810F20RE - Ohmite Manufacturing Co.

22 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

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 23

STANDARD PART NUMBERS

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.

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 capabili-

ties.

FEATURES

• High Stability: ±0.5% ΔR.

• High power to size ratio.

• Metal housing allows chassis

mounting and provides heat sink

capability.

89 Series

Metal-Mite® Aluminum Housed

Axial Term. Wirewound, 1% Tolerance

Series Wattage Ohms Voltage

805 5 0.10-25K 210

810 10 0.10-50K 320

825 25 0.005-75K 520

850 50 0.005-100K 1170

Non-Inductive versions available. Insert “N” before tolerance code. Example: 850NF560

terminal

hole dia.

}

mount

hole dia.

5 watt 10 watt 25 watt 50 watt

Series (Industrial) 805 810 825 850

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

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

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

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.

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



SPECIFICATIONS

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.

ORDERING INFORMATION

805NF5R0E

Series

805 = 5 Watt

810 = 10 watt

825 = 25 watt

850 = 50 watt

Ohms

R005= 0.005Ω

R10 = 0.1Ω

1R0 = 1.0Ω

250 = 250Ω

1K0 = 1,000Ω

1K5 = 1,500Ω

25K = 25,000Ω

RoHS

Compliant

Tolerance

F = 1%

J = 5%

Non-Inductive Winding

Optional (blank = std. winding)

As of September 2006,

the 89 Series is no longer

offered as Mil. Spec.

Check product availability at www.ohmite.com