WF20N1004FTL [WALSIN]
Special materials and design for higher working voltage required;型号: | WF20N1004FTL |
厂家: | Walsin Technology |
描述: | Special materials and design for higher working voltage required |
文件: | 总9页 (文件大小:524K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
WF25N, WF20N, WF12N, WF08N, WF06N
1%, 5%
Thick Film High Voltage Chip Resistors
UL Safety Certification
Size 2512,2010,1206, 0805, 0603
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FEATURE
1. Special materials and design for higher working voltage required.
2. Compatible with flow and reflow soldering.
3. Suitable for lead free soldering.
4. Max. Voltage coefficient resistance below 300ppm.
5. RoHS compliant & Halogen Free.
6. Safety resistor certificate meet:
-
UL/IEC 60950-1 2.5 kV impulse.
-
UL/IEC 60065 10 kV impulse.
APPLICATION
Power supply
Measurement instrument
Back light inverter
Medical or Military equipment
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. For
ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy.
Fig 1. Construction of Chip-R
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QUICK REFERENCE DATA
WF06N
WF08N
WF12N
WF20N
WF25N
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
WF25N
WF 20N
WF12N
WF08N
WF06N
Symbol
L
6.40
0.20
5.00
0.20
3.10
0.10
2.00
0.10
1.60
0.10
W
T
3.20
2.50
1.60
1.25
0.80
0.20
0.20
0.10
0.10
0.10
0.60
0.15
0.60
0.10
0.55
0.10
0.50
0.10
0.45
0.10
Tt
Tb
0.65
0.65
0.50
0.40
0.30
0.25
0.25
0.20
0.20
0.20
105
0.90
0.25
0.60
0.25
0.50
0.20
0.40
0.20
0.30
0.20
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MARKING
For E24 5% series, each resistor is marked with a three–digit code on the protective coating to designate
the nominal resistance value.
For E24/E96 1% series, each resistor is marked with a four–digit code on the protective coating to
designate the nominal resistance value. 0603 is marked with three-digits.
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24/E96 series for resistors with a tolerance of
1%, 5%. The values of the E24/E96 series are in accordance with “IEC publication 60063”.
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Derating curve
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
WF06N
WF08N
WF12N
WF20N
WF25N
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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 3.
Fig 3. Infrared soldering profile
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
WF25
N
105
J
T
L
Size code
Type code
Resistance code
Tolerance
J : 5%
F : 1%
Packaging code
T : 7” inch reel
Termination
code
WF25 : 2512
WF20 : 2010
WF12 : 1206
WF08 : 0805
WF06 : 0603
N :High Voltage
UL certified
5% E24: 2 significant digits
followed by no. of zeros
and a blank
L
= Sn base
0603/0805/1206:
paper tape,
(lead free)
5kpcs/reel
1 M
= 105
2010,2512 :
plastic tape,
4kpcs/reel
1%, E24+E96: 3 significant
digits followed by no. of
zeros
1 M
= 1004
Tape packaging WF12, WF08, WF06 : 8mm width paper taping 5,000pcs per reel.
WF25;WF20: 12mm width plastic taping 4,000pcs per reel.
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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.
TEST
PROCEDURE
REQUIREMENT
Temperature Coefficient
of Resistance(T.C.R)
Natural resistance change per change in degree centigrade. Refer to
“QUICK REFERENCE DATA”
R2 R
106 (ppm/C)
1
Clause 4.8
R
1t2 t1
R1 : Resistance at reference temperature
R2 : Resistance at test temperature
t1 : 20°C+5°C-1°C
Short time overload
(S.T.O.L)
Permanent resistance change after a 5 second application of No visible damage
5 times of rated power.
J: R/R max. (2%+0.1)
Clause 4.13
F: R/R max. (1%+0.1)
no visible damage
Un-mounted chips completely immersed for 10±1second in a
SAC solder bath at 260℃±5ºC
Resistance to soldering
heat(R.S.H)
R/R max. ±(1%+0.15)
Clause 4.18
Solderability
Clause 4.17
Un-mounted chips completely immersed for 3±0.5second in
a SAC solder bath at 245℃±5℃
good tinning (>95% covered)
no visible damage
Temperature cycling
30 minutes at -55C3C, 2~3 minutes at 20°C+5°C-1°C, 30
minutes at +155C3C, 2~3 minutes at 20°C+5°C-1°C, total
5 continuous cycles
no visible damage
Clause 4.19
R/R max. ±(1%+0.1)
Load life (endurance)
1000 +48/-0 hours, loaded with RCWV or Vmax in chamber no visible damage
controller 70±2ºC, 1.5 hours on and 0.5 hours off
Clause 4.25
J: R/R max. (3%+0.1)
F: R/R max. (1%+0.1)
1000 +48/-0 hours, loaded with RCWV or Vmax in humidity no visible damage
Load life in Humidity
chamber controller at 40C2C and 95% relative humidity,
Clause 4.24
J: R/R max. (3%+0.1)
F: R/R max. (1%+0.1)
R/R max. ±(0.5%+0.05)
1.5hours on and 0.5 hours off
Resistors mounted on a 90mm glass epoxy resin
PCB(FR4),
Bending strength
Clause 4.33
2512, 2010, 1206 bending : 2 mm once for 10 seconds
0805, 0603 bending: 3mm once for 10 seconds
Apply voltage 100+/-15V for 1minute
Insulation Resistance
R≧1GΩ
Clause 4.6
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PACKAGING
Paper Tape specifications (unit :mm)
Series No.
WF25N
A
B
W
F
E
6.70±0.20
3.50±0.20
12.00±0.30
5.50±0.10
1.75±0.10
5.50±0.20
3.60±0.20
2.40±0.20
1.90±0.20
P1
2.80±0.20
2.00±0.20
1.65±0.20
1.10±0.20
P0
WF20N
WF12N
WF08N
8.00±0.30
8.00±0.30
8.00±0.30
D
3.50±0.20
3.50±0.20
3.50±0.20
T
1.75±0.10
1.75±0.10
1.75±0.10
WF06N
Series No.
WF25N
Max. 1.2
WF20N
0.1
0.0
WF12N
4.00±0.10
4.00±0.10
1.50
Max. 1.0
WF08N
0.65±0.10
WF06N
Reel dimensions
(unit : mm)
Reel / Tape
A
B
C
D
7” reel for 12mm tape
12.4±1.0
13.0±0.2
178.0±2.0
60.0±1.0
7” reel for 8mm tape
9.0±0.5
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