VR25, VR37, VR68

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Vishay BCcomponents

Revision: 02-Jun-2022

1

Document Number: 28907

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

High Ohmic / High Voltage Metal Glaze Leaded Resistors

LINKS TO ADDITIONAL RESOURCES

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. This coating is not resistant to aggressive fluxes

and cleaning solvents. The encapsulation is resistant to all

cleaning solvents in accordance with IEC 60068-2-45.

FEATURES

• UL approved (UL1676, file no: E171160)

• Meet the safety requirements of:

- IEC 62368-1

- CQC (China)

• AEC-Q200 qualified (VR25, VR37)

• High pulse loading capability (maximum 10 kV)

• Radial version available for VR25

• Material categorization: for definitions of compliance

APPLICATIONS

• Where high resistance, high stability, and high reliability at

high voltage are required

• High humidity environment

• White goods

• Power supplies

• Automotive electronics

Note

333

DDD3 D

3D Models

TECHNICAL SPECIFICATIONS

DESCRIPTION

VR25

VR37

VR68

DIN size

0207

0309

0718

100 k

Ω to 22 MΩ

100 k

Ω to 33 MΩ

100 k

Ω to 68 MΩ

Resistance tolerance

± 10 %; ± 5 %; ± 1 %

Temperature coefficient

≤ ± 200 ppm/K

0.25 W

0.5 W

1.0 W

1600 V

3500 V

10 000 V

Operating temperature range

-55 °C to +155 °C

Permissible film temperature

155 °C

140 K/W

120 K/W

70 K/W

Insulation voltage:

700 V

Maximum noise (white noise)

5 μV/V

2.5 μV/V

2.5 μV/V

Max. resistance change at

rated dissipation for resistance range,

|

ΔR/R| max., after 1000 h

1.5 %

1.5 %

1.5 %

SAFETY REQUIREMENTS AND QUALIFICATIONS

DESCRIPTION

VR25, VR37

VR37

VR68

Safety requirements / qualifications

AEC-Q200

UL1676 qualification (file no: E171160)

for ohmic range 510 k

Ω to 11 MΩ;

IEC 62368-1;

CQC