DATA SHEET
TRIMMABLE CHIP RESISTORS
RC02TR/12TR
sizes 1206 and 0805
Product Specification –May 20, 2003 V.9
Phycomp
Product specification
Trimmable chip resistors
sizes 1206 and 0805
FEATURES
•
Reduced size of final equipment
•
Low assembly costs
•
Specific electrical requirements
(such as HF characteristics).
APPLICATIONS
This trimmable chip-resistor is
suitable for the whole electronic
industry and can replace trimmer
resistors in several applications.
QUICK REFERENCE DATA
DESCRIPTION
Resistance range
Resistance tolerance
Temperature coefficient
1
Ω ≤
R
<
10
Ω
10
Ω ≤
R
≤
1 MΩ
1 MΩ
<
R
Absolute maximum dissipation at
T
amb
= 70
°C
Maximum permissible voltage
DESCRIPTION
The resistors are constructed on a
high grade ceramic body (aluminium
oxide). Internal metal electrodes are
added at each end and a connection
is made between them using a
resistive metal glaze; the
approximate resistor values are
dependent on the composition of the
glaze.
The resistive layer is covered with a
translucent protective coat. Finally,
two end electrodes are added, the
composition of which has been
designed to provide ease of
soldering.
Climatic category (IEC 60068)
Basic specification
ORDERING INFORMATION
Ordering code (12NC)
Table 1
RC02TR/12TR
VALUE
RC02TR
RC12TR
1
Ω
to 10 MΩ; E24 series
0/−20% and 0/−30%
≤250 ±250 ×
10
−6
/K
≤±100 ×
10
−6
/K
≤±200 ×
10
−6
/K
0.25 W
200 V (RMS)
0.125 W
150 V (RMS)
55/155/56
IEC 60115-8
Ordering code indicating resistor type and packing
ORDERING CODE 2350 50. 1….
TYPE
TOL.
(%)
RC02TR
RC12TR
PAPER TAPE ON REEL
5 000 units
5 000 units
501 11…
501 10…
RC02TR/RC12TR
+0/−20
+0/−30
500 11…
500 10…
2003 May 20 Rev.9
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Phycomp
Product specification
Trimmable chip resistors
sizes 1206 and 0805
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal
resistance are taken from the E24
series for resistors with a tolerance
of 0/−20% and 0/−30%.
Limiting values
TYPE
LIMITING
LIMITING
(1)
POWER
VOLTAGE
(W)
(V)
200
150
0.25
0.125
0
−55
0
50
70
100
RC02TR/12TR
D
ERATING
The power that the resistor can dissipate depends on the operating
temperature; see Fig.1.
P
max
(%P
rated
)
100
CCB412
50
RC02TR
RC12TR
Note
1. This is the maximum voltage that
may be continuously applied to
the resistor element, see
“IEC publication 60115-8”.
155
T
amb
(°C)
Fig.1
Maximum dissipation (P
max
) in percentage of rated power as a
function of the ambient temperature (T
amb
).
Application information
T
RIMMING INSTRUCTIONS WITH
YAG-
LASER
Typical values for:
Cutting speed = 10 to 300 mm/s
Laser power = 1 to 6 W
Maximum trimming length = 60% of resistor film width
Minimum distance between end termination and trimming cut = 0.50 mm.
P
ROTECTION OF LASER CUT
With epoxy-phenol lacquers, epoxy resins or silicon alkyd-resins.
This is necessary for humidity tests and stability at load.
2003 May 20 Rev.9
3
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Phycomp
Product specification
Trimmable chip resistors
sizes 1206 and 0805
MECHANICAL DATA
Mass per 100 units
TYPE
RC02TR
RC12TR
Marking
The resistor is not marked. The
packing is marked and includes
resistance value, tolerance,
catalogue number, quantity,
production period, batch number and
source code.
MASS
(g)
1
0.55
tb
tt
T
RC02TR/12TR
Outlines
protective coat
resistor layer
inner electrode
end termination
ceramic substrate
protective coat
W
MBA564 - 2
L
For dimensions see Table 2.
Fig.2
Outlines.
Table 2
TYPE
RC02TR
RC12TR
Chip resistor type and relevant physical dimensions; see Fig.2
L
(mm)
W
(mm)
T
(mm)
t
t
(mm)
t
b
(mm)
3.20
1.60
±0.15
+0.10/−0.20
3.20
±0.15
1.25
±0.15
0.55
±0.10
0.45
±0.25
0.50
±0.25
0.55
±0.10
0.45
±0.20
0.50
±0.20
2003 May 20 Rev.9
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Phycomp
Product specification
Trimmable chip resistors
sizes 1206 and 0805
TEST AND REQUIREMENTS
Essentially all tests are carried out in
accordance with the schedule of
“IEC publication 60115-8”,
category
55/155/56 (rated temperature range
−55
to
+155 °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
Table 3
testing procedure for electronic
components”
and under standard
atmospheric conditions in
accordance with
“IEC 60068-1”,
subclause 5.3.
Unless otherwise specified the
following values apply:
Temperature: 15
°C
to 35
°C
Relative humidity: 45% to 75%
Air pressure: 86 kPa to 106 kPa
(860 mbar to 1060 mbar).
RC02TR/12TR
In Table 3 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.
Test procedures and requirements
IEC
60068-2
TEST
METHOD
20 (Ta)
IEC
60115-8
CLAUSE
4.17
TEST
PROCEDURE
REQUIREMENTS
solderability
unmounted chips completely
immersed for 2
±0.5
s in a solder bath
at 235
±2 °C
10
±1
s; 260
±5 °C
30 minutes at LCT and
30 minutes at UCT; 5 cycles
resistors mounted on a 90 mm glass
epoxy resin PCB (FR4), bending:
3 mm for
RC02TR,
5 mm for
RC12TR
56 days; 40
±2 °C;
93
+2/−3%
RH;
loaded with 0.01 P
n
R
≤
1 MΩ
R
>
1 MΩ
good tinning (≥95% covered);
no visible damage
∆R/R
max.:
±(0.5% +
0.05
Ω)
∆R/R
max.:
±(0.5% +
0.05
Ω)
no visible damage
∆R/R
max.:
±(0.5% +
0.05
Ω)
4.18
4.19
20 (Tb)
14 (Na)
resistance to
soldering heat
rapid change of
temperature
bending
4.24.2
3 (Ca)
damp heat
(steady state)
∆R/R
max.:
±(1.0% +
0.05
Ω)
∆R/R
max.:
±(1.5% +
0.05
Ω)
4.25.1
endurance
1000 hours
+48/−0
hours; 70
±2 °C;
nominal dissipation;
1.5 hours on and 0.5 hours off
R
≤
1 MΩ
R
>
1 MΩ
∆R/R
max.:
±(1% +
0.05
Ω)
∆R/R
max.:
±(1.5% +
0.05
Ω)
R
ins
min.: 10
3
MΩ
∆R/R
max.:
±(1% +
0.05
Ω)
4.6.1.1
4.13
insulation
resistance
short time
overload
100 V (DC) after 1 minute,
metal block method
room temperature; P = 6.25
×
P
n
;
5 s (V
≤
2
×
V
max
for
RC02TR,
V
≤
200 V for RC12TR)
2003 May 20 Rev.9
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