DATA SHEET
SURGE CHIP RESISTORS
SRC01
5%
size 1206
Product Specification – Jul 24, 2003 V.5
Phycomp
Product specification
Surge chip resistors
size 1206
FEATURES
•
Reduced size of final equipment
•
Low assembly costs
•
Higher component and equipment
reliability
•
Excellent performance at high
frequency.
APPLICATIONS
•
Power supply in small sized
equipment
•
Telecommunication
•
Medical and Military
•
Automotive industry.
TYPE
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.
SRC01
1
Ω
to 100 kΩ
5
QUICK REFERENCE DATA
DESCRIPTION
Resistance range
Resistance tolerance
Temperature coefficient
Absolute maximum at T
amb
= 70
°C
Maximum permissible voltage
Climatic category (IEC 60068)
Basic specification
ORDERING INFORMATION
Table 1
Ordering code indicating type and packing
1
Ω
to 100 kΩ
±5%;
E24 series
≤±200 ×
10
−6
/K
0.25 W
200 V (DC or RMS)
55/155/56
IEC 60115-8
VALUE
SRC01
5%
ORDERING CODE 2350 550 …..
RESISTANCE
RANGE
TOL.
(%)
PAPER TAPE ON REEL
5000 UNITS
10 …
Ordering code (12NC)
•
The resistors have
•
a 12-digit ordering code starting
with 2350 550.
•
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
8
9
1
2
3
4
RESISTANCE
1 to 9.76
Ω
10 to 97.6
Ω
100 to 976
Ω
1 to 9.76 kΩ
10 to 97.6 kΩ
100 kΩ
O
RDERING EXAMPLE
The ordering code of an SRC01
resistor, value 750
Ω
with a
tolerance of 5%, supplied on paper
tape of 5000 units per reel is:
2350 550 10751.
2003 Jul 24 Rev.5
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Phycomp
Product specification
Surge chip resistors
size 1206
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of nominal
resistance are taken from 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
LIMITING
LIMITING
(1)
POWER
VOLTAGE
(W)
(V)
200
0.25
50
SRC01
5%
D
ERATING
The power that the resistor can dissipate depends on the operating
temperature; see Fig.1.
P
max
(%P
rated
)
100
CCB412
SRC01
Note
0
−55
0
50
70
100
155
T
amb
(°C)
1. This is the maximum voltage that
may be continuously applied to
the resistor element, see
“IEC publication 60115-8”.
P
ULSE LOADING CAPABILITIES
Fig.1
Maximum dissipation (P
max
) in percentage of rated power as a
function of the ambient temperature (T
amb
).
10
2
P
max
(W)
CCB547
SRC01
10
RC01
1
0
0
0.2
0.4
0.6
0.8
t (s)
1.0
Fig. 2 Pulse on a regular basis; maximum permissible peak pulse power (P
max
)
as a function of pulse duration for R = 1
Ω,
single pulse.
2003 Jul 24 Rev.5
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Phycomp
Product specification
Surge chip resistors
size 1206
MECHANICAL DATA
Mass per 100 units
TYPE
SRC01
Marking
T
SRC01
5%
Outlines
MASS
(g)
0.87
protective coat
resistor layer
inner electrode
end termination
All resistors are marked with a 3-digit
code on the protective coating to
designate the nominal resistance
value.
3-D
IGIT
M
ARKING
For values of 1 kΩ the first 2 digits
apply to the resistance value and the
third indicates the number of zeros
to follow.
Example
MARKING
100
102
104
P
ACKAGE MARKING
The packing is also marked and
includes resistance value, tolerance,
catalogue number, quantity,
production period, batch number and
source code.
RESISTANCE
10
Ω
1 kΩ
100 kΩ
ceramic substrate
t
b
protective coat
t
t
marking
W
101
CCB545
L
For dimensions see Table 3.
Fig.3
Outlines.
Table 3
TYPE
SRC01
Chip resistor type and relevant physical dimensions; see Fig.3
L
(mm)
3.20
+0.10/−0.20
W
(mm)
1.6
±0.15
T
(mm)
t
t
(mm)
t
b
(mm)
0.50
±0.25
0.55
±0.10
0.45
±0.25
2003 Jul 24 Rev.5
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Phycomp
Product specification
Surge chip resistors
size 1206
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
Table 4
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 values apply:
Temperature: 15
°C
to 35
°C
Relative humidity: 45% to 75%
Air pressure: 86 kPa to 106 kPa
SRC01
5%
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.
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
4.29
20 (Tb)
45 (Xa)
visual
examination
resistance
resistance to
soldering heat
component
solvent
resistance
solderability
applied voltage (+0/−10%): 0.1 V
unmounted chips: 10
±1
s; 260
±5 °C
isopropyl alcohol; H
2
O
no holes; clean surface;
no visible damage
R
−
R
nom
: max.
±5%
no visible damage
∆R/R
max.:
±(1% +
0.05
Ω)
no visible damage
4.17
20 (Ta)
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
200 V (RMS) during 1 minute
room temperature;
dissipation 6.25
×
P
n
;
5 s (voltage not more than 2
×
V
max
)
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
good tinning
(≥95% covered);
no damage
good tinning
(≥95% covered);
no damage
no breakdown or flashover
∆R/R
max.:
±(2% +
0.1
Ω)
4.17
20 (Ta)
solderability
(after ageing)
4.7
4.13
voltage proof
on insulation
short time
overload
(JIS)
C 5200
14 (Na)
bending
4.33
no visible damage
∆R/R
max.:
±(0.5% +
0.05
Ω)
no visible damage
∆R/R
max.:
±(1.5% +
0.05
Ω)
4.19
rapid change of
temperature
2003 Jul 24 Rev.5
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