24
Ohmite Mfg. Co.
1600 Golf Rd., Suite 850, Rolling Meadows, IL 60008 • Tel. 1-866-9-OHMITE • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
Ohmite Mfg. Co.
STOCK PART NUMBERS FOR STANDARD RESISTANCE VALUES
The 89 Series are high-perfor-
mance axial-lead type resis-
tion metal-housed resistors are
available in higher power rat-
ings than standard axial-lead
resistors and are better suited
to withstanding vibration,
shock and harsh environmen-
tal conditions.
The 89 Series Metal-Mite
®
resistors are aluminum housed
to maintain high stability during
operation and to permit secure
mounting to chassis surfaces.
The metal housing also
provides heat-sinking capa-
bilities, allowing the units to
exceed the power ratings set
by MIL specifications. Use the
89 Series resistors with the
confidence that they meet or
exceed MIL-R-18546 specifi-
cations.
89 Series
Metal-Mite
®
MIL-R-18546 Approved
Aluminum Housed Axial Lead
Wirewound Resistors 1% Tolerance
Dimensions (in. /
mm
)
Series
Wattage
Ohms
Length
Height
Width
Voltage
805
805
(RE60G)
(RE60G)
5
5
0.10-25K
0.10-25K
1.125 /
1.125 /
28.58
28.58
0.320 /
0.320 /
8.13
8.13
0.646 /
0.646 /
16.41
16.41
210
210
810
(RE65G)
10
0.10-50K
1.375 /
34.93
0.390 /
9.91
0.800 /
20.32
320
825
825
(RE70G)
(RE70G)
25
25
0.005-75K
0.005-75K
1.938 /
1.938 /
49.23
49.23
0.546 /
0.546 /
13.87
13.87
1.080 /
1.080 /
27.43
27.43
520
520
850
(RE75G)
50
0.005-100K
2.781 /
70.64
0.610 /
15.49
1.140 /
28.96
1170
Non-Inductive versions available. Insert “N” before tolerance code. Example: 850NF560
N
lead
hole
dia.
F
M
B
S
A
E
G
J
R
C
H
Dim. (in. ±.010/
mm ±.254
)
5 watt
10 watt
25 watt
50 watt
Dim. A
0.444/
11.28
11.28 11.28
0.562/
14.27
14.27 14.27
0.719/
18.26
1.563/
39.70
Dim. B
0.490/
12.45
12.45 12.45
0.625/
15.88
0.781/
19.84
0.844/
21.44
Dim. C
0.600/
15.24
15.24 15.24
0.750/
19.05
1.062/
26.97
26.97 26.97
1.968/
49.99
Dim. E
0.334/
8.48
0.334/ 8.480.334/
0.420/
10.67
10.67 10.67
0.550/
13.97
13.97 13.97
0.630/
16.00
Dim. F
0.646/
16.41
0.800/
20.32
1.080/
27.43
1.140/
28.96
Dim. G
0.320/
8.13
0.320/ 8.130.320/
0.390/
9.91
0.546/
13.87
13.87 13.87
0.610/
15.49
Dim. H
0.060/
1.52
0.060/ 1.520.060/
0.075/
1.90
0.075/ 1.900.075/
1.90 1.90
0.088/
2.24
0.088/ 2.240.088/
0.088/
2.24
0.088/ 2.240.088/
Dim. J
0.156/
3.90
0.156/ 3.900.156/
0.183/
4.65
0.183/ 4.650.183/
4.65 4.65
0.231/
2.54
0.231/ 2.540.231/
0.260/
2.54
0.260/ 2.540.260/
Dim. M
0.085/
2.16
0.085/ 2.160.085/
0.140/
3.56
3.56 3.56
0.140/
3.56
0.140/ 3.560.140/
0.140/
3.56
Dim. N
0.050/
1.27
0.086/
2.18
0.086/ 2.180.086/
2.18 2.18
0.086/
2.18
0.086/ 2.180.086/
0.086/
2.18
0.086/ 2.180.086/
Dim. R
1.125/
28.58
28.58 28.58
1.375/
34.93
1.938/
49.23
2.781/
70.64
S min AWG
16
12
12
12
Diam. S (mm)
1.29
1.29 1.29
2.05
2.05
2.05
0.005
–––
R005
0.010
–––
R010
0.025
–––
R025
0.1
–––
R10
0.3
–––
R30
0.5
–––
R50
0.7
–––
R70
1.0
–––
1R0
1.5
–––
1R5
2.0
–––
2R0
3.0
–––
3R0
4.0
–––
4R0
5.0
–––
5R0
10.0
–––
10R
15.0
–––
15R
20
–––
20R
25
–––
25R
30
–––
30R
40
–––
40R
50
–––
50R
75
–––
75R
100
–––
100
150
–––
150
200
–––
200
250
–––
250
300
–––
300
400
–––
400
500
–––
500
750
–––
750
1,000
–––
1K0
1,500
–––
1K5
2,000
–––
2K0
2,500
–––
2K5
3,000
–––
3K0
3,500
–––
3K5
4,000
–––
4K0
4,500
–––
4K5
5,000
–––
5K0
6,000
–––
6K0
10,000
–––
10K
15,000
–––
15K
20,000
–––
20K
25,000
–––
25K
50,000
–––
50K
75,000
–––
75K
100,000
–––
100K
=
Most popular stock values
=
Stock values
=
Non-stock values subject to minimum handling
charge per item
Non-stock values subject to minimum handling
charge per item
Non-stock values subject to minimum handling
Shaded values involve very fine resistance wire and
should not be used in critical applications without
Shaded values involve very fine resistance wire and
should not be used in critical applications without
Shaded values involve very fine resistance wire and
burn-in and/or thermal cycling.
should not be used in critical applications without
burn-in and/or thermal cycling.
should not be used in critical applications without
Ohmic value
805F
–––
5
810F
–––
10
825F
–––
25
850F
–––
50
Wattage
Part No.
Prefix
Suffix
Ohmic value
805F
–––
5
810F
–––
10
825F
–––
25
850F
–––
50
Wattage
Part No.
Prefix
Suffix
Ohmic value
805F
–––
5
810F
–––
10
825F
–––
25
850F
–––
50
Wattage
Part No.
Prefix
Suffix
FEATURES
•
High Stability: ±0.5%
∆
R.
•
High power to size ratio.
•
Metal housing allows chassis
mounting and provides heat sink
capability.
SPECIFICATIONS
Material
Housing:
Metal, anodized alumi-
num.
Internal Coating:
Silicone.
Core:
Ceramic.
Terminals:
Solder-coated axial
lead.
Derating
: Linearly from
100% @ +25°C to 0% @
+275°C.
Electrical
Tolerance:
±1% and ±5% (other
tolerances available).
Power rating:
Rating is based
on chassis mounting area and
temperature stability. Proper
heat sink as follows: 5W and
10W units, 4” x 6” x 2” x .040”
Aluminum chassis; 25W units, 5”
x 7” x 2” x .040” Aluminum chas-
sis; 50W units, 12” x 12” x .059”
Aluminum panel.
Maximum ohmic values:
See chart.
Overload:
5 times rated wattage
for 5 seconds.
Temperature coefficient:
Under 1
Ω
: ±90 ppm/°C
1 to 9.99
Ω
: ±50 ppm/°C
10
Ω
and over: ±20 ppm/°C.
Dielectric withstanding voltage:
5W and 10W rating,1000 VAC;
25 and 50W ratings, 2250 VAC.