High energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
Ohmite Manufacturings family of High Energy
Wirewound Resistors employ special winding tech-
niques to maximize the effective joule rating of each
resistor. Most wirewound resistors are wound with
the objective of meeting the stated power (watt-
age) rating and keeping cost low through the use
of automatic winding equipment. Typically, manu-
facturers 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
in this family, Ohmite can publish a fixed joule rat-
the joule rating and fusing current of a wirewound
ing and fusing current for each part number in the
resistor, and this is often the reason that the manu-
series.
facturer does not publish a fixed joule rating.
This technique can be applied to any wirewound
Ohmite High Energy Wirewounds are wound so
product. In order to provide the broadest selection of
as to maintain the tightest possible pitch (space
packaging, Ohmite has developed standard offerings
between windings) and thereby maximize the mass
in three different package types-axial, SMD, and heat
of the resistive element. Since no wire substitutions
sinkable. Other sizes and types can be quoted on
are allowed, and no abrasive adjusting is permitted
request, such as tubular power resistors.
seRies sPeCiFiCATions
Series Type Watts Tolerance Voltage
33Jxxx Axial 3 5% 200
35Jxxx Axial 5 5% 460
30Jxxx Axial 10 5% 1000
825JxxxH Heat Sinkable 25 5% 520
RH3R0DBxxxJ Surface Mount 3 5% 200
Dimensions
33J: 0.593 / 15.1 825JxxxH: 1.938 / 49.23 0.546 / 13.87
in. / mm
35J: 1.000 / 25.4
30J: 1.900 / 46.8
33J: 0.218 / 5.5
35J: 0.343 / 8.7
1.5 / 38.1
30J: 0.406 / 10.3
33J: 20 ga.
35J: 18 ga.
30J: 18 ga.
RH3R0DBxxxJ: 0.612 / 15.545 0.273 / 6.934
1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info@ohmite.com 61
0.226 / 5.740
1.080 / 27.43High energy Wirewound
Axial Terminal / Surface Mount / Heat Sinkable Packaging
PeRFoRmAnCe CHARACTeRisiCs
Energy (J) Energy (J) Energy (J)
180 60 14
160
12
50
140
10
120 40
8
100
30
80
6
60 20
4
40
10
2
20
0 0 0
825J- RH3R0DB-
Fusing Energy (J) Fusing Energy (J) Fusing Energy (J)
700 250 60
600
50
200
500 40
150
400
30
300 20
100
200
10
50
100 0
0 0 0
825J- RH3R0DB-
Fusing Current (A) Fusing Current (A) Fusing Current (A)
50
45 35
40
30
40
35
25
30
30
20
25
20
15
20
15
10
10
10
5
5
0 0 0
825J- RH3R0DB-
(continued)
62 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info@ohmite.com
33J1R0
33J5R0
33J10R
33J15R
33J20R
33J25R
33J30R
33J50R
33J100
35J1R5
33J1R0
35J2R5
33J5R0
35J7R5
33J10R
35J12R
33J15R
35J18R
33J20R
35J22R
33J25R
35J36R
33J30R
35J47R
33J50R
35J75R
33J100
30J2R0
35J1R5
33J1R0
30J4R7
35J2R5
33J5R0
30J6R8
35J7R5
33J10R
30J15R
35J12R
33J15R
30J27R
35J18R
33J20R
30J33R
35J22R
33J25R
30J50R
35J36R
33J30R
30J82R
35J47R
33J50R
30J100
35J75R
33J100
30J150
30J2R0
35J1R5
30J4R7
35J2R5
30J6R8
35J7R5
30J15R
35J12R
30J27R
-1R0H
35J18R
30J33R
-5R0H
35J22R
30J50R
-10RH
35J36R
30J82R
-25RH
35J47R
30J100
-36RH
35J75R
30J150
-47RH
30J2R0
-75RH
30J4R7
-100H
30J6R8
30J15R -150H
30J27R
-1R0H
30J33R
-5R0H
30J50R
-10RH
30J82R
-25RH
30J100
-36RH
30J150
-47RH
-R500J
-75RH
-1R00J
-100H
-2R70J
-150H
-4R70J
-1R0H
-6R80J
-5R0H
-7R50J
-10RH
-10R0J
-25RH
-15R0J
-36RH
-25R0J
-47RH
-47R0J
-R500J
-75RH
-68R0J
-1R00J
-100H
-75R0J
-2R70J
-150H
-4R70J
-6R80J
-7R50J
-10R0J
-15R0J
-25R0J
-47R0J
-R500J
-68R0J
-1R00J
-75R0J
-2R70J
-4R70J
-6R80J
-7R50J
-10R0J
-15R0J
-25R0J
-47R0J
-68R0J
-75R0J