Walsin Technology Corporation
WR02X
±5%, ±1%
General purpose chip resistors
Size 0201
Customer
:
Approval No :
Issue Date
:
Customer Approval :
Page 1 of 8
WR02X
Version 05
Nov.-2006
Walsin Technology Corporation
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. Higher component and equipment reliability
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. Consctruction of Chip-R WR02X
Page 2 of 8
WR02X
Version 05
Nov.-2006
Walsin Technology Corporation
QUICK REFERENCE DATA
Item
Series No.
Size code
Resistance
Range
Resistance
Tolerance
TCR (ppm/°C)
R≥1MΩ
1MΩ＞R＞10Ω
≤±500
51Ω - 910K,≤±400
10Ω - 50Ω,
≤±500
General Specification
WR02
0201(0603)
1Ω~10MΩ(±5% tolerance),10Ω~1MΩ(±1% tolerance), Jumper
±1%
E96/E24
±5%
E24
R≤10Ω
Max. dissipation
@ T
amb
=70°C
Max. Operation
Voltage (DC or
RMS)
Max. Overload
Voltage (DC or
RMS)
Climatic
category (IEC
60068)
Note :
1.
2.
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
1/20 W
15V
30V
55/155/56
RCWV
=
Rated Power
×
Resistance Value
or Max. RCWV listed above, whichever is lower.
Dimensions:
WR02X
L
W
T
Tb
Tt
0.60
±
0.03
0.30
±
0.03
0.23
±
0.03
0.15
±
0.05
0.05
~
0.20
W T
L
T
End termination
Tb
Tt
Resistive layer
Ceramic S
ubstrate
Protec tive c oat
Page 3 of 8
WR02X
Version 05
Nov.-2006
Walsin Technology Corporation
Marking
WR02X has no marking.
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 one minute. 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 60
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
Page 4 of 8
WR02X
Version 05
Nov.-2006
Walsin Technology Corporation
CATALOGUE NUMBERS
The resistors have a catalogue number starting with :
WR02
Size code
WR02
: 0201
Type code
X : Normal
X
472_
Resistance code
E24 : 2 significant digits
followed by no. of
zeros and a blank
4.7Ω
10Ω
220Ω
Jumper
=4R7_
=100_
=221_
=000_
J
Tolerance
J :
±5%
F :
±1%
P : Jumper
T
Packaging code
T
: 7” Reeled taping
L
Termination code
_ = SnPb base (“_”
means a blank)
L
=
Sn base (lead
free)
(“_” means a blank)
Reeled tape packaging : 8mm width paper taping 10,000pcs per reel.
Resistance code: +/-5%, E24
OHM
10R
11R
12R
13R
15R
16R
18R
20R
22R
24R
27R
30R
33R
36R
39R
43R
47R
51R
56R
62R
68R
75R
OHM
82R
91R
Code
10R
11R
12R
13R
15R
16R
18R
20R
22R
24R
27R
30R
33R
36R
39R
43R
47R
51R
56R
62R
68R
75R
Code
82R
91R
OHM
100R
110R
120R
130R
150R
160R
180R
200R
220R
240R
270R
300R
330R
360R
390R
430R
470R
510R
560R
620R
680R
750R
OHM
820R
910R
Code
101
111
121
131
151
161
181
201
221
241
271
301
331
361
391
431
471
511
561
621
681
751
Code
821
911
WR02X
OHM
1K0
1K1
1K2
1K3
1K5
1K6
1K8
2K0
2K2
2K4
2K7
3K0
3K3
3K6
3K9
4K3
4K7
5K1
5K6
6K2
6K8
7K5
OHM
8K2
9K1
Code
102
112
122
132
152
162
182
202
222
242
272
302
332
362
392
432
472
512
562
622
682
752
Code
822
912
OHM
10K
11K
12K
13K
15K
16K
18K
20K
22K
24K
27K
30K
33K
36K
39K
43K
47K
51K
56K
62K
68K
75K
OHM
82K
91K
Code
103
113
123
133
153
163
183
203
223
243
273
303
333
363
393
433
473
513
563
623
683
753
Code
823
913
OHM
100K
110K
120K
130K
150K
160K
180K
200K
220K
240K
270K
300K
330K
360K
390K
430K
470K
510K
560K
620K
680K
750K
OHM
820K
910K
Code
104
114
124
134
154
164
184
204
224
244
274
304
334
364
394
434
474
514
564
624
684
754
Code
824
914
Nov.-2006
Page 5 of 8
Version 05
嵌入式系统
