ETC LSR37

BCcomponents
DATA SHEET
LSR37
Low ohmic surge resistor
Product specification
Supersedes data of 15th March 2001
File under BCcomponents, BC08
2002 Sep 26
BCcomponents
Product specification
Low ohmic surge resistor
FEATURES
• High pulse-loading capability
(flashes)
• Good replacement for
carbon-composite resistors.
LSR37
QUICK REFERENCE DATA
DESCRIPTION
VALUE
Resistance range
Resistance tolerance and series
1 kΩ to 10 kΩ
220 Ω to 910 Ω
±10%; ±20%; E12 series
Maximum dissipation at
Tamb = 70 °C
Thermal resistance, Rth
120 K/W
• Application for overload and high
voltage pulse hazard circuits
(TV-sets, monitors).
Temperature coefficient
0 to +600 × 10−6/K −600 to +200 × 10−6/K
Voltage coefficient
0 to +350 × 10−6/K
DESCRIPTION
Dielectric withstanding voltage
of the insulation for 1 minute
A metal glazed film is deposited on a
high grade ceramic body. After that
caps are applied to the rods and
electrolytic copper wires are welded to
these end caps.
Basic specifications
APPLICATIONS
The resistors are coated with a
light-blue lacquer which provides
electrical, mechanical and climatic
protection.
The encapsulation is resistant to all
cleaning solvents according to
“MIL-STD 202E, method 215” and
“IEC 60068-2-45”.
Maximum permissible voltage
• The subsequent 2 digits indicate the
resistor type and packaging; see
Table 1.
• The remaining 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.
2002 Sep 26
±50 × 10−6/V
Pn × R
700 V
IEC 60115-1B
55/155/56
Stability after:
climatic test
∆R/R max.: ±3% + 0.1 Ω
∆R/R max.: ±3% + 0.1 Ω
soldering
∆R/R max.: ±1% + 0.1 Ω
load (1000 hours)
High voltage test for
R-value > 3.3 kΩ, 10 kV; 1 nF;
50 × 12/minutes
∆R/R max.: ±20%
(typical value ±10%)
ESD contact discharge 12 kV;
100 pulses
∆R/R max.: ±20%
(typical value: ±10%)
Ordering code as function of tolerance and packaging
ORDERING INFORMATION
• The resistors have a 12-digit
ordering code staring with 2322 245
V =
Climatic category (IEC 60068)
Table 1
Ordering code (12NC)
0.5 W
TOLERANCE
(%)
TYPE
LSR37
Table 2
1000 units
IN AMMOPACK
5000 units
ON REEL
±10
12...
22...
±20
11...
21...
Last digit of 12NC
RESISTANCE
DECADE
LAST DIGIT
220 to 910 Ω
1
1 to 9.1 kΩ
2
10 kΩ
3
2
ORDERING CODE 2322 245 .....
ORDERING EXAMPLE
The ordering code for a LSR37, resistor
value 1.5 kW, 10% tolerance,
supplied on a bandolier of 1000 units
in ammopack, is: 2322 245 12152.
BCcomponents
Product specification
Low ohmic surge resistor
LSR37
FUNCTIONAL DESCRIPTION
Product characterization
Standard values of rated resistance (nominal resistance) are taken from the E12 series with a tolerance of 10% or 20%.The
values of the E12 series are in accordance with “IEC publication 60063”.
The limiting voltage DC is not applicable, because the maximum rated voltage for the maximum Rn-value of 10 kΩ at
Pn = 0.5 W is only 70.7 V.
The maximum permissible hot-spot temperature is 155 °C.
Limiting values
LIMITING VOLTAGE(1)
(V)
TYPE
LSR37
V =
LIMITING POWER
(W)
Pn × R
0.5
Note
1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60115-1”.
DERATING
The power that the resistor can dissipate depends on the operating temperature; see Fig.1.
CCB412
Pmax
(%Prated)
100
50
0
−55
Fig.1
2002 Sep 26
0
50
70
100
155
Tamb (°C)
Maximum dissipation (Pmax) in percentage of rated power
as a function of the ambient temperature (Tamb).
3
BCcomponents
Product specification
Low ohmic surge resistor
LSR37
PULSE LOADING CAPABILITY
CCB944
104
Pˆ max
(W)
103
102
10
1
10−6
10−5
10−4
10−3
10−2
10−1
1
ti (s)
Fig.2
2002 Sep 26
ˆ
Pulse on a regular basis; maximum permissible peak pulse power P
max as
a function of pulse duration (ti) for single pulse condition.
4
BCcomponents
Product specification
Low ohmic surge resistor
LSR37
Application information
The resistors with straight leads are suitable for processing on automatic insertion equipment and cutting and bending
machines.The minimum pitch for this type is 6e (15.0 mm).
For temperature rise at soldering place see Fig.4.
CCB361
80
CCB360
50
∆T
(K)
∆T
(K)
5 mm
40
60
10 mm
30
15 mm
40
20
20
10
0
0
0.4
0.8
P (W)
0
1.2
Fig.4
Fig.3
2002 Sep 26
Hot-spot temperature rise (∆T) as a
function of dissipated power.
5
0
0.4
0.8
P (W)
1.2
Temperature rise (∆T) at the lead end
(soldering point) as a function of dissipated
power at various lead lengths after mounting.
BCcomponents
Product specification
Low ohmic surge resistor
LSR37
MECHANICAL DATA
Mass per 100 units
TYPE
LSR37
MASS
(g)
L1
53.2
∅d
Marking
CCB414
∅D
The nominal resistance and tolerance are marked on the
resistor using coloured bands in accordance with
IEC publication 60062 “Colour codes for fixed resistors”.
L2
Three bands are used for 20% tolerance with no indication
for the tolerance. Four bands are used for 10% tolerance.
For dimensions see Table 3.
Fig.5 Outline.
Grey is used instead of silver for 10% and yellow is used
instead of gold for 5% because metal particles in the lacquer
could affect high-voltage properties.
Table 3
Outlines
The length of the body (L1) is measured by inserting the leads
into holes of two identical gauge plates and moving these
plates parallel to each other until the resistor body is
clamped without deformation (“IEC publication 60294”).
TYPE
LSR37
2002 Sep 26
6
Resistor type and relevant physical dimensions;
see Fig.5
∅D
MAX.
(mm)
L1
MAX.
(mm)
L2
MAX.
(mm)
∅d
(mm)
4.0
9.0
10.0
0.7 ±0.03
BCcomponents
Product specification
Low ohmic surge resistor
LSR37
TESTS AND REQUIREMENTS
In Table 4 the tests and requirements are listed with
reference to the relevant clauses of
“IEC publications 60115-1 and 60068-2”; 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.
Essentially all tests are carried out in accordance with the
schedule of “IEC publication 60115-1”, category
LCT/UCT/56 (rated temperature range: Lower Category
Temperature, Upper Category Temperature; damp heat,
long term, 56 days). The testing also covers the requirements
specified by EIA and EIAJ.
All soldering tests are performed with mildly activated flux.
The tests are carried out in accordance with IEC publication
60068-2, “Recommended basic climatic and mechanical
robustness testing procedure for electronic components”
and under standard atmospheric conditions according to
“IEC 60068-1”, subclause 5.3.
Table 4
Test procedures and requirements
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST
PROCEDURE
REQUIREMENTS
4.16
21 (U)
4.16.2
21 (Ua1)
robustness of terminations:
tensile all samples
∅0.7 mm; load 10 N; 10 s
number of failures <10 × 10−6
4.16.3
21 (Ub)
bending half number
of samples
∅0.7 mm; load 5 N; 4 × 90°
number of failures <10 × 10−6
4.16.4
21 (Uc)
torsion other half
of samples
3 × 360° in opposite directions
no damage
∆R/R max.: ±1.0% + 0.10 Ω
4.17
20 (Ta)
solderability
2 s; 235 °C
good tinning; no damage
4.18
20 (Tb)
resistance to
soldering heat
thermal shock: 3 s; 350 °C;
6 mm from body
∆R/R max.: ±1.0% + 0.10 Ω
4.19
14 (Na)
rapid change of
temperature
30 minutes at −55 °C and
30 minutes at +155 °C; 5 cycles
∆R/R max.: ±1.0% + 0.10 Ω
4.20
29 (Eb)
bump
3 × 1500 bumps in 3 directions;
40 g
no damage
∆R/R max.: ±1.0% + 0.10 Ω
4.22
6 (Fc)
vibration
frequency 10 to 500 Hz;
displacement 1.5 mm or
acceleration 10 g; 3 directions;
total 6 hours (3 × 2 hours)
no damage
∆R/R max.: ±1.0% + 0.10 Ω
4.23
climatic sequence:
4.23.2
2 (Ba)
dry heat
16 hours; 155 °C
4.23.3
30 (Db)
damp heat (accelerated)
1st cycle
24 hours; 55 °C; 90 to 100% RH
4.23.4
1 (Aa)
cold
2 hours; −55 °C
4.23.5
13 (M)
low air pressure
2 hours; 8.5 kPa; 15 to 35 °C
4.23.6
30 (Db)
damp heat (accelerated)
remaining cycles
5 days; 55 °C; 95 to 100% RH
Rins min.: 103 MΩ
4.24.2
3 (Ca)
56 days; 40 °C; 90 to 95% RH;
dissipation 0.01 Pn;
limiting voltage 100 V (DC)
∆R/R max.: ±3.0% + 0.1 Ω
2002 Sep 26
damp heat
(steady state)
∆R/R max.: ±3.0% + 0.1 Ω
7
BCcomponents
Product specification
Low ohmic surge resistor
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
LSR37
TEST
4.25.1
endurance
4.8.4
temperature coefficient
PROCEDURE
1000 hours at 70 °C; Pn or Vmax
REQUIREMENTS
∆R/R max.: ±3.0% + 0.1 Ω
220 Ω to 910 Ω
0 to +600 × 10−6/K
1 kΩ to 10 kΩ
−600 to +200 × 10−6/K
4.7
voltage proof on insulation 700 V (RMS) during 1 minute;
V-block method
no breakdown
4.6.1.1
insulation resistance
500 V (DC) during 1 minute;
V-block method
Rins min.: 104 MΩ
4.13
short time overload
room temperature;
dissipation 6.25 × Pn; 10 cycles; 5 s
on and 45 s off
∆R/R max.: ±2.5% + 0.10 Ω
high voltage pulse 10 kV;
1 nF; 50 × 12/min
for Rn > 3.3 kΩ
∆R/R max.: ±20%
(typical value ±10%)
12 kV ESD test; 100 pulses ESD contact discharge
4.26
active flammability
“Cheese-cloth test”
∆R/R max.: ±20%
(typical value: ±10%)
5 × Pn (RMS) duration 5 minutes
no flaming of gauze cylinder
application of test flame for 20 s
no ignition of product
no ignition of under-layer
burning time less than 30 s
Other test in accordance with IEC 60695
2.2
2002 Sep 26
passive flammability
“Needle-flame test”
8