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PDFs and Datasheets New Ohmite PDF Datasheet

800 & 1000 SERIES DATASHEET

Tubular High Energy Bulk Ceramic

800 & 1000 series product image

 

The Ohmite Ceramic Resistor Division Tubular Non- Inductive Bulk Ceramic Resistors provide excellent performance for high peak power or high-energy pulses. Bulk construction advantageously produces an inherently non-inductive resistor; and it allows ener- gy and power to be uniformly distributed through the entire ceramic resistor body – there is no film or wire to fail. Ohmite offers a full line of rugged, reliable ceramic resistors.

Ohmite offers three distinctly different ceramic mate- rials to allow designers to meet the most demanding requirements.

Features

  • Ideal for current sensing applications
  • 1% Tolerance standard, others available
  • Fixed resistance measuring point "M"
  • Low inductance (non-inductive below 0.25Ω)
  • RoHS compliant product available; add "E" suffix part number to specify

Applications

  • Ideal for current sensing applications
  • 1% Tolerance standard, others available
  • Fixed resistance measuring point "M"
  • Low inductance (non-inductive below 0.25Ω)
  • RoHS compliant product available; add "E" suffix part number to specify

Material Types

Type SP

Material composition type SP is formulated to withstand high oper- ating temperatures resulting in high power dissipation. Maximum continuous operating temperature is specified at 350°C. This type is suitable for use in oil without an oil-resistant coating.

Applications

  • Motor drive circuits
  • Snubber circuits
  • High-frequency circuits
  • RF dummy loads
  • Dynamic braking
  • Transformer protection
  • Harmonic filter

TYPE AS

Material composition type AS is formulated to withstand high ener- gy and high voltage applications. Maximum continuous operating temperature is specified at 230°C. The standard dielectric coating is recommended for use in air, and the oil-resistant coating is recom- mended for use in oil.

Applications

  • Impulse generators
  • High-voltage circuits
  • X-ray equipment
  • High voltage power supplies
  • Laser/Imaging equipment
  • Capacitor charge/discharge

TYPE BA

Material composition type BA is formulated with to reach higher resistance values. Maximum con- tinuous operating temperature is specified at 230°C. The standard dielectric coating is recommended for use in air, and the oil-resistant coating is recommended for use in oil.

Applications

  • Bleeder
  • Capacitor charge/discharge

Specifications

Series 800 and 1000 Tubular Resistors are available in a wide variety of sizes and termi- nations from 2" to 24" in length and 1⁄2" to 2" in diameter. These resistors can handle up to 1000 watts, 165 kJ and 165 kV in resistance values from 1 ohm to 1 megohm.

Length x Diameter:

2" x 1/2"

Resistance Avg. PowerPeak*

Min: 1.0 Max: 200 @40℃ (W): 22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2" x 1/2"

Resistance Avg. PowerPeak*

Min: 1.0 Max: 200 @40℃ (W): 22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2" x 1/2"

Resistance Avg. PowerPeak*

Min: 1.0 Max: 200 @40℃ (W): 22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2" x 1/2"

Resistance Avg. PowerPeak*

Min: 1.0 Max: 200 @40℃ (W): 22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2" x 1/2"

Resistance Avg. PowerPeak*

Min: 1.0 Max: 200 @40℃ (W): 22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2" x 1/2"

Resistance Avg. PowerPeak*

Min: 1.0 Max: 200 @40℃ (W): 22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2" x 1/2"

Resistance Avg. PowerPeak*

Min: 1.0 Max: 200 @40℃ (W): 22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Characteristics

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

Max. % per kilovolt per inch active length.

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

 

*When required, Type SP material can withstand short periods of use at red-heat conditions, i.e. up to 550°C to 600°C

Derating

chart alt text here

Power ratings are based on maximum allowable surface temperature in still air at 40°C ambient temperature.

Surface Temperature

chart alt text here

Vurve is typical for resistor midpoint with 300 horizontal orientation in 250 still air.

Dimensions

A: 2

B: 0.5

C (SP & AS): 22

C (A): N/A

D: 25

A: 2

B: 0.5

C (SP & AS): 22

C (A): N/A

D: 25

A: 2

B: 0.5

C (SP & AS): 22

C (A): N/A

D: 25

A: 2

B: 0.5

C (SP & AS): 22

C (A): N/A

D: 25

 

Special sizes are available. Consult factory.
*885 and 886 in type BA material are solid rods

Termination Options

Electrical connection to the resistive bodies of resistors is made by metal end bands. The standard metal is alumi- num for Type SP, silver for Type AS and nickel for Type BA. Special terminations of brass, copper or soldered ends are also available.

Mounting Clips

In most cases, connections to the resistors may be made by using these stock clips.

Material: Beryllium Copper Finish: Electro Tin Plate

Resistor Series: 884

Resistor OD: 1/2

Holes: 0.620

A: 0.620

B: 0.620

C: 0.620

D: 0.620

E: N/A

F: 0.620

T: 0.620

V: 0.620

W In.: 0.620

Resistor Series: 884

Resistor OD: 1/2

Holes: 0.620

A: 0.620

B: 0.620

C: 0.620

D: 0.620

E: N/A

F: 0.620

T: 0.620

V: 0.620

W In.: 0.620

Resistor Series: 884

Resistor OD: 1/2

Holes: 0.620

A: 0.620

B: 0.620

C: 0.620

D: 0.620

E: N/A

F: 0.620

T: 0.620

V: 0.620

W In.: 0.620

Resistor Series: 884

Resistor OD: 1/2

Holes: 0.620

A: 0.620

B: 0.620

C: 0.620

D: 0.620

E: N/A

F: 0.620

T: 0.620

V: 0.620

W In.: 0.620

Aluminum Connector Caps

Resistor OD: 3/4

OD: 1 1/2

OD-1: 1 3/8

W: 3/4

E: 0.830

ID: 3/8

A: 3/16

B: 3/16

C: 0.5

Threaded Holes:

M3 x .5P x 3/16" DP

Resistor OD: 3/4

OD: 1 1/2

OD-1: 1 3/8

W: 3/4

E: 0.830

ID: 3/8

A: 3/16

B: 3/16

C: 0.5

Threaded Holes:

M3 x .5P x 3/16" DP

Resistor OD: 3/4

OD: 1 1/2

OD-1: 1 3/8

W: 3/4

E: 0.830

ID: 3/8

A: 3/16

B: 3/16

C: 0.5

Threaded Holes:

M3 x .5P x 3/16" DP

Resistor OD: 3/4

OD: 1 1/2

OD-1: 1 3/8

W: 3/4

E: 0.830

ID: 3/8

A: 3/16

B: 3/16

C: 0.5

Threaded Holes:

M3 x .5P x 3/16" DP

Optional No-Arc Termination

Optional Radial Tab Termination

1" Copper Connector Cap

1" Copper Connector Cap with Strap

Ordering Information

Terminal Option

NoSuffix = Standardaluminummetalizedends No-arc terminal not available on SP productsG = Radial tab, riveted and solderedG1 = Radial tab, riveted and no solder

Terminal Option

NoSuffix = Standardaluminummetalizedends No-arc terminal not available on SP productsG = Radial tab, riveted and solderedG1 = Radial tab, riveted and no solder

Terminal Option

NoSuffix = Standardaluminummetalizedends No-arc terminal not available on SP productsG = Radial tab, riveted and solderedG1 = Radial tab, riveted and no solder

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