WK06M427_YTL [WALSIN]
Reduced size of final equipment;型号: | WK06M427_YTL |
厂家: | Walsin Technology |
描述: | Reduced size of final equipment |
文件: | 总10页 (文件大小:608K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
WK12M / WK08M / WK06M
0/-20%, 0/-30%
Trimmable chip resistors
Size 1206, 0805, 0603,
Customer
:
Approval No :
Issue Date :
Customer Approval :
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WKxxM Trimmable
Ver.2
July 2017
FEATURE
1. Reduced size of final equipment
2. Lower assembly costs
3. Higher component and equipment reliability
4. Improved performance at high frequency
5. Low noise, when not trimmed
6. RoHS compliant and Lead free termination
APPLICATION
Consumer electrical equipment
Automotive application
EDP, Computer application
Telecom application
DESCRIPTION
The resistors are constructed on a high-grade ceramic body (aluminum oxide). Internal metal electrodes are
added at each and connected by a resistive paste, which is applied to the substrate. The composition of the
paste is adjusted to give the approximate resistance required.
The resistive layer is covered with a transparent protective coating. Finally the two external end terminations are
added. For case of soldering the outer of theses end terminations is a Tin (lead free) alloy.
Fig 1. Construction of Trimmable Chip-R
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WKxxM Trimmable
Ver.2
July 2017
QUICK REFERENCE DATA
Item
General Specification
WK08M
Series No.
WK12M
WK06M
Size code
1206 (3216)
0805 (2012)
1 ~ 4.7M
0603 (1608)
Resistance Range
Tolerance
1 ~ 4.7M
10 ~ 4.7M
0/-20% and 0/-30% (E24 series)
TCR (ppm/C)
10
200 ppm/C
-200~+500 ppm/C
1/8 W
200 ppm/C
-200~+500 ppm/C
1/10W
200 ppm/C
<10
Max. dissipation at Tamb=70C
Max. Operation Voltage (DC or RMS)
Climatic category (IEC 60068)
1/16W
50V
200V
150V
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
RCWV RatedPowerResistance Valueor Max. RCWV listed above, whichever is lower.
Dimensions
WK12M
L
W
T
3.20 0.15
1.60 0.15
0.55 0.10
1.30 0.10
0.50 0.25
Tb
Tt
WK08M
WK06M
L
W
T
2.00 0.10
1.25 0.10
0.55 0.10
0.66 0.10
0.40 0.20
1.60 0.10
0.80 0.10
0.45 0.10
0.30 0.10
0.30 0.10
Tb
Tt
MARKING
No marking for Trimmable Chip Resistor
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WKxxM Trimmable
Ver.2
July 2017
TRIMMING INTRODUCTIONS
Typical value for a YAG-laser;
cutting speed
laser power
bite size
: 10-200 mm/sec,
: 1-6 Watt,
: 3~10m ( = speed / Q_rate , Bite Size is the distance each laser spot moving and
influence the trimming accuracy)
maximum trimming length : 60% of resistive film width, minimum distance from end termination to trimming
cut : 0.20mm, minimum distance between cuts (double-cut) : 0.5mm
Protection of the laser cut
by epoxy-fenol lacquers, epoxy resins or silicon alkyd-resins.
This is necessary for humidity test and stability under loaded.
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of 0/-20%,
and 0/-30%. 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
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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WKxxM Trimmable
Ver.2
July 2017
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 3.
Fig 3. Infrared soldering profile for Chip Resistors
CATALOGUE NUMBERS
The resistors have a catalogue number starting with :
WK12
M
472_
X
T
L
Size code
Type code
Resistance code
Tolerance
Packaging code
Termination code
WK12 : 1206 M : Trimmable
WK08 : 0805
E24 :
2
significant digits X : 0/-30%
T
B
: 7” Reeled taping
L
= Sn base (lead
free)
followed by no. of
zeros and a blank
Y : 0/-20%
: Bulk
WK06 : 0603
4.7
10
=4R7_
=100_
=221_
220
(“_” means a blank)
Reeled tape packaging : WK12M / WK08M / WK06M - 8mm width paper taping 5000pcs per reel.
Bulk packaging : WK12M / WK08M / WK06M - 5000pcs per poly bag
1.
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WKxxM Trimmable
Ver.2
July 2017
TEST AND REQUIREMENTS (JIS C 5201-1 : 1998)
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WKxxM Trimmable
Ver.2
July 2017
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WKxxM Trimmable
Ver.2
July 2017
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WKxxM Trimmable
Ver.2
July 2017
Page 9 of 10
WKxxM Trimmable
Ver.2
July 2017
PACKAGING
Paper Tape specifications (unit :mm)
Series No.
WK12M
WK08M
WK06M
A
B
W
F
E
3.60±0.20
2.50±0.20
1.90±0.20
2.00±0.15
1.65±0.15
1.15±0.15
8.00±0.20
3.50±0.05
1.75±0.10
Series No.
WK12M / WK08M
WK06M
P1
P0
T
D
Max. 1.0
Max. 0.8
4.0±0.10
4.0±0.10
1.50+0.10
Reel dimensions
Symbol (unit : mm)
WK12M / WK08M / WK06M
A
B
C
D
13.0±0.2
9.0+1.0
180-1.5
60.0+1.0
Page 10 of 10
WKxxM Trimmable
Ver.2
July 2017
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