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Document Number: 28733
Revision: 24-Feb-04
VR37
Vishay BCcomponents
High Ohmic/High Voltage Resistors
ORDERING INFORMATION
Ordering Code (12NC)
The resistors have a 12-digit ordering code starting with
2322 242.
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 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
Ordering Example
The ordering code for a VR37, resistor value 7.5 M
tolerance, supplied on a bandolier of 1000 units in
ammopack, is: 2322 242 13755.
, 5 %
RESISTANCE DECADE
LAST DIGIT
100 to 976 k
1 to 9.76 M
≥
10 M
4
5
6
DIMENSIONS
D
L
1
L
2
d
Outline.
DIMENSIONS
- resistor type and relevant physical dimensions
TYPE
MAX.
D
L
1
MAX.
L
2
MAX.
d
VR37
4.0
9.0
10.0
0.7
±
0.03
MARKING
The nominal resistance and tolerance are marked on the
resistor using four or five coloured bands in accordance with
IEC publication 60062 “Colour 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 (L
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”).
1
) is measured by inserting the leads
MASS PER 100 UNITS
TYPE
MASS
(g)
VR37
53
FUNCTIONAL PERFORMANCE
PRODUCT CHARACTERIZATION
Standard values of nominal resistance are taken from the E96/E24/E12 series for resistors with a tolerance of
values of the E96/E24 series are in accordance with “IEC publication 60063”.
±
1 % or 5 %. The
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 VOLTAGE
(V)
(1)
LIMITING POWER
(W)
DC
RMS
VR37
3500
2500
0.5