DISCRETE CERAMICS
DATA SHEET
LRC11
5%
Low-ohmic chip resistors
size 0805
www.phycomp-components.com
Product specification
Supersedes data of 27th April 2001
2001 May 28 Rev.3
Phycomp
Product specification
Low-ohmic chip resistors
size 0805
FEATURES
•
Reduced size of final equipment
•
Low assembly costs
•
Higher component and equipment
reliability
•
Low inductance design for current
sensing applications.
APPLICATIONS
•
Television
•
Telecommunication equipment
•
Portable computers
•
Battery chargers
•
Lighting.
DESCRIPTION
The resistors are constructed on a
high grade ceramic body (aluminium
oxide). Internal metal electrodes are
added at each end and connected by
a resistive paste which 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 coating and printed with the
resistance value. Finally, the two
external end terminations are added.
For ease of soldering the outer
layer of these end terminations is a
lead/tin alloy.
QUICK REFERENCE DATA
DESCRIPTION
Resistance range
Resistance tolerance
Temperature coefficient:
0.02
Ω ≤
R < 0.04
Ω
0.04
Ω ≤
R < 0.10
Ω
0.10
Ω ≤
R < 0.20
Ω
0.20
Ω ≤
R < 0.50
Ω
0.50
Ω ≤
R < 0.99
Ω
Absolute maximum dissipation at
T
amb
= 70
°C
Maximum permissible voltage
Operating temperature range
Climatic category (IEC 60068)
Basic specification
Note
±1500 ×
10
−6
/K
±600 ×
10
−6
/K
±300 ×
10
−6
/K
±150 ×
10
−6
/K
±75 ×
10
−6
/K
0.125 W
150 V (DC or RMS)
−55
to +125
°C
55/125/56
IEC 60115-8
±5%
VALUE
LRC11
5%
0.02
Ω
to 0.99
Ω;
E24 series
1. Non-E24 values and special tolerances are available on request.
ORDERING INFORMATION
Table 1
Ordering code indicating type and packing
ORDERING CODE 2350 511 .....
TYPE
RESISTANCE
RANGE
0.02
Ω ≤
R < 1
Ω
TOL.
(%)
±5
PAPER TAPE ON REEL
5000 units
LRC11
10...
Ordering code (12NC)
•
The resistors have a 12-digit
ordering code starting with
2350 511
•
The subsequent 2 digits indicate
the resistor type and packing;
see Table 1.
•
The remaining 3 digits indicate the
resistance value:
– The first 2 digits indicate the
resistance value.
– The last digit indicates the
resistance decade in
accordance with Table 2.
Table 2
Last digit of 12NC
LAST DIGIT
0
7
RESISTANCE
DECADE
0.020 to 0.099
Ω
0.10 to 0.99
Ω
Ordering example
The ordering code of a LRC11 low
ohmic resistor, value 0.47
Ω
with a
5% tolerance, supplied on paper tape
of 5000 units per reel is:
2350 511 10477.
2001 May 28 Rev.3
2
www.phycomp-components.com
Phycomp
Product specification
Low-ohmic chip resistors
size 0805
FUNCTIONAL DESCRIPTION
Product characterization
The resistors are available in the
E24 series for resistors with a
tolerance of
±5%.
The values of the
E24 series are in accordance with
“IEC publication 60063”.
Limiting values
TYPE
LRC11
Note
1. The maximum voltage that may
be continuously applied to the
resistor element, see
“IEC publication 60115-8”.
LIMITING
VOLTAGE
(1)
(V)
150
LIMITING
POWER
(W)
0.125
0
55
0
50
70
100 125
o
Tamb ( C)
LRC11
5%
D
ERATING
The power that the resistor can dissipate depends on the operating
temperature; see Fig.1.
handbook, halfpage
P
max
(%Prated )
MLB206
100
50
Fig.1
Maximum dissipation (P
max
) in percentage of rated power
as a function of the ambient temperature (T
amb
).
2001 May 28 Rev.3
3
www.phycomp-components.com
Phycomp
Product specification
Low-ohmic chip resistors
size 0805
MECHANICAL DATA
Mass per 100 units
TYPE
LRC01
Marking
Each resistor is marked with a 4-digit
code on the protective coating to
designate the nominal resistance
value.
4-
DIGIT MARKING
The R is used as a decimal point.
Example
W
LRC11
5%
Outlines
MASS
(g)
0.55
T
protective coat
resistor layer
inner electrode
end termination
ceramic substrate
t
b
protective coat
t
t
marking
MARKING
R220
R100
R040
RESISTANCE
0.220
Ω
0.100
Ω
0.040
Ω
For dimensions see Table 3
R100
CCB525
L
The packing is also marked and
includes resistance value, tolerance,
catalogue number, quantity,
production period, batch number and
source code.
Fig.2 Outlines.
Table 3
TYPE
LRC11
Chip resistor type and relevant physical dimensions; see Fig.2
L
(mm)
2.0
±0.15
W
(mm)
1.25
±0.15
T
(mm)
0.55
±0.10
t
t
(mm)
0.40
±0.20
t
b
(mm)
0.40
±0.20
2001 May 28 Rev.3
4
www.phycomp-components.com
Phycomp
Product specification
Low-ohmic chip resistors
size 0805
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance with the
schedule of
“IEC publication 60115-8”,
category
55/125/56 (rated temperature range
−55
to +125
°C;
damp heat, long term, 56 days). The testing also covers
the requirements specified by EIA and EIAJ.
The tests are carried out in accordance with
IEC publication 60068,
“Recommended basic climatic and
mechanical robustness testing procedure for electronic
components”
and under standard atmospheric conditions
according to
“IEC 60068-1”,
subclause 5.3.
Temperature: 15
°C
to 35
°C
Relative humidity: 45% to 75%
Air pressure: 86 kPa to 106 kPa.
LRC11
5%
Unless otherwise specified the following values apply:
In Table 4 the tests and requirements are listed with
reference to the relevant clauses of
“IEC publications
60115-8 and 60068”;
a short description of the test
procedure is also given. In some instances deviations from
the IEC recommendations were necessary for our method
of specifying.
All soldering tests are performed with mildly activated flux.
Table 4
Test procedures and requirements
IEC
60068-2
TEST
METHOD
IEC
60115-8
CLAUSE
TEST
PROCEDURE
REQUIREMENTS
Tests in accordance with the schedule of IEC publication 60115-8
4.4.1
4.5
4.18
20 (Tb)
visual examination
resistance
resistance to
soldering heat
applied voltage (+0/−10%): 0.1 V
unmounted chips; 10
±1
s; 260
±5 °C
no holes; clean surface;
no damage
R
−
R
nom
: max.
±5%
no visible damage
∆R/R
max.:
±1%
no visible damage
good tinning (≥95% covered);
no damage
good tinning (≥95% covered);
no damage
no breakdown or flashover
∆R/R
max.:
±1%
4.29
4.17
4.17
45 (Xa)
20 (Ta)
20 (Ta)
component solvent isopropyl alcohol; H
2
O
resistance
solderability
solderability
(after ageing)
voltage proof on
insulation
unmounted chips completely immersed
for 2
±0.5
s in a solder bath at 235
±2 °C
8 hours steam or 16 hours at 155
°C;
unmounted chips completely immersed
for 2
±0.5
s in a solder bath at 235
±2 °C
150 V (DC or RMS) during 1 minute
4.7
4.13
short time overload room temperature;
dissipation 6.25
×
P
n
;
5 s (voltage not more than 2
×
V
max
)
(JIS)
C 5200
14 (Na)
bending
resistors mounted on a 90 mm glass
epoxy resin printed-circuit board;
bending: 5 mm
30 minutes at LCT and
30 minutes at UCT; 5 cycles
100 V (DC) after 1 minute
56 days; 40
±2 °C;
93 +2/−3% RH;
loaded with 0.01 P
n
4.33
no visible damage
∆R/R
max.:
±1%
no visible damage
∆R/R
max.:
±1%
R
ins
min.: 10000 MΩ
no visible damage
∆R/R
max.:
±3%
4.19
rapid change of
temperature
insulation
resistance
4.6.1.1
4.24.2
3 (Ca)
damp heat (steady
state)
2001 May 28 Rev.3
5
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