High Ohmic (up to 68 MΩ)/High Voltage (up to 10 kV) Resistors
www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 28734
180 Revision: 04-Aug-06
VR68
Vishay BCcomponents
FEATURES
•Lead (Pb)-free solder contacts
•
These resistors meet the safety requirements of:
“UL1676” (510 kΩ to 11 MΩ); File No: E171160
“IEC 60065”
“EN60065”
“VDE 0860” (Germany)
“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
•Compatible with "Restriction of the use of Hazardous
Substances" (RoHS) directive 2002/95/EC (issue 2004)
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
REG.-Nr. 40003697
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 “MIL-STD 202E, method 215” and
“IEC 60068-2-45”.
Note
1. Ohmic values (other than resistance range) are available upon request.
TECHNICAL SPECIFICATIONS
DESCRIPTION VALUE
Resistance range1) 100 kΩto 68 MΩ
Resistance tolerance and series ± 1 %: E24/E96 series;
± 5 %: E24 series
Maximum dissipation at Tamb =70°C1W
Thermal resistance, Rth 70 K/W
Temperature coefficient ≤ ± 200 ×10-6/K
Maximum permissible voltage:
DC 10 000 V
RMS 7000 V
Dielectric withstanding voltage of the insulation for 1 minute 700 V
Basic specifications IEC 60115-1B
Safety requirements UL1676 (510 kΩto 11 MΩ); EN60065; VDE 0860; CQC
Climatic category (IEC 60068) 55/155/56
Stability after:
load (1000 hours) ΔR max.: ± (1.5 % R + 0.1 Ω)
accelerated damp heat test (6 days) ΔR max.: ± (1.5 % R + 0.1 Ω)
long term damp heat test (56 days) ΔR max.: ± (1.5 % R + 0.1 Ω)
Noise max. 2.5 µV/V
Document Number: 28734 For technical questions, contact: ff3dresistors@vishay.com www.vishay.com
Revision: 04-Aug-06 181
VR68
High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors Vishay BCcomponents
12NC INFORMATION
•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.
RESISTANCE DECADE LAST DIGIT
100 to 976 kΩ4
1to9.76MΩ5
≥ 10 MΩ6
Note
Products can be ordered using either the 12NC or the PART NUMBER. The PART NUMBER is shown to facilitate the introduction of a unified
part numbering system. Currently, this PART NUMBER is applicable in the Americas and Asia only.
12NC - resistor type and packing
TYPE
TAPE
WIDTH
(mm)
TOL.
(%)
ORDERING CODE 2322 244 .....
BANDOLIER IN AMMOPACK BANDOLIER ON REEL
500
units
750
units
VR68 66.7 ± 1 8.... -
± 5 13... 23...
PART NUMBER
PART NUMBER: VR68000001503JAC00
MODEL/SIZE SPECIAL CHARACTER TCR/MATERIAL VALUE TOLERANCE PA C 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 PACKAGING1) RESISTANCE VALUE
VR68 ± 1 %
± 5 %
AC
RD
150K = 150 kΩ
8M2 = 8.2 MΩ
1) Please refer to table PACKAGING for details.
PACKAGING
CODE PIECES DESCRIPTION MODEL/SIZE
AC 500 Bandolier in ammopack straight leads
VR68
RD 750 Bandolier on reel straight leads
806RV00001503JAC00
www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 28734
182 Revision: 04-Aug-06
VR68
Vishay BCcomponents High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors
DIMENSIONS
MARKING
The nominal resistance and tolerance are marked on the
resistor using four or five colored bands in accordance with
IEC publication 60062 “Color codes for fixed resistors”.
Yellow and grey are used instead of gold and silver because
metal particles in the lacquer could affect high-voltage
properties.
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”).
∅ D
L
1
L
2
∅ d
Outline
DIMENSIONS - resistor type and relevant physical dimensions
TYPE ∅ D
MAX.
L1
MAX.
L2
MAX. ∅ d
VR68 6.8 18.0 19.0 0.78 ± 0.05
MASS PER 100 UNITS
TYPE MASS
(g)
VR68 169.1
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 publication 60063”.
Note
1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60115-1”.
The maximum permissible hot-spot temperature is 155 °C.
LIMITING VALUES
TYPE
LIMITING VOLTAGE1)
(V) LIMITING POWER
(W)
DC RMS
VR68 10 000 7000 1.0
Document Number: 28734 For technical questions, contact: ff3dresistors@vishay.com www.vishay.com
Revision: 04-Aug-06 183
VR68
High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors Vishay BCcomponents
Derating Pulse Loading Capability
70 10050
0
0
50
100
155
- 55
T
amb
(°C)
P
max
(%P
rated
)
Maximum dissipation (Pmax) in percentage of rated power
as a function of the ambient temperature (Tamb)
The power that the resistor can dissipate depends on the operating
temperature.
4
6
8
10
102
20
10-2 101 Rn (MΩ)
Vmax
(kV)
^
10-1
Maximum allowed peak pulse voltage in accordance with
“IEC 60065 chapter 14.1”; 50 discharges from a 1 nF capacitor
charged to ; 12 discharges/minute (drift ΔR/R ≤2 %)Vmax
Application Information
0 0.4 1.2
00.8
20
40
60
80
P (W)
ΔT
(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)
ΔT
(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
www.vishay.com For technical questions, contact: ff3dresistors@vishay.com Document Number: 28734
184 Revision: 04-Aug-06
VR68
Vishay BCcomponents High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors
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 test
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.
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 ∅ 0.8 mm; load 10 N; 10 s number of failures < 10 ×10−6
4.16.3 21 (Ub) bending half number
of samples
∅ 0.8 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
ΔR max.: ± (0.5 % R + 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;
3 mm from body
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.19 14 (Na) rapid change of temperature 30 minutes at - 55 °C and
30 minutes at + 155 °C; 5 cycles
ΔR max.: ± (0.5 % R + 0.05 Ω)
4.20 29 (Eb) bump 3 ×1500 bumps in 3 directions; 40 g no damage
ΔR max.: ± (0.5 % R + 0.05 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
ΔR max.: ± (0.5 % R + 0.05 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
Document Number: 28734 For technical questions, contact: ff3dresistors@vishay.com www.vishay.com
Revision: 04-Aug-06 185
VR68
High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors Vishay BCcomponents
4.23.6 30 (Db) damp heat (accelerated)
remaining cycles
5days; 55°C; 95 to 100 % RH Rins min.: 103MΩ
ΔR max.: ± (1.5 % R + 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 100 V (DC)
ΔR max.: ± (1.5 % R + 0.1 Ω)
4.25.1 endurance 1000 hours at 70 °C; Pn or Vmax ΔR max.: ± (1.5 % R + 0.1 Ω)
4.8.4 temperature coefficient between - 55 °C and + 155 °C
(TC ×10-6/K)
≤± 200
4.7 voltage proof on insulation 700 V (RMS) during 1 minute; V-block method no breakdown
4.12 noise “IEC publication 60195” max. 2.5 µV/V
4.6.1.1 insulation resistance 500 V (DC) during 1 minute; V-block method Rins min.: 104MΩ
4.13 short time overload room temperature;
dissipation 6.25 ×Pn (voltage not more than
2×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
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
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