Tubular Vitreous Enamelled

Wirewound Resistors

1600/1900 Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

124

09.09

Welwyn Components

Table 3

Adjustable Resistors (see Figure 9)

Adjustable resistors use the same basic construction as fixed

resistors already described, and have a window in the vitreous

enamel through which contact is made to the resistive

element by a sliding contact band. The band is fitted with a

clamping screw and nut to retain it firmly in position.

The adjustable winding style has a maximum permissible hot

spot temperature of 300°C and the maximum dissipation, for

an ambient temperature of 20°C, is specified in Table 4. The

partial open winding necessitates a reduced maximum

resistance, when compared with fixed resistors, and the

resistance range is also defined in Table 4.

More than one adjusting band can be fitted, up to the

maximum number specified in Table 3.

Adjustable resistors are available in termination styles B, 4B,

AP, C, CB and CP, in sizes 1602 to 1609 inclusive and 1906

and 1908 denoted by prefix ‘V’.

Manufactured Values

E24 preferred

Standard Selection Tolerance ±10%

All other details of the electrical and environmental

performance of adjustable resistors are the same as for

fixed resistors.

Max. dissipation in

Resistance range (ohms)

20°C ambient (watts)

Type

Min. for

Min. for

Max. for

200°C

300°C

styles VC,

all other

all styles

hot spot

hot spot

VCP

styles

1602

8

15.5

4

3

1.6k

1906

9.5

19

4

3

2.5k

1603

11

22

6

6

3.0k

1604

16

31

8

8

5.3k

1605

21

41

6

6

4.5k

1908

24

47

11

10

7.5k

1607

34

66

11

9

8.1k

1606

41

80

14

13

13.2k

1608

52

101

17

16

15.4k

1609

74

145

25

24

25.5k

Tube

A mm

B mm

Hole C

Max. no of

size

max.

max.

dia. mm

adjusting

bands

1602

1603

20

27

3.2

1

1906

1604

1605

20

27

3.2

3

1908

25

32

3.7

2

1606

25

32

3.7

4

1607

30

38

3.7

2

1608

30

38

3.7

3

1609

30

38

3.7

5

Table 4

Tubular Vitreous Enamelled

Wirewound Resistors

1600/1900 Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

124

09.09

Welwyn Components

Table 3

Adjustable Resistors (see Figure 9)

Adjustable resistors use the same basic construction as fixed

resistors already described, and have a window in the vitreous

enamel through which contact is made to the resistive

element by a sliding contact band. The band is fitted with a

clamping screw and nut to retain it firmly in position.

The adjustable winding style has a maximum permissible hot

spot temperature of 300°C and the maximum dissipation, for

an ambient temperature of 20°C, is specified in Table 4. The

partial open winding necessitates a reduced maximum

resistance, when compared with fixed resistors, and the

resistance range is also defined in Table 4.

More than one adjusting band can be fitted, up to the

maximum number specified in Table 3.

Adjustable resistors are available in termination styles B, 4B,

AP, C, CB and CP, in sizes 1602 to 1609 inclusive and 1906

and 1908 denoted by prefix ‘V’.

Manufactured Values

E24 preferred

Standard Selection Tolerance ±10%

All other details of the electrical and environmental

performance of adjustable resistors are the same as for

fixed resistors.

Max. dissipation in

Resistance range (ohms)

20°C ambient (watts)

Type

Min. for

Min. for

Max. for

200°C

300°C

styles VC,

all other

all styles

hot spot

hot spot

VCP

styles

1602

8

15.5

4

3

1.6k

1906

9.5

19

4

3

2.5k

1603

11

22

6

6

3.0k

1604

16

31

8

8

5.3k

1605

21

41

6

6

4.5k

1908

24

47

11

10

7.5k

1607

34

66

11

9

8.1k

1606

41

80

14

13

13.2k

1608

52

101

17

16

15.4k

1609

74

145

25

24

25.5k

Tube

A mm

B mm

Hole C

Max. no of

size

max.

max.

dia. mm

adjusting

bands

1602

1603

20

27

3.2

1

1906

1604

1605

20

27

3.2

3

1908

25

32

3.7

2

1606

25

32

3.7

4

1607

30

38

3.7

2

1608

30

38

3.7

3

1609

30

38

3.7

5

Table 4

Tubular Vitreous Enamelled

Wirewound Resistors

1600/1900 Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

124

09.09

Welwyn Components

Table 3

Adjustable Resistors (see Figure 9)

Adjustable resistors use the same basic construction as fixed

resistors already described, and have a window in the vitreous

enamel through which contact is made to the resistive

element by a sliding contact band. The band is fitted with a

clamping screw and nut to retain it firmly in position.

The adjustable winding style has a maximum permissible hot

spot temperature of 300°C and the maximum dissipation, for

an ambient temperature of 20°C, is specified in Table 4. The

partial open winding necessitates a reduced maximum

resistance, when compared with fixed resistors, and the

resistance range is also defined in Table 4.

More than one adjusting band can be fitted, up to the

maximum number specified in Table 3.

Adjustable resistors are available in termination styles B, 4B,

AP, C, CB and CP, in sizes 1602 to 1609 inclusive and 1906

and 1908 denoted by prefix ‘V’.

Manufactured Values

E24 preferred

Standard Selection Tolerance ±10%

All other details of the electrical and environmental

performance of adjustable resistors are the same as for

fixed resistors.

Max. dissipation in

Resistance range (ohms)

20°C ambient (watts)

Type

Min. for

Min. for

Max. for

200°C

300°C

styles VC,

all other

all styles

hot spot

hot spot

VCP

styles

1602

8

15.5

4

3

1.6k

1906

9.5

19

4

3

2.5k

1603

11

22

6

6

3.0k

1604

16

31

8

8

5.3k

1605

21

41

6

6

4.5k

1908

24

47

11

10

7.5k

1607

34

66

11

9

8.1k

1606

41

80

14

13

13.2k

1608

52

101

17

16

15.4k

1609

74

145

25

24

25.5k

Tube

A mm

B mm

Hole C

Max. no of

size

max.

max.

dia. mm

adjusting

bands

1602

1603

20

27

3.2

1

1906

1604

1605

20

27

3.2

3

1908

25

32

3.7

2

1606

25

32

3.7

4

1607

30

38

3.7

2

1608

30

38

3.7

3

1609

30

38

3.7

5

Table 4

Tubular Vitreous Enamelled

Wirewound Resistors

1600/1900 Series

© Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK

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

124

09.09

Welwyn Components

Table 3

Adjustable Resistors (see Figure 9)

Adjustable resistors use the same basic construction as fixed

resistors already described, and have a window in the vitreous

enamel through which contact is made to the resistive

element by a sliding contact band. The band is fitted with a

clamping screw and nut to retain it firmly in position.

The adjustable winding style has a maximum permissible hot

spot temperature of 300°C and the maximum dissipation, for

an ambient temperature of 20°C, is specified in Table 4. The

partial open winding necessitates a reduced maximum

resistance, when compared with fixed resistors, and the

resistance range is also defined in Table 4.

More than one adjusting band can be fitted, up to the

maximum number specified in Table 3.

Adjustable resistors are available in termination styles B, 4B,

AP, C, CB and CP, in sizes 1602 to 1609 inclusive and 1906

and 1908 denoted by prefix ‘V’.

Manufactured Values

E24 preferred

Standard Selection Tolerance ±10%

All other details of the electrical and environmental

performance of adjustable resistors are the same as for

fixed resistors.

Max. dissipation in

Resistance range (ohms)

20°C ambient (watts)

Type

Min. for

Min. for

Max. for

200°C

300°C

styles VC,

all other

all styles

hot spot

hot spot

VCP

styles

1602

8

15.5

4

3

1.6k

1906

9.5

19

4

3

2.5k

1603

11

22

6

6

3.0k

1604

16

31

8

8

5.3k

1605

21

41

6

6

4.5k

1908

24

47

11

10

7.5k

1607

34

66

11

9

8.1k

1606

41

80

14

13

13.2k

1608

52

101

17

16

15.4k

1609

74

145

25

24

25.5k

Tube

A mm

B mm

Hole C

Max. no of

size

max.

max.

dia. mm

adjusting

bands

1602

1603

20

27

3.2

1

1906

1604

1605

20

27

3.2

3

1908

25

32

3.7

2

1606

25

32

3.7

4

1607

30

38

3.7

2

1608

30

38

3.7

3

1609

30

38

3.7

5

Table 4

01.21

General Note

TT Electronics reserves the right to make changes in product specification without notice or liability.

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

© TT Electronics plc

www.ttelectronics.com/resistors

BI Technologies IRC Welwyn

Tubular Vitreous Enamelled Wirewound Resistors

1600/1900 Series