VR68
Vishay BCcomponents
High Ohmic (up to 68 MΩ)/High Voltage (up to 10 kV) Resistors
FEATURES
•
Lead (Pb)-free solder contacts
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”.
•
These resistors meet the safety requirements of:
“UL1676” (510 kΩ to 11 MΩ); File No: E171160
“IEC 60065”
“EN60065”
REG.-Nr. 40003697
“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
TECHNICAL SPECIFICATIONS
DESCRIPTION
Resistance
range
1)
VALUE
100 kΩ to 68 MΩ
± 1 %: E24/E96 series;
± 5 %: E24 series
1W
70 K/W
≤
± 200
×
10
-6
/K
Resistance tolerance and series
Maximum dissipation at T
amb
= 70
°C
Thermal resistance,
R
th
Temperature coefficient
Maximum permissible voltage:
DC
RMS
Dielectric withstanding voltage of the insulation for 1 minute
Basic specifications
Safety requirements
Climatic category (IEC 60068)
Stability after:
load (1000 hours)
accelerated damp heat test (6 days)
long term damp heat test (56 days)
Noise
Note
1. Ohmic values (other than resistance range) are available upon request.
10 000 V
7000 V
700 V
IEC 60115-1B
UL1676 (510 kΩ to 11 MΩ); EN60065; VDE 0860; CQC
55/155/56
ΔR
max.: ± (1.5 %
R
+ 0.1
Ω)
ΔR
max.: ± (1.5 %
R
+ 0.1
Ω)
ΔR
max.: ± (1.5 %
R
+ 0.1
Ω)
max. 2.5 µV/V
www.vishay.com
188
For technical questions, contact: ff3dresistors@vishay.com
Document Number: 28734
Revision: 07-May-07
VR68
High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors
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
RESISTANCE DECADE
100 to 976 kΩ
1 to 9.76 MΩ
≥
10 MΩ
LAST DIGIT
4
5
6
Vishay BCcomponents
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.
12NC
- resistor type and packing
ORDERING CODE 2322 244 .....
TYPE
TAPE
WIDTH
(mm)
TOL.
(%)
±1
±5
BANDOLIER IN AMMOPACK
500
units
8....
13...
BANDOLIER ON REEL
750
units
6....
23...
VR68
66.7
PART NUMBER
PART NUMBER: VR68000001503JAC00
V
MODEL/SIZE
VR68000
R
6
8
0
0
0
0
0
1
5
0
3
J
A
C
0
0
SPECIAL
The 2 digits
are used for
all special
parts.
00
= standard
SPECIAL CHARACTER
0
= neutral
Z
= value overflow
(Special)
TCR/MATERIAL
0
= standard
VALUE
3 digit value
1 digit multiplier
Multiplier:
3
= *10
3
4
= *10
4
5
= *10
5
TOLERANCE
F
=±1%
J
=±5%
PACKAGING
1)
AC
RD
PRODUCT DESCRIPTION: VR68 5 % AC 150K
VR68
MODEL/SIZE
VR68
1)
5%
TOLERANCE
±
1
%
±
5
%
AC
PACKAGING
1)
AC
RD
150K
RESISTANCE VALUE
150K
= 150 kΩ
8M2
= 8.2 MΩ
Please refer to table PACKAGING for details.
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.
PACKAGING
CODE
AC
RD
PIECES
500
750
DESCRIPTION
Bandolier in ammopack straight leads
VR68
Bandolier on reel straight leads
MODEL/SIZE
Document Number: 28734
Revision: 07-May-07
For technical questions, contact: ff3dresistors@vishay.com
www.vishay.com
189
VR68
Vishay BCcomponents
DIMENSIONS
L
1
High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors
∅
d
∅
D
L
2
Outline
DIMENSIONS
- resistor type and relevant physical dimensions
TYPE
VR68
∅
D
MAX.
6.8
L
1
MAX.
18.0
L
2
MAX.
19.0
∅
d
0.78 ± 0.05
MASS PER 100 UNITS
TYPE
VR68
MASS
(g)
169.1
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 (L
1
) 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”).
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”.
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”.
LIMITING VALUES
TYPE
DC
VR68
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.
10 000
LIMITING VOLTAGE
1)
(V)
RMS
7000
1.0
LIMITING POWER
(W)
www.vishay.com
190
For technical questions, contact: ff3dresistors@vishay.com
Document Number: 28734
Revision: 07-May-07
VR68
High Ohmic (up to 68 MΩ)/
Vishay BCcomponents
High Voltage (up to 10 kV) Resistors
The power that the resistor can dissipate depends on the operating
temperature.
20
^
V
max
(kV)
P
max
(%P
rated
)
100
10
8
50
6
0
- 55
0
50
70
100
155
T
amb
(°C)
4
10
-2
10
-1
1
10
10
2
R
n
(MΩ)
Maximum dissipation (P
max
) in percentage of rated power
as a function of the ambient temperature (T
amb
)
Maximum allowed peak pulse voltage in accordance with
“IEC 60065 chapter 14.1”; 50 discharges from a 1 nF capacitor
charged to V
max
; 12 discharges/minute (drift
ΔR/R ≤
2 %)
Derating
Pulse Loading Capability
80
ΔT
(K)
60
50
ΔT
(K)
40
10 mm
30
15 mm
40
20
20
10
0
0
0
0.4
0.8
P (W)
1.2
0
0.4
0.8
P (W)
1.2
Hot-spot temperature rise (ΔT) as a function of dissipated power
Temperature rise (ΔT) at the lead end (soldering point) as a function
of dissipated power at various lead lengths after mounting
Application Information
Document Number: 28734
Revision: 07-May-07
For technical questions, contact: ff3dresistors@vishay.com
www.vishay.com
191
VR68
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 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.
High Ohmic (up to 68 MΩ)/
High Voltage (up to 10 kV) Resistors
TEST PROCEDURES AND REQUIREMENTS
IEC
60115-1
CLAUSE
4.16
IEC
60068-2
TEST
METHOD
21 (U)
TEST
PROCEDURE
REQUIREMENTS
robustness of terminations:
∅
0.8 mm; load 10 N; 10 s
∅
0.8 mm; load 5 N; 4
×
90°
3
×
360° in opposite directions
2 s; 235
°C
thermal shock: 3 s; 350
°C;
3 mm from body
30 minutes at - 55
°C
and
30 minutes at + 155
°C;
5 cycles
3
×
1500 bumps in 3 directions; 40 g
number of failures
<
10
×
10
−6
number of failures
<
10
×
10
−6
4.16.2
21 (Ua1)
tensile all samples
4.16.3
21 (Ub)
bending half number
of samples
torsion other half
of samples
solderability
4.16.4
21 (Uc)
no damage
ΔR
max.: ± (0.5 %
R
+ 0.05
Ω)
good tinning; no damage
ΔR
max.: ± (0.5 %
R
+ 0.05
Ω)
ΔR
max.: ± (0.5 %
R
+ 0.05
Ω)
4.17
20 (Ta)
4.18
20 (Tb)
resistance to
soldering heat
rapid change of temperature
4.19
14 (Na)
4.20
29 (Eb)
bump
no damage
ΔR
max.: ± (0.5 %
R
+ 0.05
Ω)
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)
4.23
climatic sequence:
16 hours; 155
°C
24 hours; 55
°C;
90 to 100 % RH
2 hours; - 55
°C
2 hours; 8.5 kPa; 15 to 35
°C
4.23.2
2 (Ba)
dry heat
4.23.3
30 (Db)
damp heat (accelerated) 1
st
cycle
cold
4.23.4
1 (Aa)
4.23.5
13 (M)
low air pressure
www.vishay.com
192
For technical questions, contact: ff3dresistors@vishay.com
Document Number: 28734
Revision: 07-May-07
