Ohmic Values

The range of Ohmic Values is shown below. You may select any Ohmic Value between the Max and Min values.

 

Low Inductance Windings

Ayrton Perry windings are available for resistors which are required to be substantially non-inductive.

 

Thermal cut-outs

Cut-outs can be fitted to certain resistors which will operate a contact to disconnect the resistor to prevent overload damage.

 

Electrical Data Power Rating - Continuous Duty

The two power ratings given to each type of resistor in the table are based on temperature rises of 280 C and 380 C respectively and relate to single resistors mounted in free air.

*380 C applies only to vitreous resistors.

Where it is desirable to limit the surface temperature of the resistor, refer to the graph shown below.

 

 Standard Ohmic Values & Tolerances - other Values & Tolerances available on request

WATTS

TYPE

RANGE

30

40 45 60 90

130

OHMIC

150

VALUE

180 220 320 380

TOLERANCE

PE

FIXED WIRE

MIN

MAX

2R2

5K0

4R7

10K

4R7

10K

4R7

15K

10R

30K

10R

60K

12R

70K

22R

100K

22R

120K

33R

120K

47R

125K

> 10R +/- 5%

≤ 10R +/- 10%

PT

FIXED TAPE

MIN

MAX

0R02

2R0

0R15

4R5

0R2

4R5

0R2

4R5

0R3

9R0

0R7

9R0

0R8

10R

1R0

20R

1R0

20R

1R5

30R

1R5

30R

+/- 10%

NI NON

INDUCTIVE

MIN

MAX

1R0

500R

2R0

500R

2R0

500R

3R0

500R

3R0

1K0

5R0

1K5

6R0

1K5

7R0

1K5

10R

1K5

25R

2K0

30R

2K5

+/- 10%

ADJ

ADJUSTABLE

MIN

MAX

2R2

1K3

2R2

3K9

4R7

2K2

4R7

3K9

8R2

6K2

15R

11K

16R

13K

20R

16K

27R

22K

36R

22K

43R

22K

+/- 10%

 
   
 

Ratings

De-Rating Continuous Rating

Where it is desirable to limit the surface temperature of the resistor, refer to this graph.

 
   
 Short Time Ratings for Vitreous Enamelled Resistors

TYPE

SIZE

(cm)

WINDING

SPACES

(cm)

CONT.

RATING

(W) 280C

10 SECOND

RATING

(W)

5 SECOND

RATING

(W)

1 SECOND

RATING

(W)

0.5 SECOND

RATING

(W)

VOLTS

MAX

(Vm)

PE30

5.1 x 1.9

2.6

30 200 400 600 1300 360

PE40

10.2 x 1.9

7.7

40 300 600 900 1800 1080

PE45

5.1 x 3.2

2.6

45 400 800 1300 2600 360

PE60S

7.0 x 3.2

4.5

60 600 1200 1900 3800 630

PE60L

8.9 x 2.2

6.4

60 600 1200 1900 3800 890

PE90S

10.2 x 3.2

6.2

90 800 1600 2600 5200 860

PE90L

16.5 x 2.2

14

90 800 1600 2600 5200 1900

PE130

15.2 x 3.2

11.2

130 1000 2000 3300 6600 1500

PE150

17.8 x 3.2

13.8

150 1200 2400 3900 7900 1900

PE180

21.6 x 3.2

17.6

180 1500 3000 4950 9900 2400

PE220

26.7 x 3.2

22.7

220 2200 4400 7260 14500 3100
PE320

26.7 x 4.5

22.7 320 3500 7000 11550 23100 3100
PE380

30.5 x 4.5

26.5 380 6000 12000 19800 39600 3700
PE600

30.5 x 5.4

26.5 600 9400 18800 31000 62000 3700
PE750

35.6 x 5.4

31.6 750 11800 23600 38900 77800 4400
PT750

35.6 x 5.4

31.6 1000 15700 31400 52000 104000 4400
 
   
 

Short Time

In cases where resistors are only required to be operated intermittently, a higher short-time rating may be considered.

The graph shows loading against on time assuming a cooling time of at least 20 minutes between duty cycles.

 
   
 

High Ambient Temperatures

When the ambient temperature is above 20 C, resistors should be de-rated as shown on the graph.

 
   

 Dimensions (mm) - Vitreous Enamelled & Open Wound Resistors

TYPE

WATTS

280C

WATTS

380C

A B C D E F G H HR J K L M N P R

PB & PE30

PT30

30

35

35

44

51 19 9.5 25 6.3 4 72 62 42 16 20 64 38 25 4x6 4x6

PB & PE40

PT40

40

50

65

80

102 19 9.5 25 6.3 4 123 113 93 16 20 114 38 25 4x6 4x6

PB & PE45

PT45

45

55

65

80

51 32 19 37 6.3 4 91 75 30 28 27 64 54 41 5x8 5x13

PB & PE60L

PT60L

60

75

75

90

89 22 12.6 30 6.3 4 117 103 77 20 27 102 45 32 4x6 5x8

PB & PE60S

PT60S

60

75

75

90

70 32 19 37 6.3 4 110 94 48 28 27 83 54 41 5x8 5x13

PB & PE90L

PT90L

90

110

125

185

165 22 12.6 30 6.3 4 193 179 153 20 27 178 45 32 4x6 5x8

PB & PE90S

PT90S

90

110

125

185

102 32 19 37 9.5 6 142 126 80 28 27 114 54 41 5x8 5x13

PB & PE130

PT130

130

160

175

215

152 32 19 37 9.5 6 192 176 130 28 27 165 54 41 5x8 5x13

PB & PE150

PT150

150

185

195

245

178 32 19 37 9.5 6 218 202 156 28 27 191 54 41 5x8 5x13

PB & PE180

PT180

180

220

230

285

216 32 19 37 9.5 6 256 240 194 28 27 229 54 41 5x8 5x13

PB & PE220

PT220

220

275

285

400

267 32 19 37 9.5 6 307 291 245 28 27 279 54 41 5x8 5x13

PB & PE320

PT320

320

400

420

560

267 45 28 43 9.5 6 318 291 248 44 51 - - - - 7x14

PB & PE380

PT380

380

476

500

625

305 45 28 43 9.5 6 356 327 286 44 51 - - - - 7x14
 
   
 Dimensions (mm) - continued

TYPE

WATTS

280C

WATTS

380C

S T U V W

PB & PE20F & WF

PT20F & WF

20

23

30

55

59 48 14 19 4

PB & PE30F & WF

PT30F & WF

30

35

35

44

76 65 14 19 4

PB & PE40F & WF

PT40F & WF

40

50

65

80

127 116 14 19 4

PB & PE45F & WF

PT45F & WF

45

55

65

80

83 70 27 32 6

PB & PE60LF & WF

PT60LF & WF

60

75

75

90

121 108 21 22 5

PB & PE60SF & WF

PT60SF & WF

60

75

75

90

102 90 27 32 6

PB & PE90LF & WF

PT90LF & WF

90

110

150

185

197 184 21 22 5

PB & PE90F & WF

PT90F & WF

90

110

125

185

133 121 27 32 6

PB & PE130F & WF

PT130F & WF

130

160

175

215

184 171 27 32 6

PB & PE180F & WF

PT180F & WF

180

220

230

285

248 235 27 32 6

PB & PE220F & WF

PT220F & WF

220

275

285

400

298 286 27 32 6
 

Notes

PE = Vitreous Enamelled Resistors

PT = Tape Wound Resistors

PB = Open Wire Wound Resistors

 

PT Resistors

Dimension 'B' may vary up to 10mm greater depending on the resistance value specified.

 
   
   
   
 

Suffixes

H:

Horizontal Mounting

HR:

Horizontal Mounting (Reverse)

V:

Vertical Mounting

F:

Dead Ferrule Ends

WF:

Live Ferrule Ends
 
   
 
 
                 

Copyright HVR Pentagon Ltd 2014. All Rights Reserved. This page last updated: 6 March, 2014.