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WR02W4R7_FALV

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品牌：WALSIN

描述：General purpose & Anti-sulfuration chip resistors

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WR02W4R7_FALV 概述

General purpose & Anti-sulfuration chip resistors

WR02W4R7_FALV 数据手册

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Approval sheet

WR02X(W)

±5%, ±1%

General purpose & Anti-sulfuration chip

resistors

Size 0201

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

Page 1 of 7

ASC_WR02X_V_V01

Jun-2012

Approval sheet

FEATURE

1. Small size and light weight

2. High reliability and stability

3. Reduced size of final equipment

4. Suitable for high density print circuit board assembly

5. Anti-sulfuration ASTM B-809 compliant

6. Lead free product

APPLICATION

•

Mobile phone

PDA

Camcorders

Palmtop computers

Hybrid module

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 pure Tin.

Fig 1. Construction of Chip-R WR02X

Page 2 of 7

ASC_WR02X_V_V01

Jun-2012

Approval sheet

QUICK REFERENCE DATA

Item

Series No.

General Specification

WR02X(W)

Size code

0201(0603)

Resistance Range

1Ω~10MΩ ( ±5% tolerance ), Jumper

1Ω~3.3MΩ ( ±1% tolerance )

Resistance Tolerance

TCR (ppm/°C)

±1%

E96/E24

±5%

E24

10Ω - 10MΩ, ≤±200

1 - 9.76Ω, +600~-200

Max. dissipation @ T_amb=70°C

1/20 W

25V

Max. Operation Voltage (DC or

RMS)

Max. Overload Voltage (DC or

RMS)

50V

Climatic category

(IEC 60068)

55/125/56

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

or Max. RCWV listed above, whichever is lower.

RCWV = RatedPower×ResistanceValue

DIMENSION(unit : mm)

Protective coat

WR02X(W)

0.60 ± 0.03

0.30 ± 0.03

0.23 ± 0.03

0.15 ± 0.05

0.10 ± 0.05

End termination

Resistive layer

Ceramic Substrate

MARKING

WR02X(W) has no marking.

Page 3 of 7

ASC_WR02X_V_V01

Jun-2012

Approval sheet

FUNCTIONAL DESCRIPTION

Product characterization

Standard values of nominal resistance are taken from the E24/E96 series for resistors with a tolerance of ±5%

& ±1%. 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

Figure 2. Maximum dissipation in percentage of rated power

As a function of the ambient temperature

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.

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 WR02X(W)

Page 4 of 7

ASC_WR02X_V_V01

Jun-2012

Approval sheet

CATALOGUE NUMBERS

The resistors have a catalogue number starting with :

WR02

472_

Special code

V =

Size code

Type code

X : Normal

W : 1% For

Resistance code

Tolerance

J : ±5%

Packaging code

Termination

code

WR02

0201

5%, E24: 2 significant

digits followed by

no. of zeros

: 7” Reeled

taping

= Sn base

(lead free)

1. 100% CCD

visual

F : ±1%

(15Kpcs/Reel)

<10Ω and

>1MΩ

P : Jumper

taping

: 7” Reeled

inspection

4.7Ω

10Ω

=4R7_

2. Anti-sulfur

ASTM B-809

compliant

=100_

=221_

= 103

=000_

(20Kpcs/Reel)

220Ω

10KΩ

Jumper

(“_” means a blank)

1%, E24+E96: 3

significant digits

followed by no. of

zeros

4.7Ω

10Ω

=4R70

=10R0

=1000

=3742

100Ω

37.4KΩ

Page 5 of 7

ASC_WR02X_V_V01

Jun-2012

Approval sheet

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

REQUIREMENT

Resistor

TEST

PROCEDURE / TEST METHOD

0Ω

DC resistance values measured at the test voltages

specified below :

DC resistance

Clause 4.5

Within the specified tolerance

<50mΩ

<10Ω@0.1V, <100Ω@0.3V, <1KΩ@1.0V,

<10KΩ@3V, <100KΩ@10V, <1MΩ@25V,

<10MΩ@30V

Natural resistance change per change in degree Refer to

centigrade.

Temperature Coefficient

of Resistance(T.C.R)

“QUICK REFERENCE DATA”

Clause 4.8

R₂− R

×10⁶(ppm/°C) t₁: 20°C+5°C-1°C

N/a

(

t₂− t₁

)

R₁: Resistance at reference temperature

R₂: Resistance at test temperature

Short time overload

(S.T.O.L)

Permanent resistance change after

5second

application of a voltage 2.5 times RCWV or the maximum

overload voltage specified in the above list, whichever is

less.

∆R/R max. ±(2%+0.10Ω)

<50mΩ

Clause 4.13

Un-mounted chips completely immersed for 10±1second

in a SAC solder bath at 260℃±5ºC

Resistance to soldering

heat(R.S.H)

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±0.8second

in a SAC solder bath at 235℃±5℃

30 minutes at -55°C±3°C, 2~3 minutes at 20°C+5°C-1°C,

30 minutes at +125°C±3°C, 2~3 minutes at 20°C+5°C-

1°C, total 5 continuous cycles

Temperature cycling

∆R/R max. ±(1%+0.05Ω)

< 50mΩ

Clause 4.19

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

humidity chamber controller at 40°C±2°C and 90~95%

relative humidity, 1.5hours on and 0.5 hours off

10Ω≤R<1MΩ :

Damp Heat

∆R/R max. ±(3%+0.10Ω)

R<10Ω, R≥1MΩ :

(Load life in humidity)

Clause 4.24

∆R/R max. ±(5%+0.10Ω)

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

Load Life (Endurance)

Ditto.

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

Clause 4.25

Resistors mounted on a 90mm glass epoxy resin No visual damaged,

Bending strength

< 50mΩ

PCB(FR4), bending once 5mm for 10sec.

∆R/R max. ±(1%+0.05Ω)

Clause 4.33

No remarkable damage or removal of the

terminations

Adhesion

Pressurizing force: 3N, Test time: 10±1sec.

Clause 4.32

Page 6 of 7

ASC_WR02X_V_V01

Jun-2012

Approval sheet

PACKAGING

Paper Tape specifications (unit :mm)

Series No.

WR02X

0.67±0.05

0.37±0.05

8.00±0.20

3.50±0.05

1.75±0.10

Series No.

WR02X

ΦD

+0.1

2.00±0.05

4.00±0.05

0.45±0.05

Φ1.50

−0.0

Reel dimensions

Symbol

(unit : mm)

Φ60.0±1.0

Φ60.0+1/-0

13.0±0.2

9.0+1/-0

Φ180.0+0/-1.5

Taping quantity and Tape material

Chip resistors 15,000 pcs/reel, Paper tape.

Page 7 of 7

ASC_WR02X_V_V01

Jun-2012

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