POE International Corp
M01-00-E-07
SPECIFICATION OF GENERAL PURPOSE CHIP RESISTOR
Ver: 1
Page: 1 of 7
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WR10X
±1%, ±5%
General purpose chip resistors
Size 1210
Customer :
Approval No :
Issue Date :
Customer Approval :
POE International Corp
M01-00-E-07
SPECIFICATION OF GENERAL PURPOSE CHIP RESISTOR
Ver: 1
Page: 2 of 7
FEATURE
1. High reliability and stability
2. Reduced size of final equipment
3. Lower assembly costs
4. Higher component and equipment reliability
5. Lead free products 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
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. Consctruction of Chip-R
POE International Corp
M01-00-E-07
SPECIFICATION OF GENERAL PURPOSE CHIP RESISTOR
Ver: 1
Page: 3 of 7
QUICK REFERENCE DATA
Item General Specification
Series No. WR10X
Size code 1210 ( 3226 )
Resistance Tolerance ±1% ( E96/E24 ), ±5% ( E24 )
Resistance Range Jumper, 1Ω ~ 10MΩ ( E96+E24 series)
TCR (ppm/°C)
-55°C ~ +155°C
10R ~ 1M0, ≤ ± 100 ppm/°C
< 10R; > 1M0, ≤ ± 200 ppm/°C
Max. dissipation at Tamb=70°C 1/3 W ( 0.33 W )
Max. Operation Voltage (DC or RMS)
200V ( I = 2.6 Amp. for jumper )
Climatic category (IEC 60068) 55/155/56
Basic specification JIS C 5202 / IEC 60115-1
Type WR10X
Power Rating At 70C 1/3 W
Resistance Max. 50mR
Rated Current 2.5 A
Peak Current 6 A
Operating Temperature
-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
ValueResistancePower RatedRCWV ×= or Max. RCWV listed above, whichever is lower.
Dimensions:
Part No
WR10X
L 3.10 ± 0.10
W 2.60 ± 0.10
Tt 0.50 ± 0.20
Tb 0.50 ± 0.20 *1
t 0.55 ± 0.10
*1 original 0.45+/-0.20
POE International Corp
M01-00-E-07
SPECIFICATION OF GENERAL PURPOSE CHIP RESISTOR
Ver: 1
Page: 4 of 7
Marking
4-digits marking for 1%, 3-digits marking for 5%
Example
RESISTANCE 90Ω 100Ω 6800Ω 47000Ω
4-digits marking 90R0 1000 6801 4702
3-digits marking - 101 682 473
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken
from the E96 & E24 series for resistors with a
tolerance of ±1%, ±5%. The values of the
E24/E96 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.
SOLDERING CONDITION
The robust construction of chip resistors allows them to
be completely immersed in a solder bath of 260°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
245°C during 3 seconds. The test condition for no
leaching is 260°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
Fig 2. Maximum dissipation in percentage of rated power
As a function of the ambient temperature
POE International Corp
M01-00-E-07
SPECIFICATION OF GENERAL PURPOSE CHIP RESISTOR
Ver: 1
Page: 5 of 7
CATALOGUE NUMBERS
The resistors have a catalogue number starting with .
WR10 X 4702 J T _
Size code
WR10: 1210
Type code
X : Thick
film, 10R
~ 1M
W: < 10R ;
> 1M0
Resistance code
E96 +E24:
3 significant digits followed by no.
of zeros
102Ω =1020
37.4KΩ =3742
220Ω =2200
Tolerance
J: ± 5%
F: ± 1%
P: Jumper
Packaging code
T: 7” Reeled taping
Termination code
_ = SnPb base (“_”
means a blank)
L = Sn base (lead
free)
n Reeled tape packaging : 8mm width paper taping 5000pcs per 7” reel.
TEST AND REQUIREMENTS
Basic specification : JIS C 5202 / IEC 60115-1
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 68-1, subclause 5.3, unless otherwise specified.
Temperature: 15ºC to 35ºC.
Relative humidity: 45% to 75%.
Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar).
TEST PROCEDURE REQUIREMENT
Temperature
Coefficient of
Resistance (TCR )
Natural resistance change per change in degree centigrade.
( )
6
121
12 10×
−
−
ttR RR (ppm/°C)
R1 : Resistance at reference temperature
R2 : Resistance at test temperature
t1 : 25°C
Test temperature –55~+155°C
10R ~ 1M0, ≤ ± 100 ppm/°C
< 10R; > 1M0, ≤ ± 200 ppm/°C
Short time overload
(STOL ) 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.
∆R/R max. ±(2%+0.1Ω)
Resistance to
soldering heat Unmounted chips 10±1 seconds, 260±5ºC no visible damage
∆ R/R max. ±(1%+0.05Ω)
Solderability Termination Sn base (lead free) : Unmounted chip
completely immersed in a lead free solder bath, 245°C±5°C,
3±1 sec
good tinning (>95% covered)
no visible damage
Temperature cycling
1. 30 minutes at -55°C±3°C,
2. 2~3 minutes at room temperature,
3. 30 minutes at +155°±3°C,
4. 2~3 minutes at room temperature,
Total 5 continuous cycles
no visible damage
∆R/R max. ±(1%+0.05Ω)
POE International Corp
M01-00-E-07
SPECIFICATION OF GENERAL PURPOSE CHIP RESISTOR
Ver: 1
Page: 6 of 7
Load life (endurance)
70±2ºC, 1000 hours, loaded with RCWV or Vmax,1.5 hours
on and 0.5 hours off 10R-1M0, ∆R/R max. ± (3%+0.1Ω)
R<10R, R>1M0, ∆R/R max.
± (5%+0.1Ω)
Load life in Humidity
1000 hours, at rated continuous working voltage in humidity
chamber controller at 40°C±2°C and 90~95% relative
humidity, 1.5hours on and 0.5 hours off
10R-1M0, ∆R/R max. ± (3%+0.1Ω)
R<10R, R>1M0, ∆R/R max.
± (5%+0.1Ω)
Bending and
Termination strength
Resistors mounted on a 90mm glass epoxy resin PCB(FR4);
bending : 3 mm, once for 10 seconds
Pulling test : 500grams, 30seconds
∆R/R max. ±(1%+0.05Ω)
PACKAGING
Paper Tape specifications (unit :mm)
Component Size / Series W F E P0 ΦD
WR10X 8.00±0.30 3.50±0.20 1.75±0.10 4.00±0.10 1.0 0.0
50.1 +
−
Φ
Component Size / Series A B P1 T
WR10X 3.60±0.20 3.00±0.20 4.00±0.10 Max. 1.0
Reel dimensions
POE International Corp
M01-00-E-07
SPECIFICATION OF GENERAL PURPOSE CHIP RESISTOR
Ver: 1
Page: 7 of 7
Symbol A B C D
(unit : mm) Φ178.0±2.0 Φ60.0±1.0 13.0±0.2 9.0±0.5
Taping quantity
- Chip resistors 5,000 pcs/reel
