WR25W100_JTL [WALSIN]
Thick Film Power Chip Resistors;型号: | WR25W100_JTL |
厂家: | Walsin Technology |
描述: | Thick Film Power Chip Resistors |
文件: | 总7页 (文件大小:608K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Approval sheet
WR18X(W), WR20X(W), WR25X(W)
1%, 5%
Thick Film Power Chip Resistors
Size 1218,2010,2512
*Contents in this sheet are subject to change without prior notice.
WR18-20-25X(W)_V17 DEC - 2016
Page 1 of 7
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 Lead free products
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. For
ease of soldering the outer layer of these end terminations is Tin (lead free) alloy.
Fig 1. Construction of 2512, 2010 Chip-R
Fig 2. Construction of a 1218 Chip-R
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Approval sheet
QUICK REFERENCE DATA
Item
Series No.
General Specification
WR20X(W)
WR18X(W)
1218(3248)
WR25X(W)
2512(6432)
Size code
2010 ( 5025 ),
Resistance Tolerance
Resistance Range
5% (E24); 1% (E24+E96)
1 ~ 10M, Jumper (0)
100 ppm/C
TCR (ppm/C) : 10< Rn 10M
1 Rn 10
100 ppm/C
200 ppm/C
100 ppm/C
200 ppm/C
200 ppm/C
1W
0.75 W
200V
1W
Max. dissipation at Tamb=70C
Max. Operation Voltage (DC or RMS)
Max. Overload Voltage (DC or RMS)
Operation temperature
200V
400V
250V
500V
400V
-55 ~ +155’C
5 ~ 40’C
Storage temperature
Test conditions for jumper ( 0 ohm )
Type
WR18X(W)
1 W
WR20X(W)
WR25X(W)
1 W
Power Rating At 70C
Resistance
3/4 W
Max. 50mR
3.8 A
Max. 50mR
4.5 A
Max. 50mR
4.5 A
Rated Current
Peak Current
11 A
9 A
11 A
Operating Temperature
-55C ~ 155C
-55C ~ 155C
-55C ~ 155C
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.
3.
4.
Max. Operation Current : So called RCWC (Rated Continuous Working Current) is determined by
RCWC Rated Power/ Resistance Value
MECHANICAL DATA (unit : mm)
TYPE
WR18
WR20
WR25
L
3.050.15
4.600.20
0.550.10
0.450.25
0.500.25
5.000.20
2.500.20
0.550.10
0.650.25
0.600.25
6.400.20
3.200.20
0.600.10
0.650.25
0.900.25
W
T
Tt
Tb
Page 3 of 7
WR18-20-25X(W)_V17
DEC - 2016
Approval sheet
MARKING
Each resistor is marked with a four-digit code on the protective coating to designate the nominal resistance
value.
Example:
1R00 = 1
1001 = 1000
0000 = 0
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.
Page 4 of 7
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Approval sheet
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 below.
3-5 sec
The resistors have a catalogue number starting with .
WR20
X
472_
Resistance code
J
T
L
Size code
Type code
X :
Tolerance
J : 5%
Packaging code
T : 7” Reel taping
(T:1218 10” Reel)
Q : 10” Reel taping
G : 13” Reel taping
Termination code
WR25 : 2512
WR20 : 2010
WR18: 1218
5% E24 : 2 significant digits
followed by no. of zeros and
a blank
L
= Sn base (lead
free)
5%: 1-10M
1%: 10-1M
W :
F : 1%
P : Jumper
4.7
10
=4R7_
=100_
1% : <10 or
>1M
1% E24+E96: 3 significant digits
followed by no. of zeros
102
=1020
=3742
37.4K
Page 5 of 7
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Approval sheet
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.
REQUIREMENT
TEST
PROCEDURE
DC resistance
DC resistance values measured at the test voltages specified below : Within the specified
tolerance
Clause 4.5
<10@0.1V,<100@0.3V, <1K@1.0V, <10K@3V,
<100K@10V, <1M@25V, <10M@30V
Temperature
Natural resistance change per change in degree centigrade.
Refer to
Coefficient of
Resistance(T.C.R)
“QUICK REFERENCE
DATA”
R2 R
106 (ppm/C) t1 : 20°C+5°C-1°C
1
R
1t2 t1
Clause 4.8
R1 : Resistance at reference temperature
R2 : Resistance at test temperature
R/R max. ±(2%+0.1)
Short time overload
(S.T.O.L) Clause
Clause 4.13
Permanent resistance change after a 5second application of a voltage
2.5 times RCWV or the maximum overload voltage specified in the
above list, whichever is less.
Resistance to
soldering heat(R.S.H)
Clause 4.18
Un-mounted chips completely immersed for 10±1second in a SAC
solder bath at 260℃±5ºC
no visible damage
R/R max. ±(1%+0.05)
Un-mounted chips completely immersed for 2±0.5 second in a SAC good tinning (>95%
Solderability
solder bath at 235℃±5℃
covered)
Clause 4.17
no visible damage
Temperature cycling
30 minutes at -55C3C, 2~3 minutes at 20°C+5°C-1°C, 30 minutes no visible damage
at +155C3C, 2~3 minutes at 20°C+5°C-1°C, total 5 continuous
R/R max. ±(1%+0.05)
Clause 4.19
cycles
1000 +48/-0 hours, loaded with RCWV or Vmax in chamber controller
70±2ºC, 1.5 hours on and 0.5 hours off
R/R max. (3%+0.1)
Load life (endurance)
Clause 4.25
1000 +48/-0 hours, loaded with RCWV or Vmax in humidity chamber
controller at 40C2C and 90~95% relative humidity, 1.5hours on and
0.5 hours off
R/R max. (3%+0.1)
R/R max. ±(1%+0.05)
Load life in Humidity
Clause 4.24
Bending strength
Clause 4.33
Adhesion
Resistors mounted on a 90mm glass epoxy resin PCB(FR4);
bending : 2 mm, once for 10 seconds
Pressurizing force: 5N, Test time: 10±1sec.
No remarkable damage or
removal of the terminations
Clause 4.32
Insulation Resistance
R≧10GΩ
Apply the maximum overload voltage (DC) for 1minute
Apply the maximum overload voltage (AC) for 1 minute
Clause 4.6
Dielectric Withstand
No breakdown or flashover
Voltage
Clause 4.7
Page 6 of 7
WR18-20-25X(W)_V17
DEC - 2016
Approval sheet
PACKAGING
Plastic Tape specifications (unit :mm)
Type
WR18
WR20
WR25
A
B
W
F
E
4.90±0.20
5.50±0.20
6.90±0.20
3.55±0.30
2.80±0.20
3.60±0.20
12.00±0.30
5.50±0.10
1.75±0.10
Type
WR18
WR20
WR25
P1
P0
T
D
8.00±0.10
1.30±0.20
0.1
0.0
4.00±0.10
1.50
4.00±0.10
MAX1.2
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
WR20, WR25 by plastic tape taping 4,000 pcs per 7” reel; 8,000pcs per 10” reel; 16,000pcs per 13” reel !
WR18 by plastic tape taping 3,000 pcs per 10” reel
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