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WF06A9310FTL

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品牌：WALSIN

描述：0603(1608), 931Ω, ±1%, 1/3W

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WF06A9310FTL 概述

0603(1608), 931Ω, ±1%, 1/3W

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Approval sheet

WF10A

1%, 5%

Ultra High Power Chip Resistors

Size 1210, 3/4W

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

ASC_WF10A_V02 MAY - 2016

Page 1 of 7

Approval sheet

FEATURE

1. High reliability and stability

2. Reduced size of final equipment

3. Ultra high power

4. Higher component and equipment reliability

5. RoHS compliant and Lead free products

APPLICATION



Consumer electrical equipment

Automotive application

EDP, Computer application

Telecom application

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 paste that is applied to the top surface of the substrate. The

composition of the paste 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

ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy.

Fig 1. Construction of Chip-R

Page 2 of 7

ASC_WF10A_V02

MAY - 2016

Approval sheet

QUICK REFERENCE DATA

Item

Series No.

General Specification

WF10A

Size code

1210 ( 3225 )

5%, 1%, 0.5%

1 ~ 1M

Resistance Tolerance

Resistance Range

TCR (ppm/C)

1%, 0.5% (E24+E96):

5% (E24):

-55C ~ +155C

1 ~ 49.9: -200 ~ +500ppm/C

51 ~ 1M:   100 ppm/C

1 ~ 47: -200 ~ +500ppm/C

51 ~ 1M:   200 ppm/C

3/4 W

200V

400V

Max. dissipation at T_amb=70C

Max. Rated voltage

Max. Overload voltage

Climatic category (IEC 60068)

Basic specification

-55 ~ +155’C

JIS C 5201-1 : 1998

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  RatedPowerResistance Valueor Max. RCWV listed above, whichever is lower.

DIMENSIONS(unit : mm)

Part No

WF10A

3.10  0.15

2.50  0.15

0.55  0.15

0.45  0.25

0.50  0.25

1202

Page 3 of 7

ASC_WF10A_V02

MAY - 2016

Approval sheet

MARKING

1202 = 12Kohm

FUNCTIONAL DESCRIPTION

Product characterization

Standard values of nominal resistance are taken

from the E96 & E24 series for resistors with a

tolerance of 1%, 5%. The values of the

E24/E96 series are in accordance with “IEC

publication 60063”.

Derating

The power that the resistor can dissipate depends

on the operating temperature; see Fig.2

Fig 2. Maximum dissipation in percentage of rated

power

As a function of the ambient temperature

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 235C during 2 seconds. The test condition for no

leaching is 260C for 30 seconds. Typical examples of soldering processes that provide reliable joints without

any damage are given in Fig 3.

Fig 3. Infrared soldering profile for Chip Resistors

Page 4 of 7

ASC_WF10A_V02

MAY - 2016

Approval sheet

CATALOGUE NUMBERS

The resistors have a catalogue number starting with .

WF10

Size code

WF10: 1210

1202

Type code

Resistance code

Tolerance

F:  1%

J:  5%

Packaging code

Termination code

5%, E24: 2 significant digits

followed by no. of zeros

A : Power 3/4W

T: 7” Reeled taping L = Sn base (lead

free)

100 = 101_

10K = 103

1%, E24+E96: 3 significant

digits followed by no. of

zeros

100

=1000

=3742

37.4K



Reeled tape packaging : 8mm width paper taping 5000pcs per 7” reel.

TEST AND REQUIREMENTS(JIS C 5201-1 : 1998)

Basic specification :

The tests are carried out in accordance with IEC publication 68, "Recommended basic climatic and mechanical

robustness testing procedure for electronic components" and under standard atmospheric conditions according

to IEC 68-1, subclause 5.3, unless otherwise specified.

Temperature: 15ºC to 35ºC.

Relative humidity: 45% to 75%.

Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar).

REQUIREMENT

TEST

PROCEDURE / TEST METHOD

Resistor

DC resistance values measured at the test voltages specified

below :

DC resistance

Clause 4.5

Within the specified tolerance

<10@0.1V, <100@0.3V, <1K@1.0V,

<10K@3V,

<100K@10V, <1M@25V, <10M@30V

Natural resistance change per change in degree centigrade. Refer to

Temperature

Coefficient of

Resistance(T.C.R)

“QUICK REFERENCE DATA”

R₂ R

₁t₂t₁

10⁶(ppm/C) t₁: 20°C+5°C-1°C

Clause 4.8

R₁: Resistance at reference temperature

R₂: Resistance at test temperature

Short time

overload (S.T.O.L)

Permanent resistance change after a 2 second application of

a voltage 2.5 times RCWV or the maximum overload voltage

specified in the above list, whichever is less.

R/R max. (1%+0.05)

Clause 4.13

Resistance to

soldering heat

(R.S.H)

Un-mounted chips completely immersed for 10±1second in a

SAC solder bath at 260℃±5ºC

ΔR/R max. ±(1%+0.05Ω)

no visible damage

Clause 4.18

Solderability

Clause 4.17

95% coverage min., good tinning and

no visible damage

Un-mounted chips completely immersed for 2±0.5 second in

a SAC solder bath at 235℃±5℃

Page 5 of 7

ASC_WF10A_V02

MAY - 2016

Approval sheet

TEST

REQUIREMENT

Resistor

PROCEDURE / TEST METHOD

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

Temperature

cycling

R/R max. (1%+0.05)

R/R max. (3%+0.10)

Clause 4.19

1000 +48/-0 hours, loaded with RCWV or Vmax continuously

in humidity chamber controller at 40C2C and 90~95%

relative humidity,

Damp Heat

(Load life in

humidity)

Clause 4.24

R/R max. (3%+0.10)

1000+48/-0 hours; loaded with RCWV or V_maxin chamber

Load Life

(Endurance)

controller 70±2ºC, 1.5 hours on and 0.5 hours off

Clause 4.25

Resistors mounted on a 90mm glass epoxy resin PCB(FR4),

bending once 3mm for 10sec.

No visual damaged,

Bending strength

Clause 4.33

R/R max. (1%+0.05)

No remarkable damage or removal of

the terminations

Adhesion

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

Clause 4.32

Insulation

Apply the maximum overload voltage (DC) for 1minutes

R≧1GΩ

Resistance

Clause 4.6

Dielectric Withstand

Voltage

Apply the maximum overload voltage (AC) for 1 minutes

No breakdown or flashover

Clause 4.7

Page 6 of 7

ASC_WF10A_V02

MAY - 2016

Approval sheet

PACKAGING

Paper Tape specifications (unit :mm)

Component Size / Series

D

1.50

0.1

0.0

8.00±0.30

3.50±0.20

1.75±0.10

4.00±0.10

WF10A

Component Size / Series

WF10A

4.00±0.10

3.60±0.20

3.00±0.20

Max. 1.0

Reel dimensions

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/reel

Page 7 of 7

ASC_WF10A_V02

MAY - 2016

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