2 = Virtu
50
Example: F
8 s = T1 =
20 s = T2 =
10
O1 T
TIME
T1
T2
Figure 2
FIGURE 2. PEAK PULSE CURRENT TEST
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 µs Current Waveform:
8µs = T1 = Rise Time
20µs = T2 = Decay Time
Repetitive Surge Capability
V18MA - V100MA
50 1
2
20
10
10 102
5 103
2 104
DISC SIZE 3mm
V18MA1A - V100MA4B
10
5
106
1
0.5
INDEFINITE
0.2
0.1
20
100
1,000
10,000
Figure 3
IMPULSE DURATION (μs)
FIGURE 7. SURGE CURRENT RATING CURVES FOR V18MA
SERIES - V100MA SERIES
V120MA1A/S - V430MA3A
100
50 2
1
10
20
10 102
5
DISC SIZE 3mm
V120MA1A - V430MA7B
103
104
10105 6
2
1
0.5
INDEFINITE
0.2
0.1
20 100
1,000
10,000
IMPULSE DURATION (μs)
Figure 4
FIGURE 8. SURGE CURRENT RATING CURVES FOR
V120MA SERIES - V430MA SERIES
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
+/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not
prevent the device from continuing to function, and to provide ample protection.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17







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