LITTELFUSE MINIATURE FUSEHOLDERS User Manual
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Varistor Products
2
VARISTOR
PRODUCTS
Low Profile
RA V aristor Series
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.
See RA Series Device Ratings and Specifications table for part number
and brand information.
Features
• Low Profile Outline with Precise Seating Plane
• No Derating up to 125oC Ambient
• Wide Operating Voltage Range
V
M(AC)RMS
.....................................4V to 275V
V
M(DC
)........................................5.5V to 369V
• High Energy Absorption Capability W TM .............up to 140J
• 3 Model Sizes Available . ........RA8, RA16, and RA22
• In-Line Leads
AGENCY APPROV ALS: Recognized under the components program of
Underwriters Laboratories. Certified by CSA.
AGENCY FILE NUMBERS: UL E75961, E56529, E135010;
CSA LR91788.
®
®
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Varistor Products
RA V aristor Series
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
). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 275 10to 275 4 to 275 V
DC Voltage Range (V
M(DC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 to 369 14 to 369 18 to 369 V
Transient:
Peak Pulse Current (ITM)
For 8/20µs Current Wave (See Figure 2).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 to1200 1000 to 4500 2000 to 6500 A
Single Pulse Energy Range (
Note 1
)
For 10/1000µs Current Wave (WTM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4 to 23 3.5 to 75 70 to 160 J
Operating Ambient Temperature Range (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125 -55 to -125 -55 to -125
O
C
Storage Temperature Range (T
STG
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 150 -55 to 150 -55 to 150
O
C
Temperature Coefficient (αV) of Clamping Voltage
(VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 <0.01 <0.01 %/OC
Hi-Pot Encapsulation (Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for
one minute per MIL-STD 202, Method 301)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5000 5000 5000 V
Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 1000 1000 MΩ
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.
Device Ratings and Specifications (Note 1)
RA8 SERIES RA16 SERIES RA22 SERIES UNITS
Low Profile
PART
NUMBER BRAND
MAXIMUM RATINGS (125
o
C) SPECIFICATIONS (25oC)
CONTINUOUS TRANSIENT
VARISTOR VOLTAGE AT
1mA DC TEST
CURRENT
MAX CLAMPING
VOLTAGE V
C
AT
TEST CURRENT
(8/20µs)
TYPICAL
CAPACI-
TANCEV
RMS
V
DC
ENERGY
(10/1000µs)
PEAK
CURRENT
(8/20µs)
V
M(AC)VM(DC)
W
TM
I
TM
MIN V
N(DC)
MAX V
C
I
P
f = 1MHz
(V) (V) (J) (A) (V) (V) (V) (V) (A) (pF)
† RA8 SERIES
V8RA8 8R 4 5.5 0.4 150 6 8.2 11.2 22 5 3000
V12RA8 12R 6 8 0.6 150 9 12 16 34 5 2500
V18RA8 18R 10 14 0.8 250 14.4 18 21.6 42 5 2000
V22RA8 22R 14 18
(Note 3)10(Note 2)
250 18.7 22 26 47 5 1600
V27RA8 27R 17 22 1.0 250 23 27 31.1 57 5 1300
V33RA8 33R 20 26 1.2 250 29.5 33 36.5 68 5 1100
V39RA8 39R 25 31 1.5 250 35 39 43 79 5 900
V47RA8 47R 30 38 1.8 250 42 47 52 92 5 800
V56RA8 56R 35 45 2.3 250 50 56 62 107 5 700
V68RA8 68R 40 56 3.0 250 61 68 75 127 5 600
V82RA8 82R 50 66 4.0 1200 74 82 91 135 10 500
V100RA8 100R 60 81 5.0 1200 90 100 110 165 10 400
V120RA8 120R 75 102 6.0 1200 108 120 132 205 10 300
V150RA8 150R 95 127 8.0 1200 135 150 165 250 10 250
V180RA8 180R 115 153 10.0 1200 162 180 198 295 10 200
V200RA8 200R 130 175 11.0 1200 184 200 228 340 10 180
†
V220RA8 220R 140 180 12.0 1200 198 220 242 360 10 160
†
V240RA8 240R 150 200 13.0 1200 212 240 268 395 10 150
† V270RA8 270R 175 225 15.0 1200 247 270 303 455 10 130
†
V360RA8 360R 230 300 20.0 1200 324 360 396 595 10 100
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Varistor Products
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VARISTOR
PRODUCTS
Low Profile
RA V aristor Series
Device Ratings and Specifications (Note 1) (Continued)
†
V390RA8 390R 250 330 21.0 1200 354 390 429 650 10 90
†
V430RA8 430R 275 369 23.0 1200 389 430 473 710 10 80
†
RA16 SERIES
V18RA16 18R16 10 14 3.5 1000 14.4 18 21.6 39 10 11000
V22RA16 22R16 14 18
(Note 3)50(Note 2)
1000 18.7 22 26 43 10 9000
V27RA16 27R16 17 22 5.0 1000 23 27 31.1 53 10 7000
V33RA16 33R16 20 26 6.0 1000 29.5 33 36.5 64 10 6000
V39RA16 39R16 25 31 7.2 1000 35 39 43 76 10 5000
V47RA16 47R16 30 38 8.8 1000 42 47 52 89 10 4500
V56RA16 56R16 35 45 10.0 1000 50 56 62 103 10 3900
V68RA16 68R16 40 56 13.0 1000 61 68 75 123 10 3300
V82RA16 82R16 50 66 15.0 4500 74 82 91 145 50 2500
V100RA16 100R16 60 81 20.0 4500 90 100 110 175 50 2000
V120RA16 120R16 75 102 22.0 4500 108 120 132 205 50 1700
V150RA16 150R16 95 127 30.0 4500 135 150 165 255 50 1400
V180RA16 180R16 115 153 35.0 4500 162 180 198 300 50 1100
†
V200RA16 200R16 130 175 38.0 4500 184 200 228 340 50 1000
† V220RA16 220R16 140 180 42.0 4500 198 220 242 360 50 900
†
V240RA16 240R16 150 200 45.0 4500 212 240 268 395 50 800
†
V270RA16 270R16 175 225 55.0 4500 247 270 303 455 50 700
†
V360RA16 360R16 230 300 70.0 4500 324 360 396 595 50 550
†
V390RA16 390R16 250 330 72.0 4500 354 390 429 650 50 500
†
V430RA16 430R16 275 369 75.0 4500 389 430 473 710 50 450
†
RA22 SERIES
V24RA22 24R22 14 18
(Note 3)
100.0
(Note 2)
2000 19.2 24
(Note 4)
26 43 20 18000
V36RA22 36R22 23 31 160.0
(Note 2)
2000 32 36
(Note 4)
40 63 20 12000
†
V200RA22 200R22 130 175 70.0 6500 184 200 228 340 100 1900
†
V240RA22 240R22 150 200 80.0 6500 212 240 268 395 100 1600
†
V270RA22 270R22 175 225 90.0 6500 247 270 303 455 100 1400
†
V390RA22 390R22 250 330 130.0 6500 354 390 429 650 100 1000
†
V430RA22 430R22 275 369 140.0 6500 389 430 473 710 100 900
NOTES:
1. A verage power dissipation of transients not to exceed 0.25W for RA8 Series, 0.60W for RA16 Series, or 1.0W for RA22 Series.
2. Energy ratings for impulse duration of 30ms minimum to one half of peak current value.
3. Also rated to withstand 24V for 5 minutes.
4. 10mA DC Test Current.
†
Under UL File No. E75961 as a recognized component. CSA approved File No. LR91788.
PART
NUMBER BRAND
MAXIMUM RATINGS (125
o
C) SPECIFICATIONS (25oC)
CONTINUOUS TRANSIENT
VARISTOR VOLTAGE AT
1mA DC TEST
CURRENT
MAX CLAMPING
VOLTAGE V
C
AT
TEST CURRENT
(8/20µs)
TYPICAL
CAPACI-
TANCEV
RMS
V
DC
ENERGY
(10/1000µs)
PEAK
CURRENT
(8/20µs)
V
M(AC)VM(DC)
W
TM
I
TM
MIN V
N(DC)
MAX V
C
I
P
f = 1MHz
(V) (V) (J) (A) (V) (V) (V) (V) (A) (pF)
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