VR37

www.vishay.com

Vishay BCcomponents

Revision: 17-Aug-11

5

Document Number: 28733

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

12NC INFORMATION FOR HISTORICAL CODING REFERENCE

• The resistors have a 12-digit numeric 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 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 VR37, resistor value 7.5 M

,5 % tolerance,

supplied on a bandolier of 1000 units in ammopack, is:

2322 242 13755.

4.22

6 (Fc)

Vibration

Frequency 10 Hz to 500 Hz; displacement

1.5 mm or acceleration 10 g; 3 directions;

total 6 h (3 x 2 h)

No damage

R max.: ± (0.5 % R + 0.05 )

4.23

Climatic sequence:

4.23.2

2 (Ba)

Dry heat

16 h; 155 °C

4.23.3

30 (Db)

Damp heat (accelerated)

24 h; 55 °C; 90 % to 100 % RH

4.23.4

1 (Aa)

Cold

2 h; - 55 °C

4.23.5

13 (M)

Low air pressure

2 h; 8.5 kPa; 15 °C to 35 °C

4.23.6

30 (Db)

Damp heat (accelerated)

remaining cycles

5 days; 55 °C; 95 % to 100 % RH

R max.: ± (1.5 % R + 0.1 )

4.24

78 (Cab)

Damp heat

(steady state)

56 days; 40 °C; 90 % to 95 % RH;

R max.: ± (1.5 % R + 0.1 )

4.25.1

Endurance

R max.: ± (1.5 % R + 0.1 )

4.8

Temperature coefficient

Between - 55 °C and + 155 °C

 ± 200 ppm/K

4.7

Voltage proof on insulation

V-block method

No breakdown

4.12

Noise

IEC 60195

Max. 2.5 μV/V

4.6.1.1

Insulation resistance

V-block method

4.13

Short time overload

Room temperature;

than 2 x limiting voltage); 10 cycles;

5s ON and 45 s OFF

R max.: ± (2.0 % R + 0.05 )

TEST PROCEDURES AND REQUIREMENTS

IEC

60115-1

CLAUSE

IEC

60068-2-

TEST

METHOD

TEST

PROCEDURE

REQUIREMENTS

RESISTANCE DECADE

LAST DIGIT

100 k

 to 976 k

4

1M

 to 9.76 M

5

 10 M

6

12NC - Resistor type and packaging

TYPE

TAPE WIDTH

(mm)

TOL.

(%)

2322 242 .....

BANDOLIER IN AMMOPACK

BANDOLIER ON REEL

1000 UNITS

5000 UNITS

VR37

52

± 1

8....

6....

± 5

13...

23...