WK20L100_JTLV [WALSIN]
High power rating and compact size;型号: | WK20L100_JTLV |
厂家: | Walsin Technology |
描述: | High power rating and compact size |
文件: | 总8页 (文件大小:478K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Approval sheet
WK12L, WK20L, WK25L
1%, 5%
Thick Film Power Chip Resistor
Wide Termination
RoHS compliant and Halogen free
Size 0612, 1020, 1225
Automotive AEC Q200 Compliant
ASTM B-809-95 Compliant
*Contents in this sheet are subject to change without prior notice.
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Approval sheet
FEATURE
1. High power rating and compact size
2. High reliability and stability
3. Reduced size of final equipment
4. RoHS compliant and Halogen free products
5. AEC Q200 Compliant
6. ASTM B-809-95 60’C 1000hrs compliant
APPLICATION
Power supply
PDA
Digital meter
Computer
Automotives
Battery charger
DC-DC power converter
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 at
longer sides. For ease of soldering the outer layer of these end terminations is Tin (lead free) alloy.
Fig 2. Construction of Chip-R
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QUICK REFERENCE DATA
Item
Series No.
General Specification
WK20L
WK12L
WK25L
Size code
0612(1632)
1020 ( 2550 ),
1225(3264)
Resistance Tolerance
Resistance Range
5% (E24); 1% (E24+E96)
1 ~ 1M,
TCR (ppm/C) :
200 ppm/C
200 ppm/C
200 ppm/C
3/4W
200V
400V
1 W
200V
2W
Max. dissipation at Tamb=70C
Max. Operation Voltage (DC or RMS)
Max. Overload Voltage (DC or RMS)
Climatic category (IEC 60068)
200V
400V
400V
55/155/56
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
RCWV RatedPowerResistance Value or Max. RCWV listed above, whichever is lower.
MECHANICAL DATA (unit : mm)
TYPE
WK12L
WK20L
WK25L
W
L
3.200.20
1.600.20
0.550.10
0.500.25
0.500.25
5.000.20
2.500.15
0.550.10
0.600.20
0.600.20
6.300.20
3.200.20
0.550.10
0.600.20
0.600.20
H
c
d
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MARKING
Each resistor is marked with a four-digit code on the protective coating to designate the nominal resistance
value.
Example:
1R00 = 1
3901 = 3900
1101 = 1100
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E96 & E24 series for resistors with a tolerance of
5% & 1%. The values of the E24/E96 series are in accordance with “IEC publication 60063”.
Derating curve
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.
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.
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SOLDERING CONDITION
The robust construction of chip resistors allows
them to be completely immersed in a solder
bath of 260C 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 235C during 2 seconds. The
test condition for no leaching is 260C 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
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
WK12
L
472_
J
T
L
V
Size code
Type code
Resistance code
Tolerance
J : 5%
Packaging code Termination
Special code
code
WK25 : 1225
WK20 : 1020
WK12: 0612
L : wide
termination
T : 7” Reel
5% E24 : 2 significant
digits followed by no.
of zeros and a blank
V = AEC Q200
Compliant +
taping
L
= Sn base
F : 1%
ASTM B-809-
95 Compliant
(lead free)
P : Jumper
4.7
10
=4R7_
=100_
1% E24+E96: 3 significant
digits followed by no.
of zeros
102
=1020
=3742
37.4K
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TEST AND REQUIREMENTS ( AEC Q200 )
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PACKAGING
Tape specifications (unit :mm)
Type
A
B
W
F
E
WK12L
WK20L
WK25L
3.60±0.20
5.50±0.20
6.90±0.20
2.00±0.15
3.10±0.20
3.60±0.20
8.00±0.30
12.00±0.30
12.00±0.30
3.50±0.10
5.50±0.10
5.50±0.10
1.75±0.10
Type
P1
P0
T
D
WK12L
WK20L
WK25L
Max 1.0
0.1
0.0
4.00±0.10
4.00±0.10
1.50
1.10±0.15
Reel dimensions
(unit : mm)
Symbol
A
B
C
D
7” Reel
10” Reel
13” Reel
13.0±0.2
13.0±0.2
13.0±0.2
12.4.0±1.00
14.0±0.20
14.0±0.20
178.0±2.0
254.0±2.0
330.0±2.0
60.0±1.0
100.0±1.0
100.0±1.0
Taping quantity
WK20L, WK25L by plastic tape taping 4,000 pcs per 7” reel!
WK12L by paper tape taping 5,000 pcs per 7” reel!
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