Standard High Ohmic/High Voltage Resistors
www.vishay.com For technical questions contact: ff3dresistors@vishay.com Document Number: 28748
1Revision: 25-Feb-05
SVR25
Vishay BCcomponents
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.”
Note
1. Ohmic values (other than resistance range) are available on request.
2. Limiting element voltage is
TECHNICAL SPECIFICATIONS
DESCRIPTION SVR25
DIN size 0207
Resistance range(1) 100 kΩ - 4.7 MΩ
Resistance tolerance and series ± 5 %: E24 Series, ± 1 %: E24/E96 Series
Max. rated dissipation, P70 0.25 W
Thermal resistance, Rth 180 K/W
Tem perature coefficient ≤ 350 x 10-6 /K
Operating voltage, Umax AC/DC(2) 1000 VDC/700 Vrms
Dielectric withstanding voltage of insulation for 1 minute 500 V
Climatic category (LCT/UCT/days) (IEC 60068) 55/155/56
Basic Specifications IEC 60115-B
Stability, ∆R/R max., after:
load (1000 hours) ± 5 % ± 0.1 Ω
accelerated damp heat test (6 days) ± 2 % ± 0.1 Ω
long term damp heat test (56 days) ± 5 % ± 0.1 Ω
PxR
12NC ORDERING CODE INDICATING RESISTOR TYPE AND PACKAGING
DESCRIPTION ORDERING CODE 2322 246 .....
BANDOLIER IN AMMOPACK BANDOLIER ON REEL
TYPE TAPE WIDTH (mm) TOL. (%) 5000 units 5000 units
SVR25 52 ± 1 % 7.... 8....
± 5 % 53... 23...
LAST DIGIT OF 12NC
RESISTANCE DECADE 100 kΩ to 976 kΩ1 MΩ to 4.7 MΩ
LAST DIGIT 45
Document Number: 28748 For technical questions contact: ff3dresistors@vishay.com www.vishay.com
Revision: 25-Feb-05 2
SVR25
Stan dard High Ohmic/
High Voltage Resistors Visha y BCcomponent s
ORDERING INFORMATION
Numeric Ordering Code (12NC)
•The resistors have a 12-digit ordering code starting with
2322 246.
•The subsequent first di gi t fo r 1 % tole ranc e 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 2.7MΩ with
toleranc e of ± 1 % and supplied on a bando lier of 500 0 units
in ammopack is 2322 246 7 2705.
DIMENSIONS
L
d
D
II
1
2
DIMENSIONS - leaded resistor type and relevant
physic al dim ens io ns
TYPE Dmax
(mm) L2max
(mm) dnom
(mm)
SVR 25 2.5 7.5 0.58
MASS PER 100 UNITS
TYPE MASS
(g)
SVR 25 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 ins tead o f gol d and sil ver b ecaus e me tal p article s in lac quer c ould affec t high vol tage propert ies.
FUNCTIONAL PERFORMANCE
PRODUCT CHARACTERIZATION
Standard va lues of nomin al resista nce are taken from the E24/E96 series fo r resistors w ith tolerance of ± 1 %, ± 5 %. The va lues
of the E24/E96 series are in accordance with “IEC publication 60063”
Note
1. The maximum voltage that may be continuously applied to the resistor element is in accordance with “IEC publication 60115-1”. The max imum
permissible hot spot temperature is 155 °C
DERATING CURVE
LIMITING VALUES
TYPE LIMITING VOLTAGE (V) LIMITING POWER (W)
DC RMS
SVR25 1000 700 0.25
0
100
70 15
5
Ambient Temperature (°C
)
Percentage of the rated
dissipation (%)
T
he power that the resistor can dissipate depends on the
o
perating temperature, shown in the figure
www.vishay.com For technical questions contact: ff3dresistors@vishay.com Document Number: 28748
3Revision: 25-Feb-05
SVR25
Vishay BCcomponents Standard High Ohmic/
High Voltage Resistors
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance with the
sched ule of “IEC pub lication 60115-1, c ategory LCT/ UCT/56
(rated temperature range: Lower Category Temperature,
Upper category Temperature, damp heat, long term, 56
days). T he testi ng also cover s the requ iremen ts spe cified 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 und er standard atmospheric conditions a ccording to IEC
60068-1, subcl aus e 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 60 068-2; a short
description of the test procedure is also given. In some
instances deviations from the IEC recommendations were
necessary for our meth od of s pecifying.
All soldering tests are performed with mildly activated flux.
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
4.16 21 (U) robustness of
terminations:
4.16.2 21 (Ua1) tensile all samples load 10N; 10s number of failures: < 10 x 10-6
4.16.3 21 (Ub) bending half number
of samples load 5N; 4 x 90° number of failures: < 10 x 10-6
4.16.4 21 (Uc) torsion other half
number of samples 3 x 360° in opposite
directions no damage, ∆R/R max.: ± (1 % + 0.05 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; 3mm from body
∆R/R max.: ± (2 % + 0.05 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.: ± (2 % + 0.1 Ω)
4.23 climatic sequence:
4.23.2 2 (Ba) dry heat 16 h; 155 °C
4.23.3 30 (Db) damp heat
(accelerated) 1 st cycle 24 h; 55 °C;
90 to 100 % RH
4.23.4 1 (Aa) cold 2 h; - 55 °C
4.23.5 13 (M) low air pressure 2 h; 8.5 kPa; 15 - 35 °C Rins min.: 103 MΩ
4.23.6 30 (Db) damp heat,
(accelerated)
remaining cycles
5 days; 55 °C;
95 to 100 % RH;
∆R/R max.: ± (2 % + 0.1 Ω)
4.24.2 3 (Ca) damp heat,
(steady state) 56 days; 40 °C;
90 to 95 % RH; dissipation
0.01 Pn; limiting voltage
100V (DC)
∆R/R max.: ± (5 % + 0.1 Ω)
4.25.1 −endurance at 70 °C 1000 h loaded with Pn or
Vmax
∆R/R max.: ± (5 % + 0.1 Ω)
4.8.4 −temperature coefficient between - 55 °C t o + 155 °C;
(TC ppm/°C)
≤ ± 350
Document Number: 28748 For technical questions contact: ff3dresistors@vishay.com www.vishay.com
Revision: 25-Feb-05 4
SVR25
Standard High Ohmic/
High Voltage Resistors Vishay BCcomponent s
4.7 −voltage proof on
insulation 500 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 x Pn
(voltage not more than 2 x
limiting voltage); 10 cycles;
5 s ON and 45 s OFF
∆R/R max.: ± (2 % + 0.1 Ω)
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
IEC
60068-2
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
