SVR25
Vishay BCcomponents
Standard High Ohmic/High Voltage Resistors
FEATURES
•
High working voltage, high pulse loading capability
•
Metal glaze thick film resistive element
•
Good stability and reliability
•
Available in E24/E96 series
APPLICATIONS
•
High Resistance, High Voltage applications
•
Televisions and Monitors
•
Power Supplies
•
Electronic Ballast
•
White Goods
DESCRIPTION
A metal glazed film is deposited on a high grade ceramic body. After a helical groove is cut in the resistive layer, connecting
wires of electrolytic copper plated with 100 % pure tin are welded to the termination caps.
The resistors are coated with a light violet lacquer which provides electrical, mechanical and climatic protection. The
encapsulation is resistant to all cleaning solvents in accordance with “MIL-STD 202 E method 215” and “IEC 60068-2-45.”
TECHNICAL SPECIFICATIONS
DESCRIPTION
DIN size
Resistance range
(1)
Resistance tolerance and series
Max. rated dissipation,
P
70
Thermal resistance, Rth
Temperature coefficient
Operating voltage,
U
max
AC/DC
(2)
Dielectric withstanding voltage of insulation for 1 minute
Climatic category (LCT/UCT/days) (IEC 60068)
Basic Specifications
Stability,
∆R/R
max., after:
load (1000 hours)
accelerated damp heat test (6 days)
long term damp heat test (56 days)
Note
1. Ohmic values (other than resistance range) are available on request.
2. Limiting element voltage is PxR
SVR25
0207
100 kΩ - 4.7 MΩ
± 5 %: E24 Series, ± 1 %: E24/E96 Series
0.25 W
180 K/W
≤
350 x 10
-6
/K
1000 VDC/700 Vrms
500 V
55/155/56
IEC 60115-B
± 5 % ± 0.1
Ω
± 2 % ± 0.1
Ω
± 5 % ± 0.1
Ω
12NC ORDERING CODE INDICATING RESISTOR TYPE AND PACKAGING
DESCRIPTION
TYPE
SVR25
TAPE WIDTH (mm)
52
±5%
53...
23...
TOL. (%)
±1%
ORDERING CODE 2322 246 .....
BANDOLIER IN AMMOPACK
5000 units
7....
BANDOLIER ON REEL
5000 units
8....
LAST DIGIT OF 12NC
RESISTANCE DECADE
LAST DIGIT
100 kΩ to 976 kΩ
4
1 MΩ to 4.7 MΩ
5
www.vishay.com
1
For technical questions contact: ff3dresistors@vishay.com
Document Number: 28748
Revision: 25-Feb-05
SVR25
Standard High Ohmic/
High Voltage Resistors
ORDERING INFORMATION
Numeric Ordering Code (12NC)
•
The resistors have a 12-digit ordering code starting with
2322 246.
•
The subsequent first digit for 1 % tolerance products (E24
and E96 series) or 2 digits for 5 % (E24 series) indicate the
resistor type and packaging.
•
The remaining digits indicate the resistance value. The first
three digits for 1 % or 2 digits for 5 % tolerance products
indicate the resistance value. The last digit indicates the
resistance in decade.
Ordering Example
The ordering code of an SVR25 resistor value 2.7M
Ω
with
tolerance of
±
1 % and supplied on a bandolier of 5000 units
in ammopack is 2322 246 7 2705.
Vishay BCcomponents
DIMENSIONS
L
1
2
D
I
I
d
DIMENSIONS
- leaded resistor type and relevant
physical dimensions
TYPE
SVR 25
D
max
(mm)
2.5
L2
max
(mm)
7.5
d
nom
(mm)
0.58
MASS PER 100 UNITS
TYPE
SVR 25
MASS
(g)
22
MARKING
The nominal resistance and tolerance are marked on the resistor using four or five color bands in accordance with “IEC publication
60062“ color codes for fixed resistors.
Yellow and grey colors are used instead of gold and silver because metal particles in lacquer could affect high voltage properties.
FUNCTIONAL PERFORMANCE
PRODUCT CHARACTERIZATION
Standard values of nominal resistance are taken from the E24/E96 series for resistors with tolerance of ± 1 %, ± 5 %. The values
of the E24/E96 series are in accordance with “IEC publication 60063”
LIMITING VALUES
TYPE
SVR25
LIMITING VOLTAGE (V)
DC
1000
RMS
700
LIMITING POWER (W)
0.25
Note
1. The maximum voltage that may be continuously applied to the resistor element is in accordance with “IEC publication 60115-1”. The maximum
permissible hot spot temperature is 155 °C
DERATING CURVE
The power that the resistor can dissipate depends on the
operating temperature, shown in the figure
Percentage of the rated
dissipation (%)
0
100
70
155
Ambient Temperature (°C)
Document Number: 28748
Revision: 25-Feb-05
For technical questions contact: ff3dresistors@vishay.com
www.vishay.com
2
SVR25
Vishay BCcomponents
TESTS AND REQUIREMENTS
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.
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.
In the Test Procedures and Requirements table 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.
All soldering tests are performed with mildly activated flux.
Standard High Ohmic/
High Voltage Resistors
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
4.16
4.16.2
4.16.3
4.16.4
4.17
4.18
4.19
IEC
60068-2
TEST
METHOD
21 (U)
21 (Ua1)
21 (Ub)
21 (Uc)
20 (Ta)
20 (Tb)
14 (Na)
TEST
PROCEDURE
REQUIREMENTS
robustness of
terminations:
tensile all samples
bending half number
of samples
torsion other half
number of samples
solderability
resistance to soldering
heat
rapid change of
temperature
climatic sequence:
load 10N; 10s
load 5N; 4 x 90°
3 x 360° in opposite
directions
2 s; 235°C
thermal shock; 3 s;
350 °C; 3mm from body
30 minutes at - 55 °C and
30 minutes at + 155 °C; 5
cycles
16 h; 155 °C
24 h; 55 °C;
90 to 100 % RH
2 h; - 55
°C
2 h; 8.5 kPa; 15 - 35 °C
5 days; 55
°C;
95 to 100 % RH;
56 days; 40 °C;
90 to 95 % RH; dissipation
0.01 Pn; limiting voltage
100V (DC)
1000 h loaded with Pn or
Vmax
between - 55 °C to + 155 °C;
(TC ppm/°C)
R
ins
min.: 10
3
MΩ
∆R/R
max.: ± (2 % + 0.1
Ω)
number of failures: < 10 x 10
-6
number of failures: < 10 x 10
-6
no damage,
∆R/R
max.: ± (1 % + 0.05
Ω)
good tinning; no damage
∆R/R
max.: ± (2 % + 0.05
Ω)
∆R/R
max.: ± (2 % + 0.1
Ω)
4.23
4.23.2
4.23.3
2 (Ba)
30 (Db)
dry heat
damp heat
(accelerated) 1
st
cycle
cold
low air pressure
damp heat,
(accelerated)
remaining cycles
damp heat,
(steady state)
4.23.4
4.23.5
4.23.6
1 (Aa)
13 (M)
30 (Db)
4.24.2
3 (Ca)
∆R/R
max.: ± (5 % + 0.1
Ω)
4.25.1
4.8.4
−
−
endurance at 70
°C
temperature coefficient
∆R/R
max.: ± (5 % + 0.1
Ω)
≤
± 350
www.vishay.com
3
For technical questions contact: ff3dresistors@vishay.com
Document Number: 28748
Revision: 25-Feb-05
SVR25
Standard High Ohmic/
High Voltage Resistors
Vishay BCcomponents
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
4.7
4.6.1.1
IEC
60068-2
TEST
METHOD
−
−
TEST
PROCEDURE
REQUIREMENTS
voltage proof on
insulation
insulation resistance
500 V (RMS) during 1
minute; V-block method
500 V (DC) during 1
minute; V-block method
room temperature;
dissipation 6.25 x Pn
(voltage not more than 2 x
limiting voltage); 10 cycles;
5 s ON and 45 s OFF
no breakdown
R
ins
min.: 10
4
MΩ
4.13
−
short time overload
∆R/R
max.: ± (2 % + 0.1
Ω)
Document Number: 28748
Revision: 25-Feb-05
For technical questions contact: ff3dresistors@vishay.com
www.vishay.com
4
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