Ohmite 89 Series Data Sheet

The 89 Series are high­performance axial-lead type
resistors. These molded­construction metal-housed
resistors are available in higher
power ratings than standard
axial-lead resistors and are
better suited to withstanding
vibration, shock and harsh
environmental 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
capabilities, 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
specifications.

FEATURES

• High Stability: ±0.5% DR.

• High power to size ratio.

• Metal housing allows chassis

mounting and provides heat sink
capability.

SPECIFICATIONS

Material

Housing: Metal, anodized

aluminum.

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
chassis; 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 ohm: ±90 ppm/°C
1 to 9.99 ohms: ±50 ppm/°C
10 ohms and over: ±20 ppm/°C.

Dielectric withstanding voltage:

5W and 10W rating,1000 VAC;
25 and 50W ratings, 2250 VAC.

Series Series

Series

Series Series

805 805

805 (RE60G) 5 0.10-25K 1.125 /

805 805
810 810

810 (RE65G) 10 0.10-50K 1.375 /

810 810
825 825

825 (RE70G) 25 0.005-75K 1.938 /

825 825
850 850

850 (RE75G) 50 0.005-100K 2.781 /

850 850

Non-Inductive versions available. Insert “N” before tolerance code. Non-Inductive versions available. Insert “N” before tolerance code.

Non-Inductive versions available. Insert “N” before tolerance code.

Non-Inductive versions available. Insert “N” before tolerance code. Non-Inductive versions available. Insert “N” before tolerance code.

WattageWattage

Wattage

WattageWattage

89 Series

®

Metal-Mite

Aluminum Housed Axial Lead

Wirewound Resistors 1% Tolerance

R

P

N
lead
hole
dia.

D

Dimensions (in. / Dimensions (in. /

Dimensions (in. /

OhmsOhms

Ohms

OhmsOhms

Dimensions (in. / Dimensions (in. /

LengthLength

Length

LengthLength

28.58

34.93

49.23

70.64

Power rating (watts)Power rating (watts)

Power rating (watts)

Power rating (watts)Power rating (watts)
Dim. A (in. ±.005/mm ±.127) 0.444/
Dim. B (in. ±.005/mm ±.127) 0.490/
Dim. C (in. ±.031/mm ±.787) 0.600/
Dim. D (in. ±.0025/mm ±.064) 0.245/
Dim. E (in. ±.015/mm ±.381) 0.334/
Dim. F (in. ±.015/mm ±.381) 0.646/
Dim. G (in. ±.015/mm ±.381) 0.320/
Dim. H (in. ±.010/mm ±.254) 0.060/
Dim. J (in. ±.015/mm ±.381) 0.156/
Dim. K (in. ±.010/mm ±.254) 0.078/
Dim. L (in. ±.005/mm ±.127) 0.093/
Dim. M (in., min/mm, min) 0.085/
Dim. N (in. ±.005/mm ±.127) 0.050/
Dim. P (in. ±.062/mm ±1.58) 0.266/
Dim. R (in. ±.062/mm ±1.58) 1.125/

S min AWG 16 12 12 12
Diam. S (mm) 1.29 2.05 2.05 2.05

L dia.

mmmm

mm

mmmm

C

AK

))

)

))

0.320 /

0.390 /

0.546 /

0.610 /

MIL-R-18546 Approved

F

B

E

S

HeightHeight

Height

HeightHeight

8.13

9.91

13.87

15.49

Example Example

Example

Example Example

55

5

55

11.28

12.45

15.24

6.22

8.48

16.41

8.13

1.52

3.90

1.98

2.36

2.16

1.27

6.76

28.58

- 850NF560- 850NF560

- 850NF560

- 850NF560- 850NF560

0.562/

0.625/

0.750/

0.312/

0.420/

0.800/

0.390/

0.075/

0.183/

0.093/

0.093/

0.140/

0.086/

0.312/

1.375/

WidthWidth

Width

WidthWidth

0.646 /

0.800 /

1.080 /

1.140 /

1010

10

1010

14.27

15.88

19.05

7.93

10.67

20.32

9.91

1.90

4.65

2.36

2.36

3.56

2.18

7.92

34.93

16.41

20.32

27.43

28.96

.0719/

0.781/

1.062/

0.391/

0.550/

1.080/

0.546/

0.088/

0.231/

0.172/

0.125/

0.140/

0.086/

0.438/

1.938/

2525

25

2525

18.26

19.84

26.97

9.93

13.97

27.43

13.87

2.24

2.54

4.37

3.18

3.56

2.18

11.13

49.23

G

}

VoltageVoltage

Voltage

VoltageVoltage

210
320
520

1170

1.563/

0.844/

1.968/

0.422/

0.630/

1.140/

0.610/

0.088/

0.260/

0.196/

0.125/

0.140/

0.086/

0.438/

2.781/

5050

50

5050

J

M

H

39.70

21.44

49.99

10.72

16.00

28.96

15.49

2.24

2.54

4.98

3.18

3.56

2.18

11.13

70.64

STOCK PART NUMBERS FOR STANDARD RESISTANCE VALUES

WattageWattage

Wattage

WattageWattage

5 5

5 5

10 10

10 10

25 25

25 25

5

10

Part No.Part No.

Part No.

Part No.Part No.

➡➡

Prefix

➡

➡➡

➡

➡

Suffix

Ohmic valueOhmic value

Ohmic valueOhmic value

Ohmic value

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 ✙ ✔ ✙✙

––––––

––––––

–––

805F

––––––

––––––

–––

810F

25

––––––

––––––

–––

825F

50 50

50 50

50

––––––

––––––

–––

850F

Part No.Part No.

Part No.

Part No.Part No.
Prefix
Suffix

Ohmic valueOhmic value

Ohmic valueOhmic value

Ohmic value
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 ✜✔✙✔

WattageWattage

Wattage

WattageWattage

5 5

5 5

10 10

10 10

25 25

25 25

50 50

10

––––––

––––––

–––

810F

25

––––––

––––––

–––

825F

50 50

50

––––––

––––––

–––

850F

100,000 –––100K ✜

Part No.Part No.

Part No.

Part No.Part No.
Prefix
Suffix

Ohmic valueOhmic value

Ohmic valueOhmic value

Ohmic value
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 ✜

5

––––––

––––––

–––

➡➡

➡

➡➡
➡

805F

Ohmite Manufacturing Company 3601 Howard St., Skokie, IL 60076 • Tel. [phone] • Fax [phone] • Website: www.ohmite.com • E-mail: [e-mail]

WattageWattage

Wattage

WattageWattage

5 5

5 5

10 10

10 10

25 25

25 25

50 50

10

––––––

––––––

–––

810F

25

––––––

––––––

–––

825F

50 50

50

––––––

––––––

–––

850F

5

––––––

––––––

–––

➡➡

➡

➡➡

➡

805F

✙ = Most popular stock values

✔ = Stock values
✜ = Non-stock 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.

15