2024年6月6日发(作者：凤淼淼)

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Welwyn Components

•2 watts to 25 watts

•

0.10 ohms to 30K ohms

•

±10% or ±5% tolerance

•

TC’s from 300 ppm/°C to +5500 ppm/°C

Electrical Data

PW-2

Power rating at 25°C

Resistance range

over R range

watts

ohms

0.03%/°C

+0.55%/°C

+0.45%/°C

+0.25%/°C

2

0R15 to 2K4

0.15 to 0.99

1.0 to 2.4K

0.1 to 30

0.24 to 130

1.0 to 10

PW-3

3

0R1 to 7K5

0.1 to 0.99

1.0 to 7.5K

0.1 to 86

0.1 to 270

0.24 to 20

PW-5

5

0R1 to 8K5

0.1 to 0.99

1.0 to 8.5K

0.1 to 68

0.1 to 300

0.27 to 22

PW-7

7

0R1 to 18K

0.1 to 0.99

1.0 to 18K

0.1 to 150

0.15 to 680

1.0 to 51

PW-10

10

0R18 to 30K

0.18 to 0.99

1.0 to 30K

0.1 to 240

1.0 to 82

PW-15

15

0R18 to 30K

0.18 to 0.99

1.0 to 30K

0.1 to 240

1.0 to 82

PW-18

18

0R18 to 22K

0.18 to 0.99

1.0 to 22K

0.1 to 200

1.0 to 70

PW-22

22

0R27 to 18K

0.27 to 1.3

1.5 to 12K

0.15 to 360

1.0 to 120

PW-25

25

0R27 to 18K

0.27 to 1.3

1.5 to 10K

0.15 to 300

1.5 to 100

Temperature coefficient0.06%/°C

0.24 to 11000.24 to 11000.24 to 11000.36 to 18000.36 to 1200

Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)

Physical Data

Dimensions (mm)

L ±0.8

PW-2

PW-3

PW-5

PW-7

PW-10

PW-15

PW-18

PW-22

PW-25

17.5

22.4

22.4

35.3

47.8

47.8

47.8

63.5

63.5

W ±0.8

6.35

7.87

9.65

9.65

9.65

12.7

12.7

12.7

12.7

H ±0.8

6.35

7.87

8.64

8.64

8.64

12.7

12.7

12.7

12.7

d dia.

0.8

0.91

0.91

0.91

0.91

0.91

0.91

1.0*

1.0*

E ±0.8

7.87

9.65

10.4

11.9

11.9

16.0

16.0

16.0

16.0

LL min.

36.6

36.6

38.1

38.1

38.1

38.1

38.1

38.1

38.1

F (ref.)

1.60

1.60

1.60

3.18

3.18

3.18

3.18

3.18

3.18

* Copper Clad Steel

Standard Configuration

d

LLL

0.125 max.

Alternate Configuration

W

H

F

E

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.

A subsidiary of

TTelectronics plc

Issue B · 03.02

© Welwyn Components Limited

· Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

111

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Power Derating

100

P

e

r

c

e

n

t

o

f

R

a

t

e

d

L

o

a

d

80

PW-3, 5, 7, 10

60

PW-15, 18, 22, 25

40

20

0

254085

300

PW-2

T

e

m

p

e

r

a

t

u

r

e

R

i

s

e

(

°

C

)

250

200

150

100

50

0

120

Percent of Rated Load

PW-22, 25

PW-15, 18

PW-10

PW-7

PW-5

PW-3

Welwyn Components

Temperature Rise

Ambient Temperature (°C)

250

Packaging

Resistors are supplied bulk packed. Quantity 500.

© Welwyn Components Limited

Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

112

Issue B · 03.02

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Welwyn Components

•20 watts to 50 watts

•

0.10 ohms to 2.0K ohms

•

±10% or ±5% tolerance

•

Customs

Electrical Data

PW-20E

Power rating at 25°C

Resistance range

watts

ohms

20

0R1 to 2K

PW-30

30

0R5 to 1K2

PW-40

40

0R65 to 1K5

PW-50E

50

0R08 to 1K8

Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)

Dimensions (Inches)

A ±0.030

PW-20E1.875

PW-302.00

PW-402.45

PW-50E3.075

PW-20E Wirewound

B ±0.060

2.50

2.55

3.00

3.625

0.250 (Typ.)

5/32 Dia. Thru (2)

0.157±0.020

0.032±0.0025

PW-30, 40 and 50E Wirewound

5/32 Dia. Thru (2)

A

0.282±0.020

0.75±0.030

A

0.032±0.0025

0.25

B

0.375

0.75

Power Derating

100

80

60

40

20

0

P

e

r

c

e

n

t

o

f

R

a

t

e

d

L

o

a

d

PW-20E, PW-30, PW-40

PW-50E without bracket

0.5±0.030

0.5±0.030

0.75±0.030

0.875

0.205 or 0.187±0.005

0.069±0.005

0.25±0.031

0.125±0.015

0.200 (Typ.)

0.135±0.015

Ambient Temperature (°C)

250

PW-20E Alternate Terminal ConfigurationPrinted Circuit Terminal

With Bracket:

PW-30 Increased to 40 watts

PW-40 Increased to 50 watts

PW-50 Increased to 60 watts

PW-15E

0.500±0.030

0.020

0.250 min.

Temperature Rise

300

T

e

m

p

e

r

a

t

u

r

e

R

i

s

e

(

°

C

)

250

200

PW-20E

150

100

50

0

Percent of Rated Load

125

PW-30

0.500±0.030

2.000±0.040

PW-50E

1.410±0.040

0.060 Dia. (2)

0.187±0.010

PW-40

1.050 Min.

0.840±0.040

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.

A subsidiary of

TTelectronics plc

Issue B · 03.02

© Welwyn Components Limited

· Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

113

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Welwyn Components

PW-30E

0.250±0.020

Meniscus allowable to

the termination edge

0.205±0.020

1.106±0.050

0.900±0.050

0.375±0.040

0.062 Rad. (2)

0.125 Rad. (Ref.)

0.155±0.005

0.500±0.030

0.709±0.030

0.273±0.010 Dia.

0.290±0.030

0.685±0.060

1.000±0.040

3.000±0.040

2.375±0.040

0.313±0.050

0.020

0.187±0.020

0.020

0.500±0.040

0.900

±0.050

0.060 Dia. (2)

See Meniscus Note

Packaging

Resistors are supplied bulk packed. Quantity 500.

© Welwyn Components Limited

Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

114

Issue B · 03.02

2024年6月6日发(作者：凤淼淼)

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Welwyn Components

•2 watts to 25 watts

•

0.10 ohms to 30K ohms

•

±10% or ±5% tolerance

•

TC’s from 300 ppm/°C to +5500 ppm/°C

Electrical Data

PW-2

Power rating at 25°C

Resistance range

over R range

watts

ohms

0.03%/°C

+0.55%/°C

+0.45%/°C

+0.25%/°C

2

0R15 to 2K4

0.15 to 0.99

1.0 to 2.4K

0.1 to 30

0.24 to 130

1.0 to 10

PW-3

3

0R1 to 7K5

0.1 to 0.99

1.0 to 7.5K

0.1 to 86

0.1 to 270

0.24 to 20

PW-5

5

0R1 to 8K5

0.1 to 0.99

1.0 to 8.5K

0.1 to 68

0.1 to 300

0.27 to 22

PW-7

7

0R1 to 18K

0.1 to 0.99

1.0 to 18K

0.1 to 150

0.15 to 680

1.0 to 51

PW-10

10

0R18 to 30K

0.18 to 0.99

1.0 to 30K

0.1 to 240

1.0 to 82

PW-15

15

0R18 to 30K

0.18 to 0.99

1.0 to 30K

0.1 to 240

1.0 to 82

PW-18

18

0R18 to 22K

0.18 to 0.99

1.0 to 22K

0.1 to 200

1.0 to 70

PW-22

22

0R27 to 18K

0.27 to 1.3

1.5 to 12K

0.15 to 360

1.0 to 120

PW-25

25

0R27 to 18K

0.27 to 1.3

1.5 to 10K

0.15 to 300

1.5 to 100

Temperature coefficient0.06%/°C

0.24 to 11000.24 to 11000.24 to 11000.36 to 18000.36 to 1200

Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)

Physical Data

Dimensions (mm)

L ±0.8

PW-2

PW-3

PW-5

PW-7

PW-10

PW-15

PW-18

PW-22

PW-25

17.5

22.4

22.4

35.3

47.8

47.8

47.8

63.5

63.5

W ±0.8

6.35

7.87

9.65

9.65

9.65

12.7

12.7

12.7

12.7

H ±0.8

6.35

7.87

8.64

8.64

8.64

12.7

12.7

12.7

12.7

d dia.

0.8

0.91

0.91

0.91

0.91

0.91

0.91

1.0*

1.0*

E ±0.8

7.87

9.65

10.4

11.9

11.9

16.0

16.0

16.0

16.0

LL min.

36.6

36.6

38.1

38.1

38.1

38.1

38.1

38.1

38.1

F (ref.)

1.60

1.60

1.60

3.18

3.18

3.18

3.18

3.18

3.18

* Copper Clad Steel

Standard Configuration

d

LLL

0.125 max.

Alternate Configuration

W

H

F

E

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.

A subsidiary of

TTelectronics plc

Issue B · 03.02

© Welwyn Components Limited

· Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

111

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Power Derating

100

P

e

r

c

e

n

t

o

f

R

a

t

e

d

L

o

a

d

80

PW-3, 5, 7, 10

60

PW-15, 18, 22, 25

40

20

0

254085

300

PW-2

T

e

m

p

e

r

a

t

u

r

e

R

i

s

e

(

°

C

)

250

200

150

100

50

0

120

Percent of Rated Load

PW-22, 25

PW-15, 18

PW-10

PW-7

PW-5

PW-3

Welwyn Components

Temperature Rise

Ambient Temperature (°C)

250

Packaging

Resistors are supplied bulk packed. Quantity 500.

© Welwyn Components Limited

Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

112

Issue B · 03.02

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Welwyn Components

•20 watts to 50 watts

•

0.10 ohms to 2.0K ohms

•

±10% or ±5% tolerance

•

Customs

Electrical Data

PW-20E

Power rating at 25°C

Resistance range

watts

ohms

20

0R1 to 2K

PW-30

30

0R5 to 1K2

PW-40

40

0R65 to 1K5

PW-50E

50

0R08 to 1K8

Please note: When ordering the alternative configuration please add an ‘A’ after the part number. (i.e., PW-2A)

Dimensions (Inches)

A ±0.030

PW-20E1.875

PW-302.00

PW-402.45

PW-50E3.075

PW-20E Wirewound

B ±0.060

2.50

2.55

3.00

3.625

0.250 (Typ.)

5/32 Dia. Thru (2)

0.157±0.020

0.032±0.0025

PW-30, 40 and 50E Wirewound

5/32 Dia. Thru (2)

A

0.282±0.020

0.75±0.030

A

0.032±0.0025

0.25

B

0.375

0.75

Power Derating

100

80

60

40

20

0

P

e

r

c

e

n

t

o

f

R

a

t

e

d

L

o

a

d

PW-20E, PW-30, PW-40

PW-50E without bracket

0.5±0.030

0.5±0.030

0.75±0.030

0.875

0.205 or 0.187±0.005

0.069±0.005

0.25±0.031

0.125±0.015

0.200 (Typ.)

0.135±0.015

Ambient Temperature (°C)

250

PW-20E Alternate Terminal ConfigurationPrinted Circuit Terminal

With Bracket:

PW-30 Increased to 40 watts

PW-40 Increased to 50 watts

PW-50 Increased to 60 watts

PW-15E

0.500±0.030

0.020

0.250 min.

Temperature Rise

300

T

e

m

p

e

r

a

t

u

r

e

R

i

s

e

(

°

C

)

250

200

PW-20E

150

100

50

0

Percent of Rated Load

125

PW-30

0.500±0.030

2.000±0.040

PW-50E

1.410±0.040

0.060 Dia. (2)

0.187±0.010

PW-40

1.050 Min.

0.840±0.040

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.

A subsidiary of

TTelectronics plc

Issue B · 03.02

© Welwyn Components Limited

· Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

113

元器件交易网

General Purpose Power

Wirewound Resistors

PW Series

Welwyn Components

PW-30E

0.250±0.020

Meniscus allowable to

the termination edge

0.205±0.020

1.106±0.050

0.900±0.050

0.375±0.040

0.062 Rad. (2)

0.125 Rad. (Ref.)

0.155±0.005

0.500±0.030

0.709±0.030

0.273±0.010 Dia.

0.290±0.030

0.685±0.060

1.000±0.040

3.000±0.040

2.375±0.040

0.313±0.050

0.020

0.187±0.020

0.020

0.500±0.040

0.900

±0.050

0.060 Dia. (2)

See Meniscus Note

Packaging

Resistors are supplied bulk packed. Quantity 500.

© Welwyn Components Limited

Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@ · Website:

114

Issue B · 03.02