High Voltage

Thick Film Resistors

VRW Series

IEC 60065

size

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability.

All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

Electrical Data

Issue C · 07.06

A subsidiary of

TT electronics plc

Welwyn Components

70

7

3

W

R

V

5

2

W

R

V

5

.

0

5

2

.

0

s

t

t

a

w

C

˚

0

7

t

a

g

n

i

t

a

r

r

e

w

o

P

M

0

1

o

t

K

0

0

1

M

0

3

o

t

K

0

0

1

)

s

m

h

O

(

e

g

n

a

r

e

c

n

a

t

s

i

s

e

R

0

0

5

3

0

0

6

1

k

a

e

p

c

a

r

o

c

d

s

t

l

o

v

e

g

a

t

l

o

v

t

n

e

m

e

l

e

g

n

i

t

i

m

i

L

0

0

7

s

t

l

o

v

e

g

a

t

l

o

v

n

o

i

t

a

l

o

s

I

0

0

2

C

˚

/

m

p

p

R

C

T

5

,

2

,

1

%

e

c

n

a

r

e

l

o

T

e

c

n

a

t

s

i

s

e

R

Standard Values

E24 preferred

2

1

1

0

4

1

t

t

a

w

/

C

˚

e

c

n

a

d

e

p

m

I

l

a

m

r

e

h

T

C

˚

5

5

1

+

o

t

5

5

-

C

˚

e

g

n

a

r

e

r

u

t

a

r

e

p

m

e

t

t

n

e

i

b

m

A

Type

L

D

f

d

PCB

Min

Wt.

Max

Max

min

Nom

mount

bend

nom

centres

radius

VRW25

6.2

2.5

21

0.6

10.2

0.6

0.3

VRW37

9.0

3.7

19.6

0.8

12.7

1.2

0.5

L

D

f

d

Construction

Resistive thick film material is applied to high-grade ceramic

rods. Tin-plated steel caps are force fitted and the

termination wires are welded to the caps. The value is

obtained by a helical cut in the film and finally the resistor

body is protected by a cement coating applied so that the

terminations remain completely clear.

Marking

1% tolerance resistors are colour coded with 5 bands. 2%

and 5% tolerance have 4 bands. IEC62 colours are used.

Terminations

Material:

Hot tin dipped copper wire

Strength:

The terminations meet the requirements

of IEC 68.2.21

Solderability:

The terminations meet the requirements

of IEC 115-1 Clause 4.17.3.2

Marking

The body protection and marking are resistant to all normal

industrial cleaning solvents suitable for printed circuits.

Flammability

The resistor coating will not burn under any condition of

applied temperature or power overload.

Issue D · 01.07