Approval sheet
Page 1 of 9 ASC_WA04/06_V15 Oct.2010
WA04, WA06
±
±±
±1%, ±
±±
±5%, Convex Type & Concave Type
General purpose chip resistors array
Size 0402x2 (4p2R)
Size 0402x4, 0603x4 (8p4R)
Size 0602x8 (16p8R)
*Contents in this sheet are subject to change without prior notice.
Approval sheet
Page 2 of 9 ASC_WA04/06_V15 Oct.2010
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
5. RoHS compliant and lead free products.
APPLICATION
• Consumer electrical equipment
• EDP, Computer application
• Telecom
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 Tin (lead free) alloy.
Fig 1. Consctruction of a Chip-R array (convex Type) Fig 2. Consctruction of a Chip-R array (concave Type)
Approval sheet
Page 3 of 9 ASC_WA04/06_V15 Oct.2010
QUICK REFERENCE DATA
Item General Specification
Series No. WA04Y(Convex)
WA04X(Convex) WA06X(Convex) WA06W(Convex) WA06T(Concave)
Size 0402x2 (1005x2)
0402x4 (1005x4) 0603x4 (1608x4) 0602x8 (1605x8) 0603x4 (1608x4)
Resistance
Tolerance ±5% ±1% ±5% ±1% ±5% ±1% ±5% ±1% ±5%
Resistance
Range 3Ω ~ 1MΩ,
Jumper 10Ω ~ 1MΩ
3Ω ~ 1MΩ
Jumper 10Ω ~ 1MΩ
1Ω ~ 10MΩ
Jumper,
10
Ω ~ 100KΩ
,
10Ω ~ 100KΩ
Jumper, 10Ω ~ 1MΩ,
10Ω ~ 1MΩ,
Jumper
TCR (ppm/°C)
10Ω ≤ R ≤ 1MΩ
R<10Ω, R>1MΩ
≤ ± 300
≤ ± 400
≤ ± 200
-
≤ ± 200
-300~+500
≤ ±100
-
≤ ±200
-300~+500
≤ ±200
-
≤ ± 200
-
≤ ± 200
-
≤ ± 200
-
Max. dissipation
at T
amb
=70°C 1/16 W 1/16 W 1/10 W 1/16 W 1/10 W
Max. Operation
Voltage (DC or
RMS) 25V 50V 50V 50V 50V
Max. overload
voltage 50V 100V 100V 100V 100V
Climatic
category 55/155/56 55/155/56 55/155/56
Note :
1. Climatic category refer to IEC 60068
2. This is the maximum voltage that may be continuously supplied to the resistor element, see “IEC publication
60115-8”
3. 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)
WA04Y
L 1.00 ± 0.10
W 1.00 ± 0.10
T 0.35 ± 0.10
P 0.65 ± 0.10
A 0.34 ± 0.10
Ta 0.20 ± 0.15
Tb 0.25 ± 0.17
T
T
b
W
L
A
T
a
P
Approval sheet
Page 4 of 9 ASC_WA04/06_V15 Oct.2010
WA04X WA06X
L 2.00 ± 0.10 3.20 ± 0.10
W 1.00 ± 0.10 1.60 ± 0.10
T 0.45 ± 0.10 0.50 ± 0.10
P 0.50 ± 0.05 0.80 ± 0.10
A 0.40 ± 0.10 0.60 ± 0.10
B 0.20 ± 0.10 0.30 ± 0.10
C 0.30 ± 0.05 0.40 ± 0.10
G 0.25 ± 0.10 0.30 ± 0.20
WA06W
L 4.00 ± 0.20
W 1.60 ± 0.15
T 0.45 ± 0.10
B 0.30 ± 0.20
G 0.30 ± 0.20
D 0.20 ± 0.10
P 0.50 ± 0.20
H1 0.40 ± 0.20
H2 0.30 ± 0.10
WA06T
L 3.20+0.20/-0.10
W 1.60+0.20/-0.10
T 0.60 ± 0.10
P 0.80 ± 0.10
A 0.60 ± 0.15
B 0.35 ± 0.15
C 0.50 ± 0.15
G 0.50 ± 0.15
Approval sheet
Page 5 of 9 ASC_WA04/06_V15 Oct.2010
MARKING
3-digits marking for E24 series 1% ,5% products
Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance
value. For values up to 9.1 the R is used as a decimal point. For values of 10.0 or greater the first 2 digits
apply to the resistance value and third indicate the number of zeros to follow.
Example
RESISTANCE 4.7Ω 10Ω 100Ω 6800Ω 47000Ω
3-digits marking 4R7 100 101 682 473
No marking for WA04Y chip resistors array and E96 series resistance.
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of ±5%,
The values of the E24 series are in accordance with “IEC publication 60063”
Standard values of nominal resistance are taken from the E24/E96 series for resistors with a tolerance of
±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.3.
Figure 3
Maximum dissipation in percentage of rated power as a
function of the ambient temperature
CONSTRUCTION
R1=R2=R3=R4
Approval sheet
Page 6 of 9 ASC_WA04/06_V15 Oct.2010
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 4.
Fig 4. Infrared soldering profile for Chip Resistors array
Approval sheet
Page 7 of 9 ASC_WA04/06_V15 Oct.2010
TEST AND REQUIREMENTS(JIS C 5201-1 : 1998)
Essentially all tests are carried out according to the schedule of IEC publication 115-8, category
LCT/UCT/56(rated temperature range : Lower Category Temperature, Upper Category Temperature; damp
heat, long term, 56 days). The testing also meets the requirements specified by EIA, EIAJ and JIS.
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 60068-1, subclause 5.3. Unless otherwise specified, the following value supplied :
Temperature: 15°C to 35°C.
Relative humidity: 45% to 75%.
Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar).
All soldering tests are performed with midly activated flux.
REQUIREMENT
TEST PROCEDURE Resistor Jumper
DC resistance
Clause 4.5
DC resistance values measured at the test voltages specified below :
<10Ω@0.1V,<100Ω@0.3V,<1KΩ@1.0V,<10KΩ@3V, <100KΩ@10V,
<1MΩ@25V, <10MΩ@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) t
1
: 20°C+5°C-1°C
R
1
: Resistance at reference temperature
R
2
: Resistance at test temperature
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
ΔR/R max. ±(1%+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 +155°C±3°C, 2~3 minutes at 20°C+5°C-1°C, total 5
continuous cycles
ΔR/R max. ±(1%+0.05Ω)
no visible damage < 50mΩ
Load life (endurance)
Clause 4.25 1000 +48/-0 hours, loaded with RCWV or Vmax in chamber
controller 70±2ºC, 1.5 hours on and 0.5 hours off ΔR/R max.±(3%+0.10Ω)
For 10Ω≤R<1MΩ ;
ΔR/R max.±(5%+0.10Ω)
For R<10Ω, R≥1MΩ
< 50mΩ
Load life in Humidity
Clause 4.24 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
ΔR/R max.±(3%+0.10Ω)
For 10Ω≤R<1MΩ ;
ΔR/R max.±(5%+0.10Ω)
For R<10Ω, R≥1MΩ
< 50mΩ
Adhesion
Clause 4.32 Pressurizing force: 5N, Test time: 10±1sec. No remarkable damage or removal of
the terminations.
Insulation Resistance
Clause 4.6 Apply the maximum overload voltage (DC) for 1minute R≧10GΩ
Dielectric Withstand
Voltage
Clause 4.7
Apply the maximum overload voltage (AC) for 1 minute No breakdown or flashover
Approval sheet
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TEST CONDITION FOR JUMPER (0 Ω
ΩΩ
Ω)
Item WA04Y WA04X WA06X WA06W WA06T
Power Rating At 70°C 1/16W 1/16W 1/10W 1/16W 1/10W
Resistance MAX.50mΩ
MAX.50mΩ
MAX.50mΩ
MAX.50mΩ
MAX.50mΩ
Rated Current 1A 1A 1A 2A 1A
Peak Current 1.5A 1.5A 3A 3A 3A
Operating Temperature -55~155°C -55~155°C -55~155°C -55~155°C -55~155°C
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
WA X XXXX X X L
Size code
06: 0603 (1608)
04:0402(1005)
Type code
X : x 4, Convex
Y : x 2, Convex
W :x 8, Convex
T : x 4, Concave
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
F: ±1%
J : ±5%
P : Jumper
Packaging code
T : 7” Reel taping
B : Bulk
Termination code
L = Sn base (lead
free)
WA06X, WA06T
1. Reeled tape packaging : 8mm width paper taping 5000pcs per reel.
2. Bulk packaging : 5000pcs per polybag
WA06W
1. Reeled tape packaging : 12mm width paper taping 5000pcs per reel.
2. Bulk packaging : 5000pcs per polybag
WA04X, WA04Y
1. Reeled tape packaging : 8mm width paper taping 10,000pcs per reel.
Approval sheet
Page 9 of 9 ASC_WA04/06_V15 Oct.2010
PACKAGING
Paper Tape specifications (unit :mm)
Symbol A B W F E
WA06X,WA06T 3.60±0.20 2.00±0.20
WA04X 2.20±0.20 1.20±0.20 3.50±0.20
WA04Y 1.15±0.10 1.15±0.10
8.00±0.30
3.50±0.05
1.75±0.10
WA06W
2.0 0.0
20.4
+
−
12.0 0.0
80.1
+
−
12.00±0.10 5.50±0.05 1.75±0.10
Symbol P1 P0 ΦD T
WA06X,WA06T 4.00±0.10 Max. 1.0
WA04X Max. 0.6
WA04Y 2.00±0.05
1.0 0.0
50.1
+
−
Φ
0.45±0.05
WA06W 4.00±0.10
4.00±0.10
∅D1.55±0.05
0.80±0.05
Reel dimensions
Symbol A B C D
WA06X,WA04Y,WA04X,WA06T
Φ178.0±2.0 Φ60.0±1.0 13.0±0.2 9.0±0.5
WA06W Φ178.0±2.0 Φ60.0±1.0 13.0±0.2 12.4±1.0
