Approval sheet
Page 1 of 7 ASC_WA02Y_V05 Jan.2012
WA02Y
±
±±
±5%, ±
±±
±1% Convex Type
General purpose chip resistors array
Size 0201x2
*Contents in this sheet are subject to change without prior notice.
Approval sheet
Page 2 of 7 ASC_WA02Y_V05 Jan.2012
FEATURE
1. Small size and light weight
2. Reduced size of final equipment
3. Lower surface mounted assembly costs
4. Higher component and equipment reliability
APPLICATION
• Consumer electrical equipment, PDA, Digital Cam-coder, …
• EDP, Computer application
• Mobile phone, Telecom
• Ram module
DESCRIPTION
The resistors array is 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
within tolerance by laser cutting 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) solder alloy.
Fig 1. Outline of chip-R array WA02Y
Approval sheet
Page 3 of 7 ASC_WA02Y_V05 Jan.2012
QUICK REFERENCE DATA
Item General Specification
Series No. WA02Y
Size 0201x2 (0603x2)
Termination construction Convex type
Resistance Tolerance ±5%, ±1% (E24 series)
Resistance Range 10Ω ~ 1MΩ, Jumper (< 50mΩ)
TCR (ppm/°C) ≤ ± 300 ppm/°C
Max. dissipation at T
amb
=70°C 1/32 W
Max. Operation Voltage (DC or RMS) 12.5V
Max. overload voltage 25V
Rated current for Jumper 0.5A
Climatic category (IEC 60068) 55/125/56
Note :
1. This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication
60115-8”
2. Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by
ValueResistancePower RatedRCWV ×=
or Max. RCWV listed above, whichever is lower.
DIMENSIONS(unit：
：：
：mm)
WA02Y
L 0.80 ± 0.10
W 0.60 ± 0.10
T 0.35 ± 0.10
P 0.50 ± 0.10
A 0.35 ± 0.10
Ta 0.15 ± 0.10
Tb 0.15 ± 0.10
T
T
b
W
L
A
T
a
P
Approval sheet
Page 4 of 7 ASC_WA02Y_V05 Jan.2012
MARKING
No marking for WA02Y chip resistors array
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of ±5%,
±1%. The values of the E24 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
CONSTRUCTION
R1=R2
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.
Approval sheet
Page 5 of 7 ASC_WA02Y_V05 Jan.2012
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 array
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
WA02 Y 472_ J T L
Size code
WA02 : 0201
Type code
Y : x2, convex
Resistance code
5% E24 : 2 significant digits
followed by no. of zeros and
a blank
4.7Ω =4R7_
10Ω =100_
220Ω =221_
Jumper =000_
(“_” means a blank)
1%, E24+E96: 3 significant digits
followed by no. of zeros
100Ω =1000
37.4KΩ =3742
Tolerance
J : ±5%
F : ±1%
P : Jumper
Packaging code
T : 7” Reel
10kpcs Reel
taping
A: 7” 15kpcs
Reel taping
Termination code
L = Sn base
(lead free)
Reeled tape packaging : 8mm width paper taping 7” reel 10,000pcs/15,000pcs per reel,
Approval sheet
Page 6 of 7 ASC_WA02Y_V05 Jan.2012
TEST AND REQUIREMENTS
REQUIREMENT
TEST PROCEDURE Resistor Jumper
DC resistance values measured at the test
voltages specified below :
Resistance <100Ω <1KΩ <10KΩ
Test voltage 0.3V 1.0V 3.0V
Resistance <100KΩ
<1MΩ <10MΩ
DC resistance
Clause 4.5
Test voltage 10V 25V 30V
Within the specified tolerance
< 50mΩ
Temperature
Coefficient of
Resistance(T.C.R)
Clause 4.8
Natural resistance change per change in degree
centigrade.
( )
6
121
12 10×
−
−
ttR RR
(ppm/°C)
R
1
: Resistance at reference temperature
R
2
: Resistance at test temperature
t
1
: 20°C+5°C-1°C
Refer to
“QUICK REFERENCE DATA”
N/a
Short time overload
(S.T.O.L)
Clause 4.13
Permanent resistance change after a 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
Resistance to
soldering heat
(R.S.H)
Clause 4.18
Un-mounted chips completely immersed for
10±1second in a SAC solder bath at 260℃±5ºC no visible damage
∆ R/R max. ±(1.0%+0.05Ω) no visible
damage,
< 50mΩ
Solderability
Clause 4.17 Un-mounted chips completely immersed for 2±0.5
second in a SAC solder bath at 235℃±5℃ good tinning (>95% covered)
no visible damage
Temperature
cycling
Clause 4.19
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
no visible damage
∆R/R max. ±(1%+0.05Ω) no visible
damage,
< 50mΩ
Load
Life(Endurance)
Clause 4.25
70±2ºC, 1000
+48/-0
hours, loaded with RCWV or
Vmax,1.5 hours ON and 0.5 hours OFF ∆R/R max: ±(3%+0.1Ω)
< 50mΩ
Damp Heat
(Load life in
humidity)
Clause 4.24
1
000+48/-0 hours; 1.5hours ON, 0.5hours OFF at
RCWV in a humidity chamber controlled 40±2°C,
90~95% RH
∆R/R max: ±(3%+0.1Ω) < 50mΩ
Adhesion
Clause 4.32
Pressurizing force: 5N, Test time: 10±1sec. No remarkable damage or
removal of the terminations N/a
Approval sheet
Page 7 of 7 ASC_WA02Y_V05 Jan.2012
PACKAGING
Paper Tape specifications (unit :mm)
W
E
F
A
0
T
B
0
P
0
P
2
φ
D
0
P
1
A0 B0 W F E
(mm) 0.70
+0.10/-0.05
0.90
+0.10/-0.05
8.00 ± 0.20 3.50 ± 0.05 1.75 ± 0.10
P1 P2 P0 ØD0 T
(mm) 2.00 ± 0.10 2.00 ± 0.05 4.0 ± 0.10
10.0
0
50.1
+
−
0.50 ± 0.10
Reel dimensions
Symbol A B C D
(unit : mm) Φ178.0 ± 2.0 Φ60.0 ± 1.0 13.0 ± 0.2 9.0 ± 0.5
