High Energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
Ohmite Manufacturing’s family of High Energy
Wirewound Resistors employ special winding techniques to maximize the effective joule rating of each
resistor. Most wirewound resistors are wound with
the objective of meeting the stated power (wattage) rating and keeping cost low through the use
of automatic winding equipment. Typically, manufacturers will allow substitution of resistance wire,
depending on material availability. On tight tolerance
wirewounds some type of abrasive adjustment to the
resistance wire is often used to maximize production
yields. Both of these procedures can adversely affect
the joule rating and fusing current of a wirewound
resistor, and this is often the reason that the manufacturer does not publish a fixed joule rating.
Ohmite High Energy Wirewounds are hand wound
in order to maintain the tightest possible pitch
(space between windings) and thereby maximize the
mass of the resistive element. Since no wire substitutions are allowed, and no abrasive adjusting is
permitted in this family, Ohmite can publish a fixed
joule rating and fusing current for each part number
in the series.
This technique can be applied to any wirewound
product. In order to provide the broadest selection of
packaging, Ohmite has developed standard offerings
in three different package types-axial, SMD, and heat
sinkable. Other sizes and types can be quoted on
request, such as tubular power resistors.
SE R IES S P E C I F I C A T IONS
Series
33Jxxx
35Jxxx
30Jxxx
825JxxxH
RH3R0DBxxxJ
Type
Axial
Axial
Axial
Heat Sinkable
Surface Mount
Watts
3
5
10
25
3
Tolerance
5%
5%
5%
5%
5%
Voltage
200
460
1000
520
200
Dimensions
1.5 / 38.1
33J: 0.593 / 15.1
35J: 1.000 / 25.4
30J: 1.900 / 46.8
825JxxxH: 1.938 / 49.23
33J: 0.218 / 5.5
35J: 0.343 / 8.7
30J: 0.406 / 10.3
33J: 20 ga.
35J: 18 ga.
30J: 18 ga.
0.273 / 6.934
0.226 / 5.740
RH3R0DBxxxJ: 0.612 / 15.545
60
0.546 / 13.87
1.080 / 27.43
in. / mm
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
33
J1
33 R0
J5
33 R0
J1
33 0R
J1
33 5R
J2
33 0R
J2
33 5R
J3
33 0R
J5
33 0R
J1
35 00
J1
35 R5
J2
35 R5
J7
35 R5
J1
35 2R
J1
35 8R
J2
35 2R
J3
35 6R
J4
35 7R
J7
30 5R
J2
30 R0
J4
30 R7
J6
30 R8
J1
30 5R
J2
30 7R
J3
30 3R
J5
30 0R
J8
30 2R
J1
30 00
J1
50
100
80
60
40
20
0
50
Fusing Energy (J)
600
500
200
100
0
Fusing Current (A)
40
30
20
825J-
250
825J-
45
825J-
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
-R
50
-1R 0J
0
-2R 0J
7
-4R 0J
7
-6R 0J
8
-7R 0J
5
-10 0J
R
-15 0J
R
-25 0J
R
-47 0J
R
-68 0J
R
-75 0J
R0
J
120
-R
50
-1R 0J
0
-2R 0J
7
-4R 0J
7
-6R 0J
8
-7R 0J
5
-10 0J
R
-15 0J
R
-25 0J
R
-47 0J
R
-68 0J
R
-75 0J
R0
J
140
-1R
0
-5R H
0
-10 H
R
-25 H
R
-36 H
R
-47 H
R
-75 H
R
-10 H
0
-15 H
0H
160
60
-R
50
-1R 0J
0
-2R 0J
7
-4R 0J
7
-6R 0J
8
-7R 0J
5
-10 0J
R
-15 0J
R
-25 0J
R
-47 0J
R
-68 0J
R
-75 0J
R0
J
700
Energy (J)
-1R
0
-5R H
0
-10 H
R
-25 H
R
-36 H
R
-47 H
R
-75 H
R
-10 H
0
-15 H
0H
33
J1
33 R0
J5
33 R0
J1
33 0R
J1
33 5R
J2
33 0R
J2
33 5R
J3
33 0R
J5
33 0R
J1
35 00
J1
35 R5
J2
35 R5
J7
35 R5
J1
35 2R
J1
35 8R
J2
35 2R
J3
35 6R
J4
35 7R
J7
30 5R
J2
30 R0
J4
30 R7
J6
30 R8
J1
30 5R
J2
30 7R
J3
30 3R
J5
30 0R
J8
30 2R
J1
30 00
J1
50
180
-1R
0
-5R H
0
-10 H
R
-25 H
R
-36 H
R
-47 H
R
-75 H
R
-10 H
0
-15 H
0H
33
J1
33 R0
J5
33 R0
J1
33 0R
J1
33 5R
J2
33 0R
J2
33 5R
J3
33 0R
J5
33 0R
J1
35 00
J1
35 R5
J2
35 R5
J7
35 R5
J1
35 2R
J1
35 8R
J2
35 2R
J3
35 6R
J4
35 7R
J7
30 5R
J2
30 R0
J4
30 R7
J6
30 R8
J1
30 5R
J2
30 7R
J3
30 3R
J5
30 0R
J8
30 2R
J1
30 00
J1
50
High Energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
p e rf o r m a n c e charact e r i s i c s
Energy (J)
14
50
40
30
20
10
2
0
0
Fusing Energy (J)
60
200
400
150
30
300
100
20
50
0
Fusing Current (A)
35
40
35
30
15
25
20
20
15
10
10
5
5
0
0
0
61
Energy (J)
12
10
8
6
4
RH3R0DB-
Fusing Energy (J)
50
40
10
0
0
RH3R0DB-
Fusing Current (A)
30
25
10
RH3R0DB-
(continued)
High Energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
o rd e r i n g i n f o r m at i o n
Standard Part Numbers
Part Number
Ohms Power
Energy
Fusing Current (J)
Energy (J) to fuse (A)
Power to
fuse (W)
33J1R0
33J5R0
33J10R
33J15R
33J20R
1
5
10
15
20
3
3
3
3
3
12.70
6.25
4.94
4.66
3.91
53.26
26.20
20.73
19.55
16.40
23.93
10.03
7.08
5.95
5.00
572.60
502.96
501.70
531.47
500.45
33J25R
33J30R
33J50R
33J100
35J1R5
25
30
50
100
1.5
3
3
3
3
5
3.07
2.97
2.43
1.92
76.55
12.89
12.46
10.20
8.07
321.19
4.20
3.92
2.97
2.10
40.32
441.79
460.80
440.68
439.58
2438.48
35J2R5
35J7R5
35J12R
35J18R
35J22R
2.5
7.5
12
18
22
5
5
5
5
5
64.65
37.66
37.90
28.80
27.48
271.23
158.01
158.99
120.84
115.29
31.59
16.90
14.20
11.13
10.03
2494.75
2141.89
2420.25
2228.50
2213.02
35J36R
35J47R
35J75R
30J2R0
30J4R7
36
47
75
2
4.7
5
5
5
10
10
22.78
23.22
18.77
162.30
150.86
95.59
97.42
78.77
680.93
632.92
7.86
7.08
5.55
47.98
33.88
2222.93
2358.00
2309.77
4603.79
5395.94
30J6R8
30J15R
30J27R
30J33R
30J50R
6.8
15
27
33
50
10
10
10
10
10
137.27
119.76
85.27
65.54
62.45
575.91
502.47
357.74
274.98
262.03
28.47
20.11
14.20
11.93
10.03
5513.41
6065.77
5445.56
4700.40
5029.59
30J82R
30J100
30J150
825J1R0H
825J5R0H
82
100
150
1
5
10
10
10
25
25
51.90
49.41
46.61
51.04
39.92
217.74
207.28
195.54
214.12
167.49
7.86
7.08
5.95
40.32
20.11
5063.34
5017.03
5314.71
1625.65
2021.92
825J10RH
825J25RH
825J36RH
825J47RH
825J75RH
10
25
36
47
75
25
25
25
25
25
31.58
19.64
17.79
18.71
14.66
132.50
82.40
74.62
78.49
61.49
14.20
8.43
7.08
6.60
5.00
2016.87
1776.01
1806.13
2049.57
1876.69
25
25
3
3
3
12.29
11.59
12.93
10.23
6.87
51.56
48.64
54.25
42.91
28.82
4.20
3.53
31.59
22.31
13.24
1767.15
1872.00
498.95
497.70
473.33
825J100H
100
825J150H
150
RH3R0DBR500J
0.5
RH3R0DB1R00J
1
RH3R0DB2R70J
2.7
RH3R0DB4R70J
RH3R0DB6R80J
RH3R0DB7R50J
RH3R0DB10R0J
RH3R0DB15R0J
4.7
6.8
7.5
10
15
3
3
3
3
3
5.87
5.34
4.75
3.98
3.75
24.63
22.41
19.91
16.70
15.75
10.03
8.43
7.86
6.60
5.55
472.78
483.07
463.11
436.08
461.95
RH3R0DB25R0J
RH3R0DB47R0J
RH3R0DB68R0J
RH3R0DB75R0J
25
47
68
75
3
3
3
3
3.07
2.28
2.08
2.29
12.89
9.59
8.72
9.62
4.20
2.97
2.49
2.49
441.79
414.24
423.26
466.83
RoHS compliant product available; Add “E” suffix to part number to specify.
Other values available, contact Ohmite for details.
62
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com