Varistor Products
Low Profile / Application Specific Varistors > RA Series
RoHS
RA Varistor Series
Description
The RA Series transient surge suppressors are varistors
(MOVs) supplied in a low-profile box that features a precise
seating plane to increase mechanical stability for secure
circuit-board mounting. This feature makes these devices
suitable for industrial applications critical to vibration. Their
construction permits operation up to 125ºC (ambient)
without derating.
The RA Series are available in voltage ratings up to 275V
V
M(AC)RMS
, and energy levels up to 140J. These varistors are
used in automotive, motor-control, telecommunication, and
military applications.
Agency Approvals
Agency
Agency File Number
See RA Series Device Ratings and Specifications Table for
part number and brand information.
Features
•
Lead–free/RoHS
compliant parts
available (add
suffix "x2749")
Low profile outline with
precise seating plane
No derating up to
125ºC ambient
In-line leads
•
Wide operating
voltage range:
V
M(AC)RMS
:
4 – 275V
V
M(DC):
5.5 – 369V
High energy absorption
capability W
TM
up to 140J
3 model sizes available
A8, RA16, and RA22
E320116
LR91788
•
•
•
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
•
•
Continuous
Steady State Applied Voltage:
AC Voltage Range (V
M(AC)RMS
)
DC Voltage Range (V
M(DC)
)
Transients:
Peak Pulse Current (I
TM
)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range (Note 1)
For 10/1000μs Current Wave (W
TM
)
Operating Ambient Temperature Range (T
A
)
Storage Temperature Range (T
STG
)
Temperature Coefficient (a ) of Clamping Voltage (V
C
) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Delectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
V
RA8 Series
4 to 275
5.5 to 369
RA16 Series RA22 Series
10 to 275
14 to 369
4 to 275
18 to 369
Units
V
V
100 to 1200
0.4 to 23
-55 to +125
-55 to +150
<0.01
5000
1000
1000 to 4500
3.5 to 75
-55 to +125
-55 to +150
<0.01
5000
1000
2000 to 6500
70 to 160
-55 to +125
-55 to +150
<0.01
5000
1000
A
J
ºC
ºC
%/ºC
V
MΩ
COATING Insulation Resistance
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.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
193
Revision: November 11, 2009
RA Varistor Series
RA Series
Low Profile / Application Specific Varistors > RA Series
Varistor Products
RA Series Ratings & Specifications
Maximum Rating (125°C)
Continuous
Part
Number
Brand
V
RMS
V
M(AC)
(mm)
†
RA8 Series
V8RA8
V12RA8
V18RA8
V22RA8
V27RA8
V33RA8
V39RA8
V47RA8
V56RA8
V68RA8
V82RA8
V100RA8
V120RA8
V150RA8
V180RA8
V200RA8
†
†
†
†
†
†
V220RA8
V240RA8
V270RA8
V360RA8
V390RA8
V430RA8
8R
12R
18R
22R
27R
33R
39R
47R
56R
68R
82R
100R
120R
150R
180R
200R
220R
240R
270R
360R
390R
430R
4
6
10
14
17
20
25
30
35
40
50
60
75
95
115
130
140
150
175
230
250
275
5.5
8
14
18
(Note 3)
22
26
31
38
45
56
66
81
102
127
153
175
180
200
225
300
330
369
0.4
0.6
0.8
10
(Note 2)
1.0
1.2
1.5
1.8
2.3
3.0
4.0
5.0
6.0
8.0
10.0
11.0
12.0
13.0
15.0
20.0
21.0
23.0
150
150
250
250
250
250
250
250
250
250
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
1200
6
9
14.4
18.7
23
29.5
35
42
50
61
74
90
108
135
162
184
198
212
247
324
354
389
8.2
12
18
22
27
33
39
47
56
68
82
100
120
150
180
200
220
240
270
360
390
430
11.2
16
21.6
26
31.1
36.5
43
52
62
75
91
110
132
165
198
228
242
268
303
396
429
473
22
34
42
47
57
68
79
92
107
127
135
165
205
250
295
340
360
395
455
595
650
710
5
5
5
5
5
5
5
5
5
5
10
10
10
10
10
10
10
10
10
10
10
10
3000
2500
2000
1600
1300
1100
900
800
700
600
500
400
300
250
200
180
160
150
130
100
90
80
(V)
V
DC
V
M(DC)
(V)
Transient
Energy
(10/1000μs)
W
TM
(J)
Peak
Current
(8/20μs)
I
TM
(A)
Varistor Voltage at 1mA
DC Test Current
Min
(V)
V
N(DC)
(V)
Max
(V)
Specifications (25°C)
Max Clamping
Volt V
C
at 2.0A
(8/20μs)
V
C
(V)
I
p
(A)
Typical
Capacitance
f = 1MHz
(pF)
†
RA16 Series
V18RA16
V22RA16
V27RA16
V33RA16
V39RA16
V47RA16
V56RA16
V68RA16
V82RA16
V100RA16
V120RA16
V150RA16
V180RA16
RA Varistor Series
18R16
22R16
27R16
33R16
39R16
47R16
56R16
68R16
82R16
100R16
120R16
150R16
180R16
10
14
17
20
25
30
35
40
50
60
75
95
115
14
18 (Note
3)
22
26
31
38
45
56
66
81
102
127
153
3.5
50 (Note
2)
5.0
6.0
7
.2
8.8
10.0
13.0
15.0
20.0
22.0
30.0
35.0
1000
1000
1000
1000
1000
1000
1000
1000
4500
4500
4500
4500
4500
194
14.4
18.7
23
29.5
35
42
50
61
74
90
108
135
162
18
22
27
33
39
47
56
68
82
100
120
150
180
21.6
26
31.1
36.5
43
52
62
75
91
110
132
165
198
39
43
53
64
76
89
103
123
145
175
205
255
300
10
10
10
10
10
10
10
10
50
50
50
50
50
11000
9000
7000
6000
5000
4500
3900
3300
2500
2000
1700
1400
1100
©2009 Littelfuse, Inc.
Revision: November 11, 2009
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
Varistor Products
Low Profile / Application Specific Varistors > RA Series
RA Series Ratings & Specifications
Maximum Rating (125°C)
Continuous
Part
Number
Brand
V
RMS
V
M(AC)
(mm)
V200RA16
†
†
†
†
†
†
†
V220RA16
V240RA16
V270RA16
V360RA16
V390RA16
V430RA16
RA22 Series
V24RA22
V36RA22
†
†
†
†
†
V200RA22
V240RA22
V270RA22
V390RA22
V430RA22
1.
2.
3.
4.
†
Specifications (25°C)
Varistor Voltage at 1mA
DC Test Current
Min
(V)
184
198
212
247
324
354
389
V
N(DC)
(V)
200
220
240
270
360
390
430
Max
(V)
228
242
268
303
396
429
473
Max Clamping
Volt V
C
at 2.0A
(8/20μs)
V
C
(V)
340
360
395
455
595
650
710
I
p
(A)
50
50
50
50
50
50
50
Typical
Capacitance
f = 1MHz
(pF)
1000
900
800
700
550
500
450
Transient
Energy
(10/1000μs)
W
TM
(J)
38.0
42.0
45.0
55.0
70.0
72.0
75.0
Peak
Current
(8/20μs)
I
TM
(A)
4500
4500
4500
4500
4500
4500
4500
V
DC
V
M(DC)
(V)
175
180
200
225
300
330
369
(V)
130
140
150
175
230
250
275
200R16
220R16
240R16
270R16
360R16
390R16
430R16
24R22
36R22
200R22
240R22
270R22
390R22
430R22
14
23
130
150
175
250
275
18
(Note 3)
31
175
200
225
330
369
100.0
(Note 2)
160.0
(Note 2)
70.0
80.0
90.0
130.0
140.0
2000
2000
6500
6500
6500
6500
6500
19.2
32
184
212
247
354
389
24
(Note 4)
36
(Note 4)
200
240
270
390
430
26
40
228
268
303
429
473
43
63
340
395
455
650
710
20
20
100
100
100
100
100
18000
12000
1900
1600
1400
1000
900
NOTES:
Average power dissipation of transients not to exceed 0.25W for RA8 Series, 0.60W for RA16 Series, or 1.0W for RA22 Series.
Energy ratings for impulse duration of 30ms minimum to one half of peak current value.
Also rated to withstand 24V for 5 minutes.
10mA DC Test Current.
Under UL File No. E320116 as a recognized component. CSA approved File No. LR91788.
Power Dissipation Ratings
Peak Pulse Current Test Waveform
100
90
100
PERCENT OF RATED VALUE
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100
110
120
130
140 150
50
10
TIME
T
2
Figure 1
AMBIENT TEMPERATURE (
o
C)
T
1
Figure 2
Should transients occur in rapid succession, the average power
dissipation required is 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 aver-
age power dissipation.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
195
Revision: November 11, 2009
0
1
= Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T
1
= Rise Time = 1.25 x T
T
2
= Decay Time
Example
- For an 8/20
μs
Current Waveform:
8μs = T
1
= Rise Time
20μs = T
2
= Decay Time
RA Varistor Series
RA Series
O
1
T
Low Profile / Application Specific Varistors > RA Series
Varistor Products
Maximum Clamping Voltage for 8mm Parts
V8RA8 - V68RA8
600
500
400
300
MAXIMUM PEAK VOLTS (V)
200
MAXIMUM CLAMPING VOLTAGE
8 T
O
68V
N(DC)
RATING
T
A
= -55
o
C TO 125
o
C
Repetitive Surge Capability for 8mm Parts
V8RA8 - V12RA8
200
100
50
SURGE CURRENT (A)
20
10
5
2
1
0.5
0.2
INDEFINITE
1
2
10
10
2
10
3
10
4
10
5 6
10
V8RA8 - V12RA8
100
90
80
70
60
50
40
V68RA8
V56RA8
V47RA8
V39RA8
V33RA8
V27RA8
30 V22RA8
V18RA8
20
V12RA8
V8RA8
10
10
-2
10
-3
Figure 3
10
-1
10
0
10
1
10
2
10
3
20
100
PEAK AMPERES (A)
Figure 5
V18RA8 - V68RA8
500
1,000
IMPULSE DURATION (μs)
10,000
V82RA8 - V430RA8
4,000
3,000
2,000
( )
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430V
N(DC)
RATING
T
A
= -55
o
C TO 125
o
C
200
100
SURGE CURRENT (A)
50
20
10
5
2
1
V82RA8
1
2
10
10
2
10
3
10
4 5
10
6
10
V18RA8 - V68RA8
1,000
900
800
700
600
500
V360RA8
400
V270RA8
300
200
V180RA8
V150RA8
V120RA8
V100RA8
100
10
-3
10
-2
V430RA8
V390RA8
V240RA8
V220RA8
V200RA8
INDEFINITE
0.5
10
3
10
10
-1
Figure 4
10
0
10
1
10
2
PEAK AMPERES (A)
0.2
20
100
Figure 6
V82RA8 - V430RA8
2,000
1,000
500
SURGE CURRENT (A)
200
100
50
20
10
5
2
1
20
100
INDEFINITE
1,000
IMPULSE DURATION (μs)
10,000
1
2
10
10
2
V82RA8 - V430RA8
10
3
10
4
10
5
10
6
1,000
IMPULSE DURATION (μs)
10,000
Figure 7
RA Varistor Series
196
Revision: November 11, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
Varistor Products
Low Profile / Application Specific Varistors > RA Series
Maximum Clamping Voltage for 16mm Parts
V18RA16 - V68RA16
600
500
400
300
MAXIMUM PEAK VOLTS (V)
200
MAXIMUM CLAMPING VOLTAGE
18 TO 68V
N(DC)
RATING
T
A
= -55
o
C TO 125
o
C
Repetitive Surge Capability for 16mm Parts
V18RA16 - V68RA16
1,000
500
2
10
1
SURGE CURRENT (A)
200 10
2
100
50
20
10
5
2
1
20
100
INDEFINITE
10
3
10
4
10
5
10
6
V18RA16 - V68RA16
100
90
80
70
60
50
40
V68RA16
V56RA16
V47RA16
V39RA16
V33RA16
V27RA16
30 V22RA16
V18RA16
20
10
-3
10
-2
Figure 8
V82RA16 - V430RA16
4,000
3,000
2,000
MAXIMUM PEAK VOLTS (V)
10
-1
10
0
10
1
PEAK AMPERES (A)
10
2
10
3
1,000
IMPULSE DURATION (μs)
10,000
Figure 10
V82RA16 - V430RA16
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430V
N(DC)
RATING
T
A
= -55
o
C TO 125
o
C
SURGE CURRENT (A)
V240RA16
V220RA8
V200RA8
5,000
2,000
1,000
500
200
100
50
20
10
5
V82RA16
2
20
2
10
1
V82RA16 - V430RA16
10
2 3
10
10
4
10
5
10
6
1,000
900
800
700
600
500
V360RA16
400
V270RA16
300
200
V180RA16
V150RA16
V120RA16
V100RA16
100
10
-3
10
-2
V430RA16
V390RA16
INDEFINITE
10
-1
Figure 9
10
0
10
1
10
2
PEAK AMPERES (A)
10
3
10
4
100
1,000
10,000
Figure 11
IMPULSE DURATION (μs)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
197
Revision: November 11, 2009
RA Varistor Series
RA Series
GD32 MCU
京公网安备 11010802033920号
EEWORLD
