Approval sheet
WR02X(W)
±
5%,
±
1%
RoHS compliant and Lead content 100ppm
General purpose chip resistors
Size 0201
*Contents in this sheet are subject to change without prior notice.
Page 1 of 7
ASC_WR02X_TR_V02
Jul - 2013
Approval sheet
FEATURE
1. Small size and light weight
2. High reliability and stability
3. Reduced size of final equipment
4. Suitable for high density print circuit board assembly
5. Higher component and equipment reliability
6. RoHS compliant and Lead free product
APPLICATION
1.
2.
3.
4.
5.
Mobile phone
PDA
Camcorders
Palmtop computers
Hybrid module
DESCRIPTION
The
LEAD FREE
resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal
electrodes are added at each end and connected by a
LEAD FREE
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
BLACK
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 WR02X
Page 2 of 7
ASC_WR02X_TR_V02
Jul - 2013
Approval sheet
QUICK REFERENCE DATA
Item
Series No.
Size code
Resistance Range
General Specification
WR02X(W)
0201(0603)
1Ω~10MΩ (
±5%
tolerance ), Jumper
1Ω~1MΩ (
±1%
tolerance )
Resistance Tolerance
±1%
E96/E24
±5%
E24
100Ω - 10MΩ,
±200
10
Ω
-
97.6
Ω,
+600 ~ 0
1
-
9.76Ω, +800~ -100
TCR (ppm/°C)
Max. dissipation @ T
amb
=70°C
Max. Operation Voltage (DC or RMS)
Max. Overload Voltage (DC or RMS)
Climatic category (IEC 60068)
Note :
1.
2.
1/20 W
25V
50V
55/125/56
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.
DIMENSION(unit : mm)
Protective c oat
Type
L
W
T
Tb
Tt
WR02X(W)
0.60
±
0.03
0.30
±
0.03
0.23
±
0.03
0.15
±
0.05
0.10
±
0.05
W T
L
T
End term ination
Tb
Tt
Resistive layer
Ceramic S
ubstrate
MARKING
WR02X(W) has no marking.
Page 3 of 7
ASC_WR02X_TR_V02
Jul - 2013
Approval sheet
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal resistance are taken from the E24/E96 series for resistors with a tolerance of
±5%
&
±1%.
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
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.
SOLDERING CONDITION
The robust construction of chip resistors allows them to
be completely immersed in a solder bath of 260°C 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
235°C during 2 seconds. The test condition for no
leaching is 260°C 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 WR02X(W)
Page 4 of 7
ASC_WR02X_TR_V02
Jul - 2013
Approval sheet
CATALOGUE NUMBERS
The resistors have a catalogue number starting with :
WR02
Size code
WR02
: 0201
Type code
X : Normal
W : 1% For <10Ω and
>1MΩ
X
472_
Resistance code
5%, E24: 2 significant digits
followed by no. of
zeros and a blank.
100Ω
10KΩ
= 101_
= 103_
J
Tolerance
J :
±5%
F :
±1%
P : Jumper
A
Packaging code
A : 7” Reeled taping
(15Kpcs/Reel)
T
: 7” Reeled taping
(10Kpcs/Reel)
R
RoHS code
R = Lead free
(< 100 ppm )
1%, E24+E96: 3 significant
digits followed by no.
of zeros
100Ω
37.4KΩ
=1000
=3742
LEAD content: below 100ppm with reference to IEC62321, determination of LEAD by ICP-AES
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
DC resistance
Clause 4.5
PROCEDURE / TEST METHOD
DC resistance values measured at the test voltages
specified below :
<10Ω@0.1V,
<10KΩ@3V,
<10MΩ@30V
<100Ω@0.3V, <1KΩ@1.0V,
<100KΩ@10V, <1MΩ@25V,
REQUIREMENT
Resistor
0Ω
Ω
Within the specified tolerance
<50mΩ
Temperature Coefficient
of Resistance(T.C.R)
Clause 4.8
Natural resistance change per change in degree Refer to
centigrade.
“QUICK REFERENCE DATA”
R
2
−
R
1
×
10
6
R
1
(
t
2
−
t
1
)
(ppm/°C)
t
1
: 20°
C+5°
C-1°
C
N/a
R
1
: Resistance at reference temperature
R
2
: Resistance at test temperature
Short time overload
(S.T.O.L)
Clause 4.13
Permanent resistance change after a 2second
application of a voltage 2.5 times RCWV or the maximum
∆R/R
max.
±(1%+0.05Ω)
overload voltage specified in the above list, whichever is
less.
<50mΩ
Page 5 of 7
ASC_WR02X_TR_V02
Jul - 2013
单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
