www.vishay.com For technical questions, contact: filmresistorsleaded@vishay.com Document Number: 28734
208 Revision: 05-Oct-09
VR68
Vishay BCcomponents
High Ohmic/High Voltage
Metal Glaze Leaded Resistors
A metal glazed film is deposited on a high grade ceramic
body. After a helical groove has been cut in the resistive
layer, tinned electrolytic copper wires are welded to the
end-caps. The resistors are coated with a light blue lacquer
which provides electrical, mechanical, and climatic
protection.
The encapsulation is resistant to all cleaning solvents in
accordance with IEC 60068-2-45.
FEATURES
•Rmax. = 68 MΩ; Umax. = 10 000 VDC
•These resistors meet the safety requirements of:
UL1676 (510 kΩ to 11 MΩ); File No: E171160
IEC 60065, clause 14.1.a)
DIN EN 60065, clause 14.1.a)
VDE 0860, clause 14.1.a)
CQC, China
•High pulse loading capability (10 kV)
•Small size (0718)
•Pure tin plating provides compatibility with lead (Pb)-free
and lead containing soldering processes
•Compliant to RoHS directive 2002/95/EC
APPLICATIONS
•Where high resistance, high stability and high reliability at
high voltage are required
•Safety component in combination with high voltage
•Picture tubes
•High voltage bleeders
•Cascade switches
Note
(1) Ohmic values (other than resistance range) are available upon request
TECHNICAL SPECIFICATIONS
DESCRIPTION VALUE
Resistance Range (1) 100 kΩto 68 MΩ
Resistance Tolerance and Series ± 1 %: E24/E96 series;
± 5 %: E24 series
Rated Dissipation, P70 1W
Thermal Resistance, Rth 70 K/W
Temperature Coefficient ≤ ± 200 ppm/K
Maximum Permissible Voltage Umax.:
DC 10 000 V
RMS 7000 V
Dielectric Withstanding Voltage of the Insulation for 1 Min 700 V
Basic Specifications IEC 60115
Safety Requirements UL1676 (510 kΩto 11 MΩ); DIN EN 60065, IEC 60065, clause 14.1.a);
VDE 0860, clause 14.1.a), CQC
Climatic Category (IEC 60068-1) 55/155/56
Stability After:
Load (1000 h, P70)ΔR max.: ± (1.5 % R + 0.1 Ω)
Long Term Damp Heat Test (56 Days) ΔR max.: ± (1.5 % R + 0.1 Ω)
Soldering (10 s, 260 °C) ΔR max.: ± (1.5 % R + 0.1 Ω)
Noise max. 2.5 µV/V
Document Number: 28734 For technical questions, contact: filmresistorsleaded@vishay.com www.vishay.com
Revision: 05-Oct-09 209
VR68
High Ohmic/High Voltage
Metal Glaze Leaded Resistors Vishay BCcomponents
Notes
(1) Please refer to table PACKAGING for details
• The PART NUMBER is shown to facilitate the introduction of a unified part numbering system for ordering products
DIMENSIONS
MARKING
The nominal resistance and tolerance are marked on the
resistor using four or five colored bands in accordance with
IEC 60062, marking codes for resistors and capacitors.
Yellow and grey are used instead of gold and silver because
metal particles in the lacquer could affect high-voltage
properties.
PART NUMBER
PART NUMBER: VR68000001503JAC00
MODEL/SIZE VARIANT TCR/MATERIAL VALUE TOLERANCE PAC K AG I N G (1) SPECIAL
VR68000 0 = Neutral
Z = Value overflow
(Special)
0 = Standard 3 digit value
1 digit multiplier
MULTIPLIER
3 = *103
4 = *104
5 = *105
F = ± 1 %
J = ± 5 %
AC
RD
The 2 digits
are used for all
special parts.
00 = Standard
PRODUCT DESCRIPTION: VR68 5 % AC 150K
VR68 5 % AC 150K
MODEL/SIZE TOLERANCE PACKAGING (1) RESISTANCE VALUE
VR68 ± 1 %
± 5 %
AC
RD
150K = 150 kΩ
8M2 = 8.2 MΩ
PACKAGING
MODEL TAPING
AMMO PACK REEL
PIECES CODE PIECES CODE
VR68 Axial, 66 mm 500 AC 750 RD
Ø D
L1
L2
Ø d
Outline
DIMENSIONS - resistor type and relevant physical dimensions
TYPE Ø Dmax. L1 max. L2 max. Ø d
VR68 6.8 18.0 19.0 0.78 ± 0.05
MASS PER UNIT
TYPE MASS
(mg)
VR68 169
806RV00001503JAC00
www.vishay.com For technical questions, contact: filmresistorsleaded@vishay.com Document Number: 28734
210 Revision: 05-Oct-09
VR68
Vishay BCcomponents High Ohmic/High Voltage
Metal Glaze Leaded Resistors
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 60294).
FUNCTIONAL PERFORMANCE
PRODUCT CHARACTERIZATION
Standard values of nominal resistance are taken from the
E96/E24/E12 series for resistors with a tolerance of ± 1 % or
5 %. The values of the E96/E24 series are in accordance
with IEC 60063.
Notes
(1) The maximum voltage that may be continuously applied to the resistor element, see IEC 60115-1
• The maximum permissible hot-spot temperature is 155 °C
Derating Pulse Loading Capability
LIMITING VALUES
TYPE
LIMITING VOLTAGE (1)
Umax. LIMITING POWER P70
(W)
DC RMS
VR68 10 000 7000 1.0
70 10050
00
50
100
155
- 55
T
amb (°C)
P
max.
(% rated)
P
Maximum dissipation (Pmax.) in percentage of rated power as a
function of the ambient temperature (Tamb)
Th
e power t
h
at t
h
e res
i
stor can
di
ss
i
pate
d
epen
d
s on t
h
e operat
i
ng
temperature.
4
6
8
10
10
2
20
10
- 2
101
R
n
(MΩ)
U
max.
(kV)
^
10
- 1
Maximum allowed peak pulse voltage in accordance with
IEC 60065, 14.1.a)”; 50 discharges from a 1 nF capacitor
charged to Umax.; 12 discharges/minute (drift ΔR/R ≤2 %)
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Revision: 05-Oct-09 211
VR68
High Ohmic/High Voltage
Metal Glaze Leaded Resistors Vishay BCcomponents
Application Information
TESTS AND REQUIREMENTS
Essentially all tests are carried out in accordance with
IEC 60115-1 specification, category LCT/UCT/56 (rated
temperature range: Lower Category Temperature, Upper
Category Temperature; damp heat, long term, 56 days).
The tests are carried out in accordance with IEC 60068-2-xx.
Test method under standard atmospheric conditions
according to IEC 60068-1, 5.3.
In the Test Procedures and Requirements table the test
and requirements are listed with reference to the relevant
clauses of IEC 60115-1 and IEC 60068-2-xx test methods. 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.
0 0.4 1.2
00.8
20
40
60
80
P
(W)
∆
T
(K)
Hot-spot temperature rise (ΔT) as a function of dissipated power
0 0.4 1.2
00.8
10
20
30
40
50
P
(W)
∆
T
(K) 10 mm
15 mm
Temperature rise (ΔT) at the lead end (soldering point) as a function
of dissipated power at various lead lengths after mounting
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
IEC
60068-2-
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
4.16 Robustness of terminations:
4.16.2 21 (Ua1) Tensile all samples Ø 0.8 mm; load 10 N; 10 s Number of failures < 10 x 10-6
4.16.3 21 (Ub) Bending half number
of samples Ø 0.8 mm; load 5 N; 4 x 90°Number of failures < 10 x 10-6
4.16.4 21 (Uc) Torsion other half
of samples 3 x 360° in opposite directions No damage
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.17 20 (Ta) Solderability 2s;235°C: Solder bath method; SnPb40
3 s; 245 °C: Solder bath method; SnAg3Cu0.5
Good tinning (≥ 95 % covered);
no damage
Solderability
(after aging)
8 h steam or 16 h 155 °C;
leads immersed 6 mm;
for 2 s at 235 °C; solder bath (SnPb40)
for 3 s at 245 °C; solder bath (SnAg3Cu0.5)
method
Good tinning (≥ 95 % covered);
no damage
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212 Revision: 05-Oct-09
VR68
Vishay BCcomponents High Ohmic/High Voltage
Metal Glaze Leaded Resistors
12NC INFORMATION FOR HISTORICAL CODING REFERENCE
•The resistors have a 12-digit numeric code starting with
2322 244
•The subsequent:
first digit for 1 % tolerance products (E24 and E96 series)
or 2 digits for 5 % (E24 series) indicate the resistor type
and packing
•The remaining digits indicate the resistance value:
- The first 3 digits for 1 % or 2 digits for 5 % tolerance
products indicate the resistance value
- The last digit indicates the resistance decade
Last Digit of 12NC Indicating Resistance Decade
12NC Example
The 12NC for a VR68, resistor value 7.5 MΩ, 5 % tolerance,
supplied on a bandolier of 500 units in ammopack, is:
2322 244 13755.
4.18 20 (Tb) Resistance to
soldering heat
thermal shock: 10 s; 260 °C;
3 mm from body ΔR max.: ± (0.5 % R + 0.05 Ω)
4.19 14 (Na) Rapid change of temperature 30 min at - 55 °C and
30 min at + 155 °C; 5 cycles ΔR max.: ± (0.5 % R + 0.05 Ω)
4.20 29 (Eb) Bump 3 x 1500 bumps in 3 directions; 40 g No damage
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.22 6 (Fc) Vibration
Frequency 10 Hz to 500 Hz;
displacement 1.5 mm or acceleration 10 g;
3 directions; total 6 h (3 x 2 h)
No damage
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.23 Climatic sequence:
4.23.2 2 (Ba) Dry heat 16 h; 155 °C
4.23.3 30 (Db) Damp heat (accelerated)
1st 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 °C to 35 °C
4.24 78 (Cab) Damp heat
(steady state)
56 days; 40 °C; 90 % to 95 % RH;
dissipation 0.01 P70;
limiting voltage U = 100 VDC
ΔR max.: ± (1.5 % R + 0.1 Ω)
4.25.1 Endurance 1000 h at 70 °C; P70 or Umax. ΔR max.: ± (1.5 % R + 0.1 Ω)
4.8 Temperature coefficient Between - 55 °C and + 155 °C≤± 200 ppm/K
4.7 Voltage proof on insulation URMS = 700 V during 1 min; V-block method No breakdown
4.12 Noise IEC 60195 Max. 2.5 µV/V
4.6.1.1 Insulation resistance U = 500 VDC during 1 min; V-block method Rins min.: 104MΩ
4.13 Short time overload
Room temperature;
dissipation 6.25 x P70 (voltage not more than
2 x limiting voltage; 10 000 V max.);
10 cycles; 5 s ON and 45 s OFF
ΔR max.: ± (2.0 % R + 0.05 Ω)
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
IEC
60068-2-
TEST
METHOD
TEST PROCEDURE REQUIREMENTS
RESISTANCE DECADE LAST DIGIT
100 kΩto 976 kΩ4
16 MΩto 9.76 MΩ5
≥ 10 MΩ6
12NC - Resistor type and packaging
TYPE
TAPE
WIDTH
(mm)
TOL.
(%)
2322 244 .....
BANDOLIER IN AMMOPACK BANDOLIER ON REEL
500
units
750
units
VR68 66.7 ± 1 8.... 6....
± 5 13... 23...
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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