POE International Corp
SPECIFICATION OF HIGH POWER CHIP RESISTOR
M01-00-E-07
Ver: 1
Page:
1 of 7
ROHS compliance
WF06P
±5%
High power chip resistors
Size 0603, 1/8watt
Customer
:
Approval No :
Issue Date
:
Customer Approval :
POE International Corp
SPECIFICATION OF HIGH POWER CHIP RESISTOR
M01-00-E-07
Ver: 1
Page:
2 of 7
FEATURE
1. High rated power 1/8 watt
2. High reliability and stability
3. Reduced size of final equipment
4. Lower assembly costs
5. Higher component and equipment reliability
6. Lead free termination upon customer requested
APPLICATION
•
•
•
•
Consumer electrical equipment
Automotive application
EDP, Computer application
Telecom application
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
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 Lead-tin or Tin (lead free) solder alloy.
Fig 1. Consctruction of a Chip-R
POE International Corp
SPECIFICATION OF HIGH POWER CHIP RESISTOR
M01-00-E-07
Ver: 1
Page:
3 of 7
QUICK REFERENCE DATA
Item
Series No.
Size code
Resistance Tolerance
Resistance Range
TCR (ppm/°C)
10Ω
≤
R
≤
1MΩ
<10Ω, or > 1MΩ
Max. dissipation at T
amb
=70°C
Max. Operation Voltage (DC or RMS)
Max. Overload Voltage (DC or RMS)
Climatic category (IEC 60068)
Note :
1.
2.
This is the maximum voltage that may be continuously supplied to the resistor element, see
“IEC
publication
60115-8”
Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by
RCWV
=
Rated Power
×
Resistance Value or Max. RCWV listed above, whichever is lower.
≤ ±
200 ppm/°C
-300~+500 ppm/°C
1/8 W
50V
100V
55/125/56
General Specification
WF06P
0603 (1608)
±5%
(E24 series);
±1%
(E96 series)
1Ω ~ 10MΩ (
±5%
); 10Ω ~ 1MΩ (
±1%
)
Dimensions
WF06P
L
W
T
Tb
Tt
1.60
±
0.10
0.80
±
0.10
0.45
±
0.15
0.30
±
0.20
0.30
±
0.10
POE International Corp
SPECIFICATION OF HIGH POWER CHIP RESISTOR
M01-00-E-07
Ver: 1
Page:
4 of 7
MAARKING
3-digits marking
Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance
value.
For values up to 910Ω the R is used as a decimal point. For values of 1KΩ or greater the first 3 digits apply
to the resistance value and fourth indicate the number of zeros to follow.
Example
RESISTANCE
3-digits marking
10Ω
100
12Ω
120
100Ω
101
6800Ω
682
47000Ω
473
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
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.
POE International Corp
SPECIFICATION OF HIGH POWER CHIP RESISTOR
M01-00-E-07
Ver: 1
Page:
5 of 7
SOLDERING CONDITION
The robust construction of chip resistors
allows them to be completely immersed in
a solder bath of 270°C for one minute.
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 270°C
for 60 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 .
WF06
Size code
WF06 : 0603
Type code
P : High power type
(1/8watt for 0603)
P
472_
Resistance code
E24 : 2 significant digits
followed by no. of zeros
and a blank
4.7Ω
10Ω
220Ω
Jumper
=4R7_
=100_
=221_
=000_
J
Tolerance
J :
±5%
F :
±1%
T
Packaging code
T : 7” Reeled taping
_
Termination code
_ = SnPb base (“_”
means a blank)
L
=
Sn base (lead free)
(“_” means a blank)
n
Reeled tape packaging
: 8mm width paper taping 5,000pcs per 7” reel.
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.
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