WA02A472-FTL [WALSIN]
Higher component and equipment reliability;型号: | WA02A472-FTL |
厂家: | Walsin Technology |
描述: | Higher component and equipment reliability |
文件: | 总7页 (文件大小:227K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Approval sheet
WA02B
±5%, ±1%
Thick film
General purpose chip resistors array
Size 0201x2 Flat Type
*Contents in this sheet are subject to change without prior notice.
ASC_WA02B_V02 Jan - 2013
Page 1 of 7
Approval sheet
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 free / Halogen free
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 WA02B
Page 2 of 7
ASC_WA02B_V02
Jan - 2013
Approval sheet
QUICK REFERENCE DATA
Item
Series No.
General Specification
WA02B
0201x2 (0603x2)
Flat type
Size
Termination construction
Resistance Tolerance
Resistance Range
±5%, ±1% (E24 series)
±5%: 10Ω ~ 1MΩ, Jumper (< 50mΩ)
±1%: 10Ω ~ 100KΩ
10Ω ~ 29.5Ω: ≤ ± 350 ppm/°C
30Ω ~ 1MΩ: ≤ ± 200 ppm/°C
1/32 W
TCR (ppm/°C)
Max. dissipation at Tamb=70°C
Max. Operation Voltage (DC or RMS)
Max. overload voltage
12.5V
25V
Rated current for Jumper
Operation temperature
1A
-55 ~ +125’C
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
RCWV = RatedPower ×Resistance Value or Max. RCWV listed above, whichever is lower.
DIMENSIONS(unit:mm)
WA02B
L
W
T
0.80 ± 0.10
0.60 ± 0.10
0.35 ± 0.10
0.50 typical
0.30 ± 0.10
0.15 ± 0.10
0.15 ± 0.10
P
A1
C
D
Page 3 of 7
ASC_WA02B_V02
Jan - 2013
Approval sheet
MARKING
No marking for WA02B 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.
Page 4 of 7
ASC_WA02B_V02
Jan - 2013
Approval sheet
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
Size code
WA02 : 0201
B
472_
Resistance code
5% E24 : significant digits
J
T
L
Type code
Tolerance
J : ±5%
Packaging code Termination code
B
: x2, Flat
2
T :
L
= Sn base
(lead free)
followed by no. of zeros and
a blank
7” 10kpcs Reel
taping
F : ±1%
P : Jumper
4.7Ω
=4R7_
=100_
=221_
=000_
10Ω
220Ω
Jumper
(“_” means a blank)
1%, E24+E96: 3 significant digits
followed by no. of zeros
100Ω
=1000
=3742
37.4KΩ
Reeled tape packaging
: 8mm width paper taping 7” reel 10,000pcs per reel,
Recommended Land Pattern Dimensions:
Page 5 of 7
ASC_WA02B_V02
Jan - 2013
Approval sheet
TEST AND REQUIREMENTS
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
Within the specified
tolerance Refer to
“QUICK REFERENCE
DATA”
Jumper
Electrical
-
-
DC resistance values measurement
Characteristics
Temperature Coefficient of Resistance (T.C.R)
Natural resistance change per change in degree
centigrade.
JISC5201-1: 1998
N/a
R2 − R
Clause 4.8
×106 (ppm/°C) t1 : 20°C+5°C-1°C
1
R
(
t2 − t1
)
1
R1 : Resistance at reference temperature
R2 : Resistance at test temperature
Short time overload
(S.T.O.L)
Permanent resistance change after a 5 seconds
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
< 50mΩ
Clause 4.13
Resistance to soldering Un-mounted chips completely immersed for
heat(R.S.H)
ΔR/R max. ±(1%+0.05Ω)
10±1second in a SAC solder bath at 260℃±5ºC
no visible damage
Clause 4.18
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
Solderability
Clause 4.17
Temperature cycling
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
ΔR/R max. ±(1%+0.05Ω)
no visible damage
Clause 4.19
< 50mΩ
< 100mΩ
< 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
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%+0.1Ω)
no visible damage
Load life in Humidity
Clause 4.24
ΔR/R max. ±(3%+0.1Ω)
no visible damage
Adhesion
Clause 4.32
No remarkable damage or removal of
the terminations.
Pressurizing force: 5N, Test time: 10±1sec.
Bending strength
JISC5201-1: 1998
Clause 4.33
Resistors mounted on a 90mm glass epoxy resin
PCB(FR4), bending once 3mm for 10sec.
ΔR/R max. ±(1%+0.05Ω)
no visible damage
< 50mΩ
Insulation Resistance
Clause 4.6
Apply the maximum overload voltage (DC) for
1minute
R≧1GΩ
Dielectric Withstand
Voltage
Apply the maximum overload voltage (AC) for 1
minute
No breakdown or flashover
Clause 4.7
Page 6 of 7
ASC_WA02B_V02
Jan - 2013
Approval sheet
PACKAGING
Paper Tape specifications (unit: mm)
Reel dimensions
Symbol
A
B
C
D
(unit : mm)
13.0 ± 0.2
9.0 ± 0.3
Φ178.0 ± 2.0
Φ60.0 ± 1.0
Peeling force of top cover tape
Taping Qty
10,000pieces per 7” reel
Page 7 of 7
ASC_WA02B_V02
Jan - 2013
相关型号:
©2020 ICPDF网 联系我们和版权申明