ꢀ=ꢀStandardꢀvalues;ꢀ
250 Series
‘Thin’ Stackohm®
Vitreous Enamel Power
cOꢀꢁ aNd tꢁꢀmꢂNal SꢁlꢁctꢂON
ForꢀMadeꢀtoꢀOrderꢀTypeꢀ250ꢀStackohmꢀResistors
Code
for
Free Air
Max.
†
Core Dimensions
Wattage
Min. Practical Core
Fig.
No.
Standard
Terminal
Rating*
Length L
Width W
Thickness T
Ohms Ohms
Dia.
Dimension A
Dimension B
Miniature
ꢀ
ꢀ
ꢀ
ꢀ
10ꢀ
15ꢀ
20ꢀ
12ꢀ
0.750”ꢀ(19.050mm)ꢀ
1.000”ꢀ(25.400mm)ꢀ
2.000”ꢀ(50.800mm)ꢀ
0.688”ꢀ(17.463mm)ꢀ
0.375”ꢀ(9.525mm)ꢀ
0.375”ꢀ(9.525mm)ꢀ
0.375”ꢀ(9.525mm)ꢀ
0.594”ꢀ(15.081mm)ꢀ
0.125”ꢀ(3.175mm)ꢀ
0.125”ꢀ(3.175mm)ꢀ
0.125”ꢀ(3.175mm)ꢀ
0.234”ꢀ(5.953mm)ꢀ
1ꢀ
1ꢀ
1ꢀ
1ꢀ
15,000ꢀ
25,000ꢀ
50,000ꢀ
20,000ꢀ
TAꢀ
TAꢀ
TAꢀ
TBꢀ
1ꢀ
1ꢀ
1.000”ꢀ(25.400mm)ꢀ
1.250”ꢀ(31.750mm)ꢀ
2.313”ꢀ(58.750mm)ꢀ
ꢀ
0.375”ꢀ(9.525mm)ꢀ
0.375”ꢀ(9.525mm)ꢀ
0.375”ꢀ(9.525mm)ꢀ
ꢀ
51
51
51
51
1ꢀ
**ꢀ
Intermediate
ꢀ
ꢀ
21ꢀ
25ꢀ
1.000”ꢀ(25.400mm)ꢀ
1.500”ꢀ(38.100mm)ꢀ
0.813”ꢀ(20.638mm)ꢀ
0.813”ꢀ(20.638mm)ꢀ
0.250”ꢀ(6.350mm)ꢀ
0.250”ꢀ(6.350mm)ꢀ
1ꢀ
1ꢀ
8,000ꢀ
TDꢀ
TDꢀ
2ꢀ
2ꢀ
1.313”ꢀ(33.350mm)ꢀ
1.813”ꢀ(46.050mm)ꢀ
0.594”ꢀ(15.081mm)ꢀ
0.594”ꢀ(15.081mm)ꢀ
51
51
15,000ꢀ
Standard
ꢀ
ꢀ
ꢀ
TE
ꢀ
5ꢀ
3,ꢀ4ꢀ
1.750”ꢀ(44.450mm)ꢀ
2.000”ꢀ(50.800mm)ꢀ
30ꢀ
1.250”ꢀ(31.750mm)ꢀ
ꢀ
1.000”ꢀ(25.400mm)ꢀ
ꢀ
0.250”ꢀ(6.350mm)ꢀ
ꢀ
1ꢀ
ꢀ
10,000ꢀ
ꢀ
0.938”ꢀ(23.813mm)ꢀ
ꢀ
57ꢀ
ꢀ
ꢀ
TE
ꢀ
5ꢀ
3,ꢀ4ꢀ
2.500”ꢀ(63.500mm)ꢀ
2.750”ꢀ(69.850mm)ꢀ
ꢀ
ꢀ
ꢀ
40ꢀ
ꢀ
2.000”ꢀ(50.800mm)ꢀ
ꢀ
1.000”ꢀ(25.400mm)ꢀ
ꢀ
0.250”ꢀ(6.350mm)ꢀ
ꢀ
1ꢀ
ꢀ
25,000ꢀ
ꢀ
0.938”ꢀ(23.813mm)ꢀ
ꢀ
57
ꢀ
TE
ꢀ
5ꢀ
3,ꢀ4ꢀ
4.000”ꢀ(1.1.600mm)
ꢀ
55ꢀ
ꢀ
3.500”ꢀ(88.900mm)ꢀ
ꢀ
1.000”ꢀ(25.400mm)ꢀ
ꢀ
0.250”ꢀ(6.350mm)ꢀ
ꢀ
1ꢀ
ꢀ
30,000ꢀ
ꢀ
0.938”ꢀ(23.813mm)ꢀ
ꢀ
57ꢀ
ꢀ
ꢀ
4.250”ꢀ(107.950mm)ꢀ
ꢀ
TE
ꢀ
5ꢀ
3,ꢀ4ꢀ
5.250”ꢀ(133.350mm)
ꢀ
‡
ꢀ
ꢀ
ꢀ
70ꢀ
ꢀ
4.750”ꢀ(120.650mm)ꢀ 1.000”ꢀ(25.400mm)ꢀ
0.250”ꢀ(6.350mm)ꢀ
ꢀ
1ꢀ
ꢀ
120,000 ꢀ
ꢀ
0.938”ꢀ(23.813mm)ꢀ
ꢀ
57
ꢀ
ꢀ
5.500”ꢀ(139.700mm)ꢀ
ꢀ
TE
ꢀ
5ꢀ
3,ꢀ4ꢀ
6.500”ꢀ(165.100mm)ꢀ
6.750”ꢀ(171,450mm)
‡
150,000 ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
57
95ꢀ
ꢀ
6.000”ꢀ(152.400mm)ꢀ 1.000”ꢀ(25.400mm)ꢀ
0.250”ꢀ(6.350mm)ꢀ
ꢀ
1ꢀ
ꢀ
0.938”ꢀ(23.813mm)ꢀ
ꢀ
ꢀ
‡
*Basedꢀonꢀmountingꢀonꢀsteeelꢀpanelꢀ10”ꢀ(254mm)ꢀꢀxꢀ10”ꢀxꢀ0.040”ꢀ(1.016mm).
TheseꢀsizesꢀareꢀOhmiconeꢀ(silicone-ceramic)ꢀcoated–typeꢀ450-460.
**Userꢀsuppliesꢀbrackets.
†
Insideꢀdimensionsꢀofꢀcoreꢀare:ꢀ0.250”ꢀ(6.350mm)ꢀxꢀ0.047”ꢀ(1.191mm)ꢀforꢀTA;ꢀ0.406”ꢀ
(10.319mm)ꢀxꢀ0.047”ꢀ(1.191mm)ꢀforꢀTB;ꢀ0.438”ꢀ(11.113mm)ꢀxꢀ0.063”ꢀ(1.588mm)ꢀforꢀTD;ꢀ
0.672”ꢀ(17.069mm)ꢀxꢀ0.063”ꢀ(1.588mm)ꢀforꢀTE.
OꢀdꢁꢀꢂNg ꢂNFOꢀmatꢂON
Series
RoHS Compliant
Made-to-order Parts
Terminal Type
See “Resistor Terminals for Tubular Cores”
Tolerance RoHS
J = 5% Compliant
See web-
site for
custom
core info
Coating
Wattage Tolerance Ohms
Blank = Vitreous
C = Centohm
S = Silicone
F = 1%
H = 3%
J = 5%
1R0 = 1Ω
250 = 250Ω
1K0 = 1,000Ω
K = 10% 25K = 25,000Ω
Series
Wattage &
Core Code
See “Core and
Mounting Brackets
Ohms
25K5 = 25,500Ω
Vitreous enamel:
25 = 250 Fixed
(user supplies bracket for core TB) Example:
B = Stacking box
1R00 = 1Ω
26 = 260 Adjustable Terminal Selection” S = Stacking stud, std. height
250R = 250Ω
1K00 = 1,000Ω
25K0 = 25,000Ω
25K5 = 25,500Ω
H = Stacking stud high
Silicone ceramic:
U = Unit type
45 = 450 Fixed
46 = 460 Adjustable
Standard Values
Wattage
Wattage
Wattage
Part No.
Prefixꢀ
Suffixꢀ
Part No.
Prefixꢀ
Suffixꢀ
Part No.
Prefixꢀ
Suffixꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
1ꢀ –––1R0Eꢀ ꢀ ꢀ ꢀ ꢀ
1.5ꢀ–––1R5Eꢀ ꢀ ꢀ
2ꢀ –––2R0Eꢀ ꢀ ꢀ ꢀ ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
50ꢀ –––50REꢀ ꢀ
75ꢀ –––75REꢀ
100ꢀ –––100Eꢀ ꢀ ꢀ ꢀ ꢀ
ꢀ
ꢀ ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
1,500ꢀ –––1K5Eꢀ ꢀ ꢀ ꢀ
2,000ꢀ –––2K0Eꢀ ꢀ
2,500ꢀ –––2K5Eꢀ ꢀ ꢀ ꢀ ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
checkꢀavailabilityꢀatꢀ
www.ohmite.com
3ꢀ –––3R0Eꢀ
4ꢀ –––4R0Eꢀ
ꢀ
ꢀ
ꢀ
ꢀ ꢀ
150ꢀ –––150Eꢀ
ꢀ
ꢀ
ꢀ
ꢀ
3,000ꢀ –––3K0Eꢀ ꢀ
ꢀ
ꢀ ꢀ
ꢀ
ꢀ
ꢀ
200ꢀ –––200Eꢀ ꢀ
ꢀ
ꢀ ꢀ
4,000ꢀ –––4K0Eꢀ
5,000ꢀ –––5K0Eꢀ
6,000ꢀ –––6K0Eꢀ
7,500ꢀ –––7K5Eꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
5ꢀ –––5R0Eꢀ ꢀ ꢀ ꢀ ꢀ
250ꢀ –––250Eꢀ
300ꢀ –––300Eꢀ
400ꢀ –––400Eꢀ ꢀ
ꢀ
ꢀ
ꢀ ꢀ ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
7.5ꢀ–––7R5Eꢀ ꢀ
10ꢀ –––10REꢀ ꢀ ꢀ
15ꢀ –––15REꢀ ꢀ ꢀ ꢀ
20ꢀ –––20REꢀ ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
500ꢀ –––500Eꢀ ꢀ ꢀ ꢀ ꢀ
ꢀ10,000ꢀ –––10KEꢀ
ꢀ15,000ꢀ –––15KEꢀ
ꢀ20,000ꢀ –––20KEꢀ
ꢀ25,000ꢀ –––25KEꢀ
ꢀ40,000ꢀ –––40KEꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
750ꢀ –––750Eꢀ
ꢀ
ꢀ
ꢀ ꢀ
ꢀ
ꢀ
ꢀ
25ꢀ –––25REꢀ ꢀ ꢀ ꢀ ꢀ
800ꢀ –––800Eꢀ
ꢀ
ꢀ
ꢀ
ꢀ
30ꢀ –––30REꢀ ꢀ
40ꢀ –––40REꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
1,000ꢀ –––1K0Eꢀ ꢀ ꢀ ꢀ ꢀ
1,250ꢀ –––1K25Eꢀ ꢀ ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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