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Power-Mox Datasheet

Precision Power Thick Film High Voltage/High Resistance Tubular 

Res Powermox  product image

 

The heavy duty construction of the Power-Mox series make them durable in most high voltage industrial applications. This product is well known for its high voltage ratings, low voltage coefficients, very high ohmic values, and resistor divider options. Terminations can be selected to adapt to most mounting schemes.

Applications

  • Power Transmitters
  • Pollution Control Systems
  • Industrial Control Systems
  • Current pulse limiters
  • Vacuum and space application

Features

  • Wide resistance ranges
  • Outstanding voltage coefficient
  • 0.4” diameter ferrule, 0.25”-20 threaded end cap, or radial bands available
  • Metal oxide resistive elements

Series Specifications

Resistance Range (Ohms):

1K to 800,000M

Power @25°C:

25W

Voltage Rating:

20KV

Available Tolerances*:

0.5, 1, 2, 5%

Resistance Range (Ohms):

1.5K to 1,000,000M

Power @25°C:

40W

Voltage Rating:

30KV

Available Tolerances*:

0.5, 1, 2, 5%

Resistance Range (Ohms):

2K to 1,000,000M

Power @25°C:

50W

Voltage Rating:

45KV

Available Tolerances*:

0.5, 1, 2, 5%

Resistance Range (Ohms):

3K to 1,000,000M

Power @25°C:

75W

Voltage Rating:

60KV

Available Tolerances*:

0.5, 1, 2, 5%

 

*Some tolerances are not available over the entire resistance range

Characteristics

Ceramic

Varnish

1K to 1,000,000M

to 75W

to 60KV

-65°C to +180°C

25ppm: 0° to 85°C; 50ppm: -55° to 180°C

Dimensions

(in./mm) 

Power @25°C: 25W

A ± 0.05: 3.0" / 76.2

B Max: 0.770" / 19.56

Power @25°C: 40W

A ± 0.05: 4.5" / 114.3

B Max: 0.770" / 19.56

Power @25°C: 50W

A ± 0.05: 6.0" / 152.4

B Max: 0.770" / 19.56

Power @25°C: 75W

A ± 0.05: 8.0" / 203.2

B Max: 0.770" / 19.56

Res Powermox Dimensions

Ordering Information

Res Powermox Order Info

Power-Mox Dividers

Precision Power Thick Film High Voltage/High Resistance Tubular Dividers

Series Specifications

(dimensions as for Power-Mox)

Resistance Range (Ohms):

20K to 2,500M

Power @25°C:

15W

Voltage Rating:

15KV

Maximum Ratio:

5,000:1

Ratio Tolerances:

1, 2, 5%

Resistance Range (Ohms):

20K to 4,000M

Power @25°C:

30W

Voltage Rating:

25KV

Maximum Ratio:

5,000:1

Ratio Tolerances:

1, 2, 5%

Resistance Range (Ohms):

20K to 6,000M

Power @25°C:

40W

Voltage Rating:

35KV

Maximum Ratio:

5,000:1

Ratio Tolerances:

1, 2, 5%

Resistance Range (Ohms):

20K to 6,000M

Power @25°C:

60W

Voltage Rating:

50KV

Maximum Ratio:

5,000:1

Ratio Tolerances:

1, 2, 5%

 

Derating

Res Powermox Graph

Power-Mox Alternate Terminals

 

“01” Lead
“Power-Mox RD” Series
with silver terminations

Res Powermox Dimensions 1

 

“02” Lead
“Power-Mox” Series with
radial band option 

Res Powermox Dimensions 2

 

“03” Lead
“Power-Mox” Series
with Ferrule end caps

Res Powermox Dimensions 3

 

“04” Lead
“Power-Mox” Series with
1/4 - 20 threaded end caps

Res Powermox Dimensions 4

To specify Power-Mox Dividers, please see our website at:
www.ohmite.com/dividers

Ordering Information 

 

A complete description of the Power-MOX Divider is required.

EXAMPLE:
RT = 500MΩ 5%
R1 = 499.5MΩ 5%
R2 = 500KΩ 1%
Ratio = RT / R2 = 1,000: 1, 1%


To specify Power-Mox Dividers, please see our website at www.ohmite.com/dividers. Contact Ohmite for custom configurations.

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