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Walsin Technology Corporation
WA04X 5%, Convex Type General purpose chip resistors array Size 0402x4
Customer : Approval No : Issue Date : Customer Approval :
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WA04X
Version 18
Nov.-2006
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Walsin Technology Corporation
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. Lead (Pb) free product is available
APPLICATION
* * * Consumer electrical equipment, PDA, Digital Camcoder, ... EDP, Computer application Mobile phone, 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 a Lead-tin or Tin (Lead free) solder alloy.
Fig 1. Consctruction of a Chip-R array WA04
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WA04X
Version 18
Nov.-2006
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Walsin Technology Corporation
QUICK REFERENCE DATA
Item
Series No. Size Resistance Tolerance Resistance Range TCR (ppm/C) 10R<1M R<10, R>1M Max. dissipation at Tamb=70C Max. Operation Voltage (DC or RMS) Max. overload voltage Climatic category
General Specification
WA04X(Convex) 0402x4 (1005x4) 5% 10 ~ 1M Jumper 300 -300~+500 1/16 W 25V 50V 55/155/56
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
RCWV = Rated Power x Resistance Value or Max. RCWV listed above, whichever is lower.
DIMENSIONS
WA04X L W T P A B C G
2.00 0.10 1.00 0.10 0.45 0.10 0.50 0.05 0.40 0.10 0.20 0.10 0.30 0.05 0.25 0.10
CONSTRUCTION
R1=R2=R3=R4
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WA04X
Version 18
Nov.-2006
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Walsin Technology Corporation
MARKING
3-digits marking Each resistor is marked with three digits on the protective coating to designate the nominal resistance value. For values below 100 the 0 is used as a final digit. For values of 1K or greater the first 2 digits apply to the resistance value and 3rd digit indicates the multiple number of zero.
Example
RESISTANCE 3-digits marking
10 100
12 120
100 101
6800 682
47000 473
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"
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
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WA04X
Version 18
Nov.-2006
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Walsin Technology Corporation
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
WA04
Size code WA04 : 0402 per element
X
Type code X : x4, convex
472_
Resistance code E24 : 2 significant digits followed by no. of zeros and a blank 10 220 Jumper =100_ =221_ =000_
J
Tolerance J : 5% P : Jumper
T
Packaging code T : 7" Reel taping
_
Termination code _ = SnPb base ("_" means a blank) L = Sn base (lead free)
("_" means a blank)
1.
Reeled tape packaging : 8mm width paper taping 10,000pcs per reel.
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 260C 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 235C during 2 seconds. The test condition for no leaching is 260C 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 array
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WA04X
Version 18
Nov.-2006
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Walsin Technology Corporation
TEST CONDITION FOR JUMPER (0 )
Item Power Rating At 70C Resistance Rated Current Peak Current Operating Temperature WA04X 1/16W MAX. 50m 1A 1.5A -55~155C
TEST AND REQUIREMENTS(JIS C 5201-1 : 1998)
TEST DC resistance Clause 4.5 PROCEDURE REQUIREMENT Resistor Jumper < 50m
DC resistance values measured at the test voltages specified below : Within the specified <100K@10V, tolerance <10@0.1V,<100@0.3V,<1K@1.0V,<10K@3V, <1M@25V, <10M@30V
Temperature Coefficient of Natural resistance change per change in degree centigrade. Resistance (T.C.R) R2 - R1 x 106 (ppm/C) t1 : 20C+5C-1C Clause 4.8
Refer to N/a "QUICK REFERENCE DATA"
R1 (t2 - t1 )
R1 : Resistance at reference temperature R2 : Resistance at test temperature
Short time overload (S.T.O.L) Clause 4.13 Resistance to Soldering Heat (R.S.H) Clause 4.18 Solderability Clause4.17 Leaching Test Clause 4.18 Temperature cycling Clause 4.19 Load life (endurance) Clause 4.25
Permanent resistance change after a 5second application of a R/R max. (2%+0.10) voltage 2.5 times RCWV or the maximum overload voltage specified in the above list, whichever is less. R/R max. (1%+0.05 ) Un-mounted chips completely immersed for 101second in a solder bath at 270 5C no visible damage Un-mounted chips completely immersed for 20.5second in a solder good tinning (>95% covered) bath at 235 5 no visible damage Un-mounted chips completely immersed for 60 1second in a solder Ditto bath at 260 5 R/R max. (1%+0.05 ) 30 minutes at -55C3C, 2~3 minutes at 20C+5C-1C, 30 minutes at +155C3C, 2~3 minutes at 20C+5C-1C, total 5 continuous no visible damage cycles R/R max. (3%+0.10 ) 702C, 1000 hours, loaded with RCWV or Vmax,1.5 hours on and 0.5 hours off For 10R<1M ; R/R max. (5%+0.10 ) 1000 hours, at rated continuous working voltage in humidity chamber controller at 40C2C and 90~95% relative humidity, 1.5hours on and 0.5 hours off Pressurizing force: 5N, Test time: 10 1sec. For R<10, R1M R/R max. (3%+0.10 ) For 10R<1M ; R/R max. (5%+0.10 ) For R<10, R1M
< 50m
< 50m
< 50m
< 50m
Load life in Humidity Clause 4.24
< 50m
Adhesion Clause 4.32
No remarkable damage or removal of the terminations.
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WA04X
Version 18
Nov.-2006
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Walsin Technology Corporation
PACKAGING
Paper Tape specifications (unit :mm)
Series No. WA04X
A 2.200.20
B 1.200.20
W 8.000.30
F 3.500.20
E 1.750.10
Series No. WA04X
P1 2.000.05
P0 4.000.10
D
T Max. 0.6
1.50 +0..1 -0 0
Reel dimensions
Symbol (unit : mm)
A 178.02.0
B 60.01.0
C 13.00.2
D 9.00.5
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WA04X
Version 18
Nov.-2006

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