www.vishay.com

For technical questions contact: ff3dresistors@vishay.com

Document Number: 28733

2

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 MΩ, 5 %

tolerance, supplied on a bandolier of 1000 units in

ammopack, is: 2322 242 13755.

RESISTANCE DECADE

LAST DIGIT

100 to 976 kΩ

4

1 to 9.76 MΩ

5

≥10 MΩ

6

DIMENSIONS

∅D

∅d

Outline.

DIMENSIONS

- resistor type and relevant physical dimensions

TYPE

∅

∅

∅

∅D

MAX.

MAX.

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

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”).

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 ± 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

(V)

LIMITING POWER

(W)

DC

RMS

VR37

3500

2500

0.5