V430CH8中文资料

Transient Voltage Surge Suppressor

CH series transient surge suppressors are small, metal-oxide varistors (MOVs) manufactured in leadless chip form.They are intended for use in a variety of applications from low voltage DC to off-line board-level protection.These devices, which have significantly lower profiles than traditional radial-lead varistors, permit designers to reduce the size and weight and increase the reliability of their equipment designs.

CH series varistors are available in a voltage range from 14V to 275V V M(AC)RMS , and energy ratings up to 23J.See the Littelfuse Multilayer Suppressor Series also.

Features

? Lead-Free

? Leadless, Surface Mount Chip in 5 x 8mm Size

? Voltage Ratings V M(AC)RMS ,......................14V to 275V ? Supplied in Tape and Reel or Bulk Pack ? No Derating up to 125o C Ambient

AGENCY APPROVALS:Recognized under the components program of

Underwriters Laboratories.

AGENCY FILE NUMBERS:UL E75961, E135010.

3

S U R F A C E M O U N T V A R I S T O R S

Transient Voltage Surge Suppressor

CH Varistor Series

PART NUMBER MAXIMUM RATINGS (125o C)

SPECIFICATIONS (25o C)

CONTINUOUS

TRANSIENT

VARISTOR VOLTAGE AT 1mA

DC TEST CURRENT MAX CLAMPING VOLT 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)V22CH81418(Note 3)10.0(Note 2)25018.722.026.04751600V27CH81722 1.025023.027.031.15751300V33CH82026 1.225029.533.036.56851100V39CH82531 1.525035.039.043.0795900V47CH83038 1.825042.047.052.0925800V56CH83545 2.325050.056.062.01075700V120CH8

75102 6.0500108.0120.0132.020010300?V150CH8951278.0500135.0150.0165.025010250?V180CH811515310.0500162.0180.0198.029510200?V200CH813017511.0500184.0200.0228.034010180?V220CH814018012.0500198.0220.0242.036010160?V240CH815020013.0500212.0240.0268.039510150?V360CH823030020.0500324.0360.0396.059510100?V390CH825033021.0500354.0390.0429.06501090?V430CH8

275

369

23.0

500

389.0

430.0

473.0

710

10

80

NOTES:

1.Power dissipation of transients not to exceed 0.25W.

2.Energy rating for impulse duration of 30ms minimum to one half of peak current value.

3.Also rated to withstand 24V for 5 minutes.

?V150 - V430 CH Varistors are recognized under UL ?le #E75961 as a recognized component.

V68CH84056 3.025061.068.075.012710600Absolute 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 ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 to 275V DC Voltage Range (V M(DC)). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 to 369V T ransient:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V Peak Pulse Current (I TM )

For 8/20μs Current Wave (See Figure 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 to 500A Single Pulse Energy Range

For 10/1000μs Current Wave (W TM ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 to 23J

Operating Ambient Temperature Range (T A ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125O

C

Storage Temperature Range (T STG ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 150O

C Temperature Coefficient (αV) of Clamping Voltage (V C ) at Specified Test Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01%/O C

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

CH SERIES UNITS

Pb

RoHS

Transient Voltage Surge Suppressor

CH Varistor Series

Power Dissipation Ratings

Continuous power dissipation capability is not an applicable design

requirement for a suppressor, unless transients occur in rapid succession.

Under this condition, 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 tempera-

tures 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

100

90

80

70

60

50

40

30

20

10

AMBIENT TEMPERA TURE (o C)

P

E

R

C

E

N

T

O

F

R

A

T

E

D

V

A

L

U

E

FIGURE 2.PEAK PULSE CURRENT TEST WA VEFORM

O

P

E

R

C

E

N

T

O

F

P

E

A

K

V

A

L

U

E

O1 = Virtual Origin of Wave

T = Time From 10% to 90% of Peak

T1 = Virtual Front time = 1.25 ? t

T2 = Virtual Time to Half Value (Impulse Duration)

Example:For an 8/20μs Current Waveform:

8μs = T1 = Virtual Front Time

20μs = T2 = Virtual Time to Half Value

FIGURE 3.CLAMPING VOL TAGE FOR V22CH8 - V68CH8

500

400

300

200

100

90

80

70

60

50

40

30

20

10

M

A

X

I

M

U

M

P

E

A

K

V

O

L

T

S

(

V

)

PEAK AMPERES (A)

10101010101010

FIGURE 4.CLAMPING V OL TAGE FOR V120CH8 - V430CH8

1010101010101010

PEAK AMPERES (A)

M

A

X

I

M

U

M

P

E

A

K

V

O

L

T

S

(

V

)

Transient V-I Characteristics Curves

Pb

RoHS

3

S

U

R

F

A

C

E

M

O

U

N

T

V

A

R

I

S

T

O

R

S

Transient Voltage Surge Suppressor

CH Varistor Series

Recommended Pad Outline

FIGURE 5.SURGE CURRENT RA TING CURVES FOR

V22CH8 - V56CH8

500

2005020105210.20.510020

100

1,000

10,000

IMPULSE DURA TION (μs)

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

Pulse Rating Curves

FIGURE 6.SURGE CURRENT RA TING CURVES FOR

V120CH8 - V430CH8

20

100

1,000

10,000

IMPULSE DURA TION (μs)

2,000

1,000500

200100502010521

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

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.

Mechanical Dimensions

E

PASSIV A TION

CONTACT AREA

W

L

D

SYMBOL

INCHES

MILLIMETERS MIN MAX MIN MAX D -0.080- 2.03E 0.0160.0500.41 1.27L 0.3110.3357.908.51W

0.185

0.207

4.70

5.26

SYMBOL

INCHES MILLIMETERS

A 0.40210.21

B 0.216 5.50C

0.087

2.21

NOTE:Avoid metal runs in this area. Soldering recommendations: Material - 62/36/2 Sn/Pb/Ag or equivalent. T emperature - 230o C Max., 5s. Max. Flux - R.M.A.

Pb

RoHS

Transient Voltage Surge Suppressor

CH Varistor Series

Standard Packaging

CH Series varistors are always shipped in tape and reel.The standard 13in reel utilized contains 4000 pieces.

Note also that the CH Series receives no branding on the chip itself.

Tape and Reel Specifications

? Conforms to EIA-481, Revision A

? Can be Supplied to lEG Publication 286-3

Special Packaging

Option 1 -7-inch reels containing 1000 pieces are available.T o order

7in reels add a T suffix to the part number;e.g., V47CH8T.

Option 2 - For small quantities (less than 100 pieces) the units are

shipped bulk pack.To order, add a S suffix to the part number;e.g., V47CH8S.

Ordering Information

CROSS SECTION

(REF. PLANE FOR A 0 & B 0)

R 1

R 2K 0

A 0

R 3

B 0

H 0K 0

SECTION THRU CA VITY

T T

K

MINIMUM BENDING RADIUS

R 4

CA VITY DETAILS

SYMBOL

PARAMETER

SIZE (mm)B 0

Cavity Length 8.5±0.1A 0Cavity Width 5.5±0.1K 0Cavity Depth

2.0 Min.H 0Ref. Plane for A 0 and B 0+0.100.3

-0.05R 1, R 2, R 3

Tape Cavity Radii 0.5 Max.T

Carrier T ape Thickness 1.0 Max.T 1Cover T ape Thickness 0.1 Max.E Sprocket Hole from Edge 1.75±0.1P 0Sprocket Hole Pitch 4.0±0.1D

Sprocket Hole Diameter

+0.1 1.5 -0.0P 2Hole Centre to Component Centre 2.0±0.15R 4Min. Bending Radius 40.0 Min.D 1Ejection Hole Diameter 1.5 Min.K Overall Thickness 3.0 Min.P Pitch Of Component

8.0±0.1F Sprocket Hole to Ejection Hole 7.5±0.1W

Carrier T ape Width

16.0±0.3

Pb

RoHS 3

S U R F A C E M O U N T V A R I S T O R S