The 89 Series is a high-per-
formance axial type resistor.
These molded-construction
metal-housed resistors are
available in higher power rat-
ings than standard axial resis-
tors and are better suited to
withstanding vibration, shock
and harsh environmental con-
ditions.
S P E C I F I C A T I O N S
Material
Housing: Metal, anodized alumi-
num.
Internal Coating: Silicone.
Core: Ceramic.
Terminals: Solder-coated axial.
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 1Ω: ±90 ppm/°C
1 to 9.99Ω: ±50 ppm/°C
10Ω and over: ±20 ppm/°C.
Dielectric withstanding voltage:
5W and 10W rating,1000 VAC;
25 and 50W ratings, 2250 VAC.
89 Series
Axial Term. Wirewound, 1% Tolerance
®
Metal-Mite Aluminum Housed
A
L
F
E
M
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
H
J
B
G
R
Q
K
N
mount
hole dia.
provides heat-sinking capabili-
ties.
P
C
D
terminal
hole dia.
F E A T U R E S
• High Stability: ±0.5% ΔR.
• High power to size ratio.
• Metal housing allows chassis
mounting and provides heat sink
capability.
Series
805
Wattage
Ohms
0.10-25K
0.10-50K
Voltage
210
320
5
810
825
850
10
25
50
0.005-75K
0.005-100K
520
1170
As of September 2006,
the 89 Series is no longer
offered as Mil. Spec.
Non-Inductive versions available. Insert “N” before tolerance code. Example: 850NF560
5 watt
805
10 watt
810
25 watt
825
50 watt
850
Series (Industrial)
Dimensions
Dim. A (in. ±0.062 / mm ±1.57) 1.125 / 28.59 1.375 / 34.93 1.938 / 49.23 2.781 / 70.64
Dim. B (in. ±0.010 / mm ±0.25) 0.490 / 12.45 0.625 / 15.88 0.781 / 19.84 0.844 / 21.44
Dim. C (in. ±0.031 / mm ±0.79) 0.078 / 1.98 0.094 / 2.39 0.172 / 4.37 0.188 / 4.78
Dim. D (in. ±0.010 / mm ±0.25) 0.444 / 11.28 0.562 / 14.28 0.719 / 18.26 1.562 / 39.68
Dim. E (in. ±0.062 / mm ±1.57) 0.600 / 15.24 0.750 / 19.05 1.062 / 26.98 1.938 / 49.23
Dim. F (in. ±0.062 / mm ±1.57) 0.266 / 6.76 0.312 / 7.93 0.438 / 11.13 0.438 / 11.13
Dim. G (in. ±0.062 / mm ±1.57) 0.334 / 8.48 0.438 / 11.13 0.531 / 13.49 0.594 / 15.09
Dim. H (in. ±0.031 / mm ±0.79) 0.245 / 6.22 0.312 / 7.93 0.391 / 9.93 0.422 / 10.72
Dim. J (in. ±0.031 / mm ±0.79) 0.646 / 16.41 0.812 / 20.63 1.094 / 27.79 1.156 / 29.36
Dim. K (in. ±0.005 / mm ±0.13) 0.093 / 2.36 0.094 / 2.39 0.125 / 3.18 0.125 / 3.18
O R D E R I N G I N F O R M AT I O N
Non-Inductive Winding
Optional (blank = std. winding)
8 0 5 N F 5 R 0 E
Series
Tolerance Ohms
RoHS
805 = 5 Watt
810 = 10 watt
825 = 25 watt
850 = 50 watt
F = 1%
J = 5%
R005= 0.005Ω Compliant
R10 = 0.1Ω
1R0 = 1.0Ω
Dim. L (in. ±0.031 / mm ±0.79) 0.320 / 8.13 0.406 / 10.31 0.562 / 14.28 0.625 / 15.88
Dim. M (in. ±0.062 / mm ±1.57) 0.133 / 3.38 0.203 / 5.16 0.281 / 7.14 0.312 / 7.92
Dim. N (in. ±0.031 / mm ±0.79) 0.065 / 1.65 0.094 / 2.39 0.094 / 2.39 0.094 / 2.39
Dim. P (in. ±0.005 / mm ±0.13) 0.050 / 1.27 0.085 / 2.16 0.085 / 2.16 0.085 / 2.16
250
1K0
1K5
=
=
=
250Ω
1,000Ω
1,500Ω
25K = 25,000Ω
Q min AWG
16
12
12
12
Dim. R (in., min/mm, min)
0.085/ 2.16 0.140/ 3.56 0.140/ 3.56 0.140/ 3.56
S TA N D A R D P A R T N U M B E R S
Wattage
Wattage
Wattage
Part No.
Prefix
Part No.
Prefix
Part No.
Prefix
Suffix
Suffix
Suffix
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
= Standard values
= Non-standard values subject to minimum
handling charge per item
Shaded values involve very fine resistance wire and
should not be used in critical applications without
burn-in and/or thermal cycling.
Check product availability at www.ohmite.com
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 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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