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V A R I S T O R P R O D U C T S

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 125o C (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 125o C 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 APPROVALS:Recognized under the components program of

Underwriters Laboratories.Certified by CSA.

AGENCY FILE NUMBERS:UL E75961, E56529, E135010;

CSA LR91788.

RA Varistor 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 27510to 275 4 to 275V DC Voltage Range (V M(DC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 to 36914 to 36918 to 369V

T ransient:

Peak Pulse Current (I TM)

For 8/20μs Current Wave (See Figure 2).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 to12001000 to 45002000 to 6500A Single Pulse Energy Range (Note 1)

For 10/1000μs Current Wave (W TM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4 to 23 3.5 to 7570 to 160J Operating Ambient Temperature Range (T A). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125-55 to -125-55 to -125O C Storage Temperature Range (T STG). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 150-55 to 150-55 to 150O C Temperature Coefficient (αV) of Clamping Voltage

(V C) at Specified Test Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01<0.01<0.01%/O C Hi-Pot Encapsulation (Isolation Voltage Capability)

(Dielectric must withstand indicated DC voltage for

one minute per MIL-STD 202, Method 301). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500050005000V Insulation Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100010001000M?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

PART

NUMBER BRAND

MAXIMUM RATINGS (125o C)SPECIFICATIONS (25o C)

CONTINUOUS TRANSIENT

VARISTOR VOLTAGE AT

1mA DC TEST

CURRENT

MAX CLAMPING

VOLTAGE V C AT

TEST CURRENT

(8/20μs)

TYPICAL

CAPACI-

TANCE 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 I P f = 1MHz (V)(V)(J)(A)(V)(V)(V)(V)(A)(pF)

?RA8 SERIES

V8RA88R4 5.50.415068.211.22253000 V12RA812R680.6150912163452500 V18RA818R10140.825014.41821.64252000

V22RA822R1418

(Note 3)

(Note 2)

25018.722264751600

V27RA827R1722 1.025*******.15751300 V33RA833R2026 1.225029.53336.56851100 V39RA839R2531 1.5250353943795900 V47RA847R3038 1.8250424752925800 V56RA856R3545 2.32505056621075700 V68RA868R4056 3.02506168751275600 V82RA882R5066 4.0120074829113510500 V100RA8100R6081 5.012009010011016510400 V120RA8120R75102 6.0120010812013220510300 V150RA8150R951278.0120013515016525010250 V180RA8180R11515310.0120016218019829510200 V200RA8200R13017511.0120018420022834010180?V220RA8220R14018012.0120019822024236010160?V240RA8240R15020013.0120021224026839510150?V270RA8270R17522515.0120024727030345510130?V360RA8360R23030020.0120032436039659510100

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V A R I S T O R P R O D U C T S

RA Varistor Series

Device Ratings and Specifications (Note 1)

(Continued)

?V390RA8390R 25033021.012003543904296501090?V430RA8430R

275

369

23.0

1200

389

430

473

710

RA16 SERIES V18RA1618R161014 3.5100014.41821.6391011000V22RA1622R161418(Note 3)50(Note 2)100018.7222643109000V27RA1627R161722 5.010********.153107000V33RA1633R162026 6.0100029.53336.564106000V39RA1639R1625317.2100035394376105000V47RA1647R1630388.8100042475289104500V56RA1656R16354510.01000505662103103900V68RA1668R16405613.01000616875123103300V82RA1682R16506615.04500748291145502500V100RA16100R16608120.0450090100110175502000V120RA16120R167510222.04500108120132205501700V150RA16150R169512730.04500135150165255501400V180RA16

180R1611515335.04500162180198300501100?V200RA16200R1613017538.04500184200228340501000?V220RA16220R1614018042.0450019822024236050900?V240RA16240R1615020045.0450021224026839550800?V270RA16270R1617522555.0450024727030345550700?V360RA16360R1623030070.0450032436039659550550?V390RA16390R1625033072.0450035439042965050500?V430RA16430R16

275

369

75.0

4500

389

430

473

710

450

RA22 SERIES V24RA2224R221418(Note 3)100.0 (Note 2)200019.224(Note 4)26432018000V36RA22

36R222331160.0(Note 2)20003236(Note 4)40632012000?V200RA22200R2213017570.065001842002283401001900?V240RA22240R2215020080.065002122402683951001600?V270RA22270R2217522590.065002472703034551001400?V390RA22390R22250330130.065003543904296501001000?

V430RA22430R22

275

369

140.0

6500

389

430

473

710

100

900

NOTES:

1.Average 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 (125o C)

SPECIFICATIONS (25o C)

CONTINUOUS

TRANSIENT VARISTOR VOLTAGE AT

1mA DC TEST CURRENT MAX CLAMPING VOLTAGE V C AT TEST CURRENT

(8/20μs)TYPICAL CAPACI-TANCE 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 I P f = 1MHz (V)(V)(J)(A)(V)(V)(V)(V)(A)(pF)

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RA Varistor Series

Power Dissipation Ratings

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 specifi-cations 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 in Figure 1.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.

FIGURE 1.CURRENT, ENERGY AND POWER DERA TING

CURVE

AMBIENT T EMPERA TURE (o C)

P E R C E N T O F R A T E D V A L U E

O P E R C E N T O F P E A K V A L U E

O 1 = Virtual Origin of Wave

T = Time From 10% to 90% of Peak T 1 = Virtual Front time = 1.25 ? t

T 2 = Virtual Time to Half Value (Impulse Duration)Example:For an 8/20μs Current Waveform:8μs = T 1 = Virtual Front Time

20μs = T 2 = Virtual Time to Half Value

FIGURE 2.PEAK PULSE CURRENT TEST WA VEFORM

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V A R I S T O R P R O D U C T S

RA Varistor Series

Transient V-I Characteristics Curves (Continued)

600500400300

200

100908070605040

3020M A X I M U M P E A K V O L T S (V )

FIGURE 3.CLAMPING VOL TAGE FOR V8RA8 - V68RA8

600500400300

200

100908070605040

3020

1010101010101010PEAK AMPERES (A)

M A X I M U M P E A K V O L T S (V )

FIGURE 4.CLAMPING VOL TAGE FOR V82RA8 - V430RA8

M A X I M U M P E A K V O L T S (V )

PEAK AMPERES (A)

1010101010101010FIGURE 7.CLAMPING VOL TAGE FOR V24RA22 - V36RA22

M A X I M U M P E A K V O L T S (V )

PEAK AMPERES (A)

FIGURE 8.CLAMPING VOL TAGE FOR V200RA22 - V430RA22

PEAK AMPERES (A)

1010101010101010

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RA Varistor Series

Pulse Rating Curves (Continued)

FIGURE 11.SURGE CURRENT RA TING CURVES FOR

V82RA8 - V430RA8FIGURE 12.SURGE CURRENT RA TING CURVES FOR

V18RA16 - V68RA16

100

1,000

10,000

IMPULSE DURA TION (μs)

S U R G E C U R R E N T (A )

200100502010512IMPULSE DURA TION (μs)

S U R G E C U R R E N T (A )

1,000500

NOTE:If pulse ratings are exceeded, a shift of V N(DC)(at specified current) of more than ±10% could result.This type of shift, which normally results in a decrease of V N(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.

FIGURE 9.SURGE CURRENT RA TING CURVES FOR

V8RA8 - V12RA8FIGURE 10.SURGE CURRENT RA TING CURVES FOR

V18RA8 - V68RA8

IMPULSE DURA TION (μs)

S U R G E C U R R E N T (A )

2001005020105

210.50.2

IMPULSE DURA TION (μs)

S U R G E C U R R E N T (A )

500200100502010210.50.2

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V A R I S T O R P R O D U C T S

FIGURE 13.SURGE CURRENT RA TING CURVES FOR

V82RA16 - V430RA16FIGURE 14.SURGE CURRENT RA TING CURVES FOR

V24RA22 - V36RA22

5,0002,0002001005020105250020

1001,00010,000IMPULSE DURA TION (μs)

S U R G E C U R R E N T (A )

1,0002,0002001005020105250020

100

1,000

10,000

IMPULSE DURA TION (μs)

S U R G E C U R R E N T (A )

1,000RA Varistor Series

FIGURE 15.SURGE CURRENT RA TING CURVES FOR V200RA22 - V430RA22

10,0002,0002001005020105250020

100

1,000

10,000

IMPULSE DURA TION (μs)

S U R G E C U R R E N T (A )

1,0005,0001Pulse Rating Curves (Continued)

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RA Varistor Series

Mechanical Dimensions

Ordering Information

The RA Series is supplied in bulk pack.

(0.5 MAX OFFSET (0.020 MAX)

SYMBOL RA8SERIES RA16SERIES RA22SERIES A MAX

8.85(0.348)15.1(0.594)19.1(0.752)D MAX 11.45

(0.450)19.7(0.776)25.5(1.004)e

5(0.197)7.5(0.295)7.5(0.295)E MAX 5.2(0.205) 6.3(0.248) 6.3(0.248)n MAX 0.7(0.027)0.7(0.027)0.7(0.027)?b

0.635(0.025)0.81(0.032)0.81(0.032)WEIGHT TYP

1 Gram 3.4 Grams 4.4 Grams X 2.2(0.087) 2.2(0.087) 4.4(0.173)Y 3.1 ± 0.5(0.12

2 ± 0.02)

6 ± 1

(0.236 ± 0.04)

8.9 ± 1(0.35 ± 0.04)

NOTES:

5.Dimensions in mm, dimensions in inches in parentheses.

6.Inches for reference only.