WF08R4R70CTLS [WALSIN]

Low resistance with superior pulse withstand ability;


型号：	WF08R4R70CTLS
厂家：	Walsin Technology
描述：	Low resistance with superior pulse withstand ability
文件：	总11页 (文件大小：878K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Approval Sheet

WF12Q/R_S, WF08Q/R_S, WF06Q/R_S

WF04T/U_S

1%, 0.5%, 0.25%, 0.1%,

TC50, TC25

Thin Film Pulse Withstanding Chip Resistors

(RoHS compliant 、Halogen Free)

Size 1206, 0805, 0603, 0402

*Contents in this sheet are subject to change without prior notice.

Page 1 of 11

ASC_WFxx_S V01

Aug - 2018

Approval Sheet

FEATURE

1. SMD metal thin film resistor

2. High reliability and stability of 0.5% and below per customer request

3. High performance of TCR: 50 & 25 ppm/C and below per customer request

4. Low current noise

5. RoHS compliant and lead free

6. Sulfuration resistant against ASTM B-809-95

7. Low resistance with superior pulse withstand ability

8. Meet the requirements of standards of specifications as IEC 60115-1 4.24.2, test 96 hours at 85℃/85%RH.

9. Meet the requirements of Q/GDW 11179.3-2014 Class C, 10ms application of a voltage 10 times RCWV

APPLICATION



Test equipment

Measuring instrument

E-meter

Smart meter

Advanced Metering Infrastructure

DESCRIPTION

The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are

added at each end and connected by a resistive layer that is applied to the top surface of the substrate. The

composition of the resistive layer is adjusted to give the approximate resistance required and the value is

trimmed to nominated value within tolerance which controlled by laser trimming of this resistive layer.

The resistive layer is covered with a protective coat. Finally, the two external end terminations are added. For

environmental soldering issue, the outer layer of these end terminations is a Lead-free solder .

Fig 1. Construction of Chip-R WFxx_S

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ASC_WFxx_S V01

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Approval Sheet

Item

Series No.

General Specification

WF08 Q/R_S WF06 Q/R_S

WF12 Q/R_S

WF04 T/U_S

Size Code

1206

0805

0603

0402

( 3216 )

( 2012 )

( 1608 )

(1005)

Resistance Tolerance

Resistance Range

TCR (ppm/C)

1.0%, 0.5%, 0.25%, 0.1%

1 ~ 30

1 ~ 20

25 ppm/C : 4.7~20

50 ppm/C : 1 ~ 20

25 ppm/C : 4.7~20

50 ppm/C : 1 ~ 20

50 ppm/C/ 25 ppm/C

Max. Dissipation at

T_amb=70C

1/4W

200V

400V

1/8W

150V

300V

1/10W

75V

1/16W

25V

Max. Operating

Voltage

Max. Overload

Voltage

150V

50V

Operating

Temperature

- 55~ +155C

QUICK REFERENCE DATA

Note :

This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication

60115-8”

Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by

RCWV



Rated Power  Resistance

Value

or Max. RCWV listed above, whichever is lower.

1 ~ 20 for 0603/0402 : TCR 25 ppm/ is upon requested.

DIMENSIONS :(unit:mm)

WF12Q/R_S

WF08Q/R_S

WF06Q/R_S

WF04T/U_S

Type

3.05  0.15

1.55  0.15

0.40  0.20

0.55  0.15

2.00  0.10

1.25  0.10

0.25  0.20

0.40  0.20

0.50  0.15

1.55  0.10

0.80  0.10

0.25  0.15

0.30  0.15

0.45  0.15

1.00  0.10

0.50  0.05

0.30  0.15

0.35  0.05

Protective coat

End termination

Resistive layer

Ceramic Substrate

1001

Page 3 of 11

ASC_WFxxS V01

Aug - 2018

Approval Sheet

MARKING



3-digits marking for 0603 size

WFxx_S has same marking rule as WRxx ±1%.

Nominal resistance

Description

1.E-24 series

2.E-96 series

As 0603 WR06X 5%.

The 1st two digit codes are referring to the CODE on the table, the 3rd code is the index of resistance

value :

Y=10^-2，X=10^-1，A=10⁰，B=10¹，C=10²，D=10³，E=10⁴，F=10⁵

EX :

17.8Ω=25X，178Ω=25A，1K78 =25B

17K8=25C， 178K=25D， 1M78=25E

3. Remark

There is no marking for the items are not under E-24 and E-96 series

CODE R_value CODE R_value CODE R_Value CODE R_value CODE R_value CODE R_value CODE R_value CODE R_value

100

102

105

107

110

113

115

118

121

124

127

130

133

137

140

143

147

150

154

158

162

165

169

174

178

182

187

191

196

200

205

210

215

221

226

232

237

243

249

255

261

267

274

280

287

294

301

309

316

324

332

340

348

357

365

374

383

392

402

412

422

432

442

453

464

475

487

499

511

523

536

549

562

576

590

604

619

634

649

665

681

698

715

732

750

768

787

806

825

845

866

887

909

931

953

976



4-digits marking for 1206, 0805 size

For E24+E96, each resistor is marked with a four digits code on the protective coating to designate the

nominal resistance value. For values below 976 the R is used as a digit. For values of 100 or greater, the

first 3 digits are significant; the fourth digit indicates the number of multiple to follow.

Example

RESISTANCE

10

12

100

6800

47000

4-digits marking

10R0

12R0

1000

6801

4702





No marking code for 0402 size

FUNCTIONAL DESCRIPTION

Product characterization

Standard values of nominal resistance are taken from the E192 & E24 series for resistors with a tolerance of

1.0%, 0.5%, 0.25%, 0.1%. The values of the E24/E192 series are in accordance with “IEC publication

60063”.

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Approval Sheet

Derating

The power that the resistor can dissipate depends on the operating temperature; see Fig.2

MOUNTING

Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by

automatic placement systems.

Chip placement can be on ceramic substrates and printed-circuit boards (PCBs).

Electrical connection to the circuit is by individual soldering condition.

The end terminations guarantee a reliable contact.

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Approval Sheet

SOLDERING CONDITION

The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260C for

10 seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete

components on the reverse (mixed PCBs).

Surface Mount Resistors are tested for solderability at 245C during 5 seconds within lead-free solder bath. The

test condition for no leaching is 260C for 30 seconds. Typical examples of soldering profile and condition that

provide reliable joints without any damage are given in Fig 3. and Table 1.

Fig. 3 Infrared soldering profile for Chip Resistors

Table 1. Infrared soldering condition for Chip Resistors

Temperature Condition

Average ramp-up rate (217C to 260C)

Between 150 and 200C

> 217C

Exposure Time

Less than 3C/second

Between 60-120 seconds

Between 60-150 seconds

260ºC +0/-5C

Peak Temperature

Min. 30 seconds

Time within 245C

Ramp-down rate (Peak to 217C)

Time from 25C to Peak

Less than 6C/second

No greater than 480 seconds

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ASC_WFxxS V01

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Approval Sheet

CATALOGUE NUMBERS

The resistors have a catalogue number starting with.

WF06

Q/R

xxxx

Size code

Type code

Resistance code

220=2200

Tolerance

B : 0.10%

C : 0.25%

D : 0.50%

F : 1.00%

Packaging code

Termination code

Special code

WF12: 1206 Q: TCR = 25 ppm

WF08: 0805 R: TCR = 25 ppm

WF06: 0603 High Power

T : 7” Reel taping

L = lead free

S :Pulse

withstanding

20 =20R0

4.7 =4R70

WF04: 0402 T: TCR = 25 ppm

U: TCR = 25 ppm

Normal Power

1. Reeled tape packaging: 8mm width paper taping.

5,000pcs/reel for WF12_S, WF08_S, WF06_S,

10,000pcs/reel for WF04_S;

Page 7 of 11

ASC_WFxxS V01

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Approval Sheet

TEST AND REQUIREMENTS

REQUIREMENT

TEST

PROCEDURE

Resistor

DC resistance

DC resistance values measured

Within the specified tolerance

IEC60115-1 4.5.1

Temperature

Coefficient of

Natural resistance change per change in degree Refer to

centigrade.

“ QUICK REFERENCE DATA “

Resistance(T.C.R)

IEC 60115-1 4.8.4.1

R ₂ R₁

 10 (ppm/C)

R₁



t₂ t₁



R₁: Resistance at reference temperature

R₂: Resistance at test temperature

t₁: 20°C+5°C-1°C

t2 : 125°C+5°C-1°C

Short time overload

(S.T.O.L)

Permanent resistance change after

a 5second

R/R max. ±(0.5%+0.05)

application of a voltage 2.5 times RCWV or the

maximum overload voltage specified in the above

list, whichever is less.

IEC60115-1 4.13

Measure test conclusion after 30mins

Resistance to soldering

heat(R.S.H)

IEC 60115-1 4.18

Un-mounted chips completely immersed for no visible damage

10±1second in a SAC solder bath at 260℃±5ºC

 R/R max. ±(0.2%+0.05)

Solderability

1.Un-mounted chips completely immersed for 5 good tinning (>95% covered)

seconds in a SAC solder bath at 245℃±5℃

no visible damage

IEC 60115-1 4.17

Temperature cycling

no visible damage

30 minutes at -55C3C, 2~3 minutes at 20°C+5°C-

1°C, 30 minutes at +155C3C, 2~3 minutes at

20°C+5°C-1°C, total 5 continuous cycles

IEC 60115-1 4.19

R/R max. (0.5%+0.05)

Load life (endurance)

70±2ºC, 1000 hours, loaded with RCWV or

Vmax,1.5 hours on and 0.5 hours off

R/R max. (0.5%+0.05)

IEC 60115-1 4.25.1

Load life in Humidity

1000 hours, at rated continuous working voltage in

humidity chamber controller at 40C2C and

90~95% relative humidity, 1.5hours on and 0.5 hours

off

IEC 60115-1 4.24.2

Bending strength

Resistors mounted on a 90mm glass epoxy resin

PCB(FR4); bending : 3 mm, once for 10 seconds.

R/R max. ±(0.1%+0.05)

IEC 60115-1 4.33

Pressurizing force: 5N, Test time: 10±1sec.

Adhesion

No remarkable damage or removal of

the terminations.

IEC 60115-1 4.32

Insulation Resistance

R≧10GΩ

Apply the maximum overload voltage (DC) for

1minute

Clause 4.6

Dielectric Withstand

Apply the maximum overload voltage (AC) for 1 No breakdown or flashover

minute

Voltage

Clause 4.7

Flower of Sulfur

Sulfur 480 hours, 60°C, unpowered

R/R max. ±(1%+0.05)

ASTM-B-809-95

Page 8 of 11

ASC_WFxxS V01

Aug - 2018

Approval Sheet

PACKAGING

Paper Tape specifications (unit :mm)

Series No.

WF12

Tape

Paper

3.60±0.20

2.40±0.20

1.90±0.20

1.20±0.10

2.00±0.20

1.65±0.20

1.10±0.20

0.7±0.10

8.00±0.30

8.00±0.20

3.50±0.20

3.50±0.05

1.75±0.10

WF08

WF06

WF04

Series No.

WF12

D

 0 .1

 0 .0

4.00±0.10

Max. 1.0

 1 .50

 0 .1

 0 .0

WF08

WF06

4.00±0.10

Max. 1.0

 0 .1

 0 .0

0.65±0.05

 0 .1

 0 .0

2.00±0.10

4.00±0.10

0.40±0.05

WF04

Page 9 of 11

ASC_WFxxS V01

Aug - 2018

Approval Sheet

Reel dimensions

WF12_S, WF08_S, WF06_S, WF04_S

Symbol

(unit : mm)

13.0±0.2

9.0±0.5

178.0±2.0

60.0±1.0

Taping quantity

Chip resistors 5,000 pcs per reel ( WF12_S, WF08_S, WF06_S )

Chip resistors 10,000 pcs per reel ( WF04_S )

Page 10 of 11

ASC_WFxxS V01

Aug - 2018

Approval Sheet

PULSE LOAD PERFORMANCE:

Single Pulse

1,000 rectangular pulse amplitudes are applied to the component at intervals of 60seconds,

Permissible resistance to be varied by ± (0.5% R + 0.05Ω).

Continuous Pulse

Continuous load is a pulse period generated by the repetitive rectangular pulse amplitude,

the applied power dissipation is at a rated power of 70 ° C.

Permissible resistance to be varied by ± (0.5% R + 0.05Ω).

Page 11 of 11

ASC_WFxxS V01

Aug - 2018

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