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Fabricante

F20

‘Thin’ Stackohm® Vitreous Enamel Power

Ohmite Mfg. Co. 

250 Series

‘Thin’ Stackohm®

Vitreous Enamel Power

Co r e a n d T e r m i n a l S e l e c t i on

For Made to Order Type 250 Stackohm Resistors

Code

Free Air

Wattage

Core Dimensions†

Max.

for

Min. Practical Core Fig.

Rating*

Length L

Width W

Thickness T Ohms Ohms Dia. No.

Dimension A

Miniature

10 0.750” (19.050mm)

15 1.000” (25.400mm)

20 2.000” (50.800mm)

12 0.688” (17.463mm)

Intermediate

21 1.000” (25.400mm)

25 1.500” (38.100mm)

Standard

30 1.250” (31.750mm)

0.375” (9.525mm)

0.375” (9.525mm)

0.375” (9.525mm)

0.594” (15.081mm)

0.813” (20.638mm)

0.813” (20.638mm)

1.000” (25.400mm)

0.125” (3.175mm)

0.125” (3.175mm)

0.125” (3.175mm)

0.234” (5.953mm)

0.250” (6.350mm)

0.250” (6.350mm)

0.250” (6.350mm)

40 2.000” (50.800mm) 1.000” (25.400mm) 0.250” (6.350mm)

55 3.500” (88.900mm) 1.000” (25.400mm) 0.250” (6.350mm)

70 4.750” (120.650mm) 1.000” (25.400mm) 0.250” (6.350mm)

95 6.000” (152.400mm) 1.000” (25.400mm) 0.250” (6.350mm)

1 15,000 TA

1

1 25,000 TA

1

1 50,000 TA

1

1 20,000 TB

**

1

8,000 TD

2

1 15,000 TD

2

1

10,000

TE

5

3, 4

1

25,000

TE

5

3, 4

1

30,000

TE

5

3, 4

1 120,000‡ TE

5

3, 4

1 150,000‡ TE

5

3, 4

1.000” (25.400mm)

1.250” (31.750mm)

2.313” (58.750mm)

1.313” (33.350mm)

1.813” (46.050mm)

1.750” (44.450mm)

2.000” (50.800mm)

2.500” (63.500mm)

2.750” (69.850mm)

4.000” (1.1.600mm)

4.250” (107.950mm)

5.250” (133.350mm)

5.500” (139.700mm)

6.500” (165.100mm)

6.750” (171,450mm)

Standard

Dimension B Terminal

0.375” (9.525mm)

51

0.375” (9.525mm)

51

0.375” (9.525mm)

51

51

0.594” (15.081mm)

51

0.594” (15.081mm)

51

0.938” (23.813mm) 57

0.938” (23.813mm) 57

0.938” (23.813mm) 57

0.938” (23.813mm)

57

0.938” (23.813mm)

57

*Based on mounting on steeel panel 10” (254mm) x 10” x 0.040” (1.016mm).

†Inside dimensions of core are: 0.250” (6.350mm) x 0.047” (1.191mm) for TA; 0.406”

(10.319mm) x 0.047” (1.191mm) for TB; 0.438” (11.113mm) x 0.063” (1.588mm) for TD;

0.672” (17.069mm) x 0.063” (1.588mm) for TE.

‡These sizes are Ohmicone (silicone-ceramic) coated–type 450-460.

**User supplies brackets.

o r d e r i n g i nfo r m a t i on

Series

RoHS Compliant Made-to-order Parts

Coating Wattage

Blank = Vitreous

C = Centohm

S = Silicone

Tolerance

F = 1%

H = 3%

J = 5%

K = 10%

Ohms

1R0 = 1Ω

250 = 250Ω

1K0 = 1,000Ω

25K = 25,000Ω

25K5 = 25,500Ω

Standard Values

Wattage

See web-

site for

custom

core info

Terminal Type

See “Resistor Terminals for Tubular Cores”

Tolerance RoHS

J = 5% Compliant

Series

Wattage &

Mounting Brackets

Ohms

Vitreous enamel: Core Code

(user supplies bracket for core TB) Example:

25 = 250 Fixed

See “Core and

B = Stacking box

1R00 = 1Ω

26 = 260 Adjustable Terminal Selection” S = Stacking stud, std. height

250R = 250Ω

Silicone ceramic:

45 = 450 Fixed

46 = 460 Adjustable

H = Stacking stud high

U = Unit type

1K00 = 1,000Ω

25K0 = 25,000Ω

25K5 = 25,500Ω

Wattage

Wattage

Part No.

Prefix 

Suffix

1 –––1R0E     

1.5 –––1R5E



2 –––2R0E     

3 –––3R0E



4 –––4R0E



5 –––5R0E     

7.5 –––7R5E 



10 –––10RE  



15 –––15RE   

20 –––20RE 

25 –––25RE     

30 –––30RE 

40 –––40RE



Part No.

Prefix 

Suffix

50 –––50RE 



75 –––75RE





100 –––100E     

150 –––150E



200 –––200E 



250 –––250E



300 –––300E



400 –––400E 



500 –––500E     

750 –––750E



800 –––800E



1,000 –––1K0E     

1,250 –––1K25E  

Part No.

Prefix 

Suffix

1,500 –––1K5E   



2,000 –––2K0E





2,500 –––2K5E     

3,000 –––3K0E 



4,000 –––4K0E





5,000 –––5K0E



6,000 –––6K0E

7,500 –––7K5E



10,000 –––10KE



15,000 –––15KE



20,000 –––20KE



25,000 –––25KE



40,000 –––40KE



112

1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com

 = Standard values;

check availability at

www.ohmite.com

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