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PDFs and Datasheets 800 & 1000 Series Datasheet

800 & 1000 Series Datasheet

Tubular High Energy Bulk Ceramic  

800 & 1000 series product image

 

The Ohmite Ceramic Resistor Division Tubular NonInductive 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 energy 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 materials to allow designers to meet the most demanding
requirements.

Material Types

 

TYPE SP 

Material composition type SP is
formulated to withstand high operating 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 energy 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 recommended 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 continuous 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

Series 800 and 1000 Tubular Resistors are available in a wide variety of sizes and terminations from 2" to 24" in length and ½" 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.

Specifications

Length x Diameter:

2" x 1/2"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

200

PowerPeak*@40°C (W):

22.5

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2 1/2" x 3/4"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

130

PowerPeak*@40°C (W):

45

Peak* Energy (J):

250

Voltage** (V):

1,000

Length x Diameter:

2 1/2" x 3/4"

ResistanceAvg.Min.:

6.0

ResistanceAvg.Max.:

1200

PowerPeak*@40°C (W):

15

Peak* Energy (J):

2,800

Voltage** (V):

8,000

Length x Diameter:

2 1/2" x 3/4"

ResistanceAvg.Min.:

1500

ResistanceAvg.Max.:

220K

PowerPeak*@40°C (W):

15

Peak* Energy (J):

750

Voltage** (V):

3,750

Length x Diameter:

5" x 3/4"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

330

PowerPeak*@40°C (W):

90

Peak* Energy (J):

500

Voltage** (V):

4,000

Length x Diameter:

5" x 3/4"

ResistanceAvg.Min.:

15.0

ResistanceAvg.Max.:

3300

PowerPeak*@40°C (W):

30

Peak* Energy (J):

7,000

Voltage** (V):

20,000

Length x Diameter:

5" x 3/4"

ResistanceAvg.Min.:

3900

ResistanceAvg.Max.:

390K

PowerPeak*@40°C (W):

30

Peak* Energy (J):

1,500

Voltage** (V):

10,000

Length x Diameter:

6" x 1"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

330

PowerPeak*@40°C (W):

150

Peak* Energy (J):

1,600

Voltage** (V):

4,000

Length x Diameter:

6" x 1"

ResistanceAvg.Min.:

12.0

ResistanceAvg.Max.:

3300

PowerPeak*@40°C (W):

50

Peak* Energy (J):

13,000

Voltage** (V):

30,000

Length x Diameter:

6" x 1"

ResistanceAvg.Min.:

3900

ResistanceAvg.Max.:

390K

PowerPeak*@40°C (W):

50

Peak* Energy (J):

6,000

Voltage** (V):

12,000

Length x Diameter:

6" x 1 1/2"

ResistanceAvg.Min.:

5.0

ResistanceAvg.Max.:

1200

PowerPeak*@40°C (W):

70

Peak* Energy (J):

30,000

Voltage** (V):

30,000

Length x Diameter:

8" x 1"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

390

PowerPeak*@40°C (W):

190

Peak* Energy (J):

2,100

Voltage** (V):

6,000

Length x Diameter:

8" x 1"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

390

PowerPeak*@40°C (W):

190

Peak* Energy (J):

2,100

Voltage** (V):

6,000

Length x Diameter:

8" x 1"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

390

PowerPeak*@40°C (W):

190

Peak* Energy (J):

2,1000

Voltage** (V):

6,000

Length x Diameter:

8" x 1"

ResistanceAvg.Min.:

4700

ResistanceAvg.Max.:

470K

PowerPeak*@40°C (W):

60

Peak* Energy (J):

7,500

Voltage** (V):

15,000

Length x Diameter:

8" x 1 1/2"

ResistanceAvg.Min.:

6.5

ResistanceAvg.Max.:

1900

PowerPeak*@40°C (W):

100

Peak* Energy (J):

46,000

Voltage** (V):

45,000

Length x Diameter:

12" x 1"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

680

PowerPeak*@40°C (W):

275

Peak* Energy (J):

3,200

Voltage** (V):

10,000

Length x Diameter:

12" x 1"

ResistanceAvg.Min.:

25.0

ResistanceAvg.Max.:

6800

PowerPeak*@40°C (W):

100

Peak* Energy (J):

27,000

Voltage** (V):

75,000

Length x Diameter:

12" x 1"

ResistanceAvg.Min.:

8200

ResistanceAvg.Max.:

680K

PowerPeak*@40°C (W):

90

Peak* Energy (J):

12,500

Voltage** (V):

25,000

Length x Diameter:

12" x 1 1/2"

ResistanceAvg.Min.:

9.0

ResistanceAvg.Max.:

2500

PowerPeak*@40°C (W):

150

Peak* Energy (J):

75,000

Voltage** (V):

75,000

Length x Diameter:

18" x 1"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

1000

PowerPeak*@40°C (W):

375

Peak* Energy (J):

4,200

Voltage** (V):

16,000

Length x Diameter:

18" x 1"

ResistanceAvg.Min.:

40.0

ResistanceAvg.Max.:

10K

PowerPeak*@40°C (W):

150

Peak* Energy (J):

43,000

Voltage** (V):

120,000

Length x Diameter:

18" x 1"

ResistanceAvg.Min.:

12K

ResistanceAvg.Max.:

1M

PowerPeak*@40°C (W):

125

Peak* Energy (J):

20,000

Voltage** (V):

40,000

Length x Diameter:

18" x 1 1/2"

ResistanceAvg.Min.:

15.0

ResistanceAvg.Max.:

3800

PowerPeak*@40°C (W):

225

Peak* Energy (J):

119,000

Voltage** (V):

120,000

Length x Diameter:

18" x 2"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

450

PowerPeak*@40°C (W):

750

Peak* Energy (J):

15,000

Voltage** (V):

16,000

Length x Diameter:

24" x 2"

ResistanceAvg.Min.:

1.0

ResistanceAvg.Max.:

600

PowerPeak*@40°C (W):

1000

Peak* Energy (J):

17,500

Voltage** (V):

22,000

Length x Diameter:

24" x 1 1/2"

ResistanceAvg.Min.:

20.0

ResistanceAvg.Max.:

4800

PowerPeak*@40°C (W):

300

Peak* Energy (J):

164,000

Voltage** (V):

165,000

 

* Allowable peak energy/voltage will depend on the resistance value. Consult factory.


** Derate by 50% with oil resistant coating onType AS resistors. Energy ratings are basedon pulses <10 milliseconds. Type SP ratings
can be substantially greater for longer pulses. Consult factory

Characteristics

Test

-55°C to +350°C*

Type SP

-55°C to +350°C*

Type AS

-55°C to +230°C

Type BA

-55°C to +230°C

Test

0

Type SP

+0.2 to -0.08 %/°C (+ 2000 ppm - 800 ppm)

Type AS

+0.0 to -0.08 %/°C (+0 ppm - 800 ppm)

Type BA

+0.0 to -0.2 %/°C (+ 0 ppm - 2000 ppm)

Test

Max. % per kilovolt per inch active length

Type SP

-1.0%

Type AS

-1.0%

Type BA

-

Test

Max. % change after 10 cycles of 1000% rated power 5 sec. On, 90 sec. Off

Type SP

±5%

Type AS

±2%

Type BA

-

Test

Max. % change after 1,000 hours at rated power

Type SP

±5%

Type AS

±5%

Type BA

-

Test

Max. % change after 10 cycles -55°C to +125°C

Type SP

±3%

Type AS

±3%

Type BA

-

Test

Max. % change when tested per MIL-STD-202, Method 103

Type SP

±5%

Type AS

±5%

Type BA

±5%

Test

0

Type SP

2.2-2.4 gm/cc

Type AS

2.2-2.6 gm/cc

Type BA

2.2-2.6 gm/cc

Test

0

Type SP

0.24-0.26 cal/gm -°C

Type AS

0.23-0.25 cal/gm -°C

Type BA

0.23-0.25 cal/gm -°C

Test

0

Type SP

0.14-0.16 cal/(cm-°C-sec)

Type AS

0.003-0.006 cal/(cm-°C-sec)

Type BA

0.003-0.006 cal/(cm-°C-sec)

 

*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: 2.0

B: 0.50

C (SP & AS): 0.22

C (A): -

D: 0.25

A: 2.5

B: 0.75

C (SP & AS): 0.5

C (A): N/A*

D: 0.50

A: 5.0

B: 0.75

C (SP & AS): 0.50

C (A): N/A*

D: 0.62

A: 6.0

B: 1.00

C (SP & AS): 0.75

C (A): 0.5

D: 0.50

A: 8.0

B: 1.00

C (SP & AS): 0.75

C (A): 0.5

D: 0.88

A: 12.0

B: 1.00

C (SP & AS): 0.75

C (A): 0.5

D: 0.88

A: 18.0

B: 1.00

C (SP & AS): 0.75

C (A): 0.5

D: 0.88

A: 18.0

B: 2.00

C (SP & AS): 1.50

C (A): -

D: 1.00

A: 24.0

B: 2.00

C (SP & AS): 1.50

C (A): -

D: 1.00

A: 6.0

B: 1.50

C (SP & AS): 1.00

C (A): -

D: 0.50

A: 8.0

B: 1.50

C (SP & AS): 1.00

C (A): -

D: 0.88

A: 12.0

B: 1.50

C (SP & AS): 1.00

C (A): -

D: 0.88

A: 18.0

B: 1.50

C (SP & AS): 1.00

C (A): -

D: 0.88

A: 24.0

B: 1.50

C (SP & AS): 1.00

C (A): -

D: 0.88

 

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: 885, 886

Resistor OD: 3/4

Holes: 1

A: 0.940

B: 0.155

C: 0.830

D: 0.750

E: N/A

F: 0.144

T: 0.020

V: 0.312

W In.: 0.625

Resistor Series: 887 - 890

Resistor OD: 1

Holes: 2

A: 1.230

B: 0.170

C: 1.070

D: 1.000

E: 0.320

F: 0.128

T: 0.024

V: 0.156

W In.: 0.625

Resistor Series: 1026 – 1044

Resistor OD: 1 1/2

Holes: 2

A: 1.650

B: 0.100

C: 1.650

D: 1.500

E: 0.925

F: 0.103

T: 0.032

V: 0.250

W In.: 0.500

Resistor Series: 891 , 892

Resistor OD: 2

Holes: 2

A: 2.375

B: 0.544

C: 1.080

D: 2.000

E: 0.375

F: 0.188

T: 0.043

V: 0.375

W In.: 0.750

 

 

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: 1

OD: 1 3/4

OD-1: 1 5/8

W: 1

E: 1.080

ID: 1/2

A: 3/16

B: 3/8

C: 0.75

Threaded Holes:

M3 x .5P x 3/16" DP

Resistor OD: 1 1/2

OD: 2 1/4

OD-1: 2 1/8

W: 1 1/8

E: 1.580

ID: 3/4

A: 3/16

B: 3/8

C: 0.75

Threaded Holes:

M4 x .7P x 3/16" DP

Resistor OD: 2

OD: 3

OD-1: 2 3/4

W: 1 1/8

E: 2.080

ID: 1

A: 5/16

B: 7/16

C: 0.88

Threaded Holes: M5 x .8P x 1/4" DP

Optional No-Arc Termination

Optional Radial Tab Termination

1" Copper Connector Cap

1" Copper Connector Cap with Strap

Ordering Information

Terminal Option

No Suffix = Standard aluminum metalized ends No-arc terminal not available on SP products G = Radial tab, riveted and soldered G1 = Radial tab, riveted and no solder

DS = Standard dielectric coating and silver metalized ends N = No-arc terminal and dielectric coating NO = No-arc terminal with oil resistant coating DG = Radial tab, riveted and soldered with dielectric coating DG1 = Radial tab, riveted and no solder with dielectric coating GO = Radial tab, riveted and soldered with oil resistant coating TO = Soldered end and oil resistant coating

Terminal Option

No Suffix = Standard nickel metalized ends D = Dielectric coating DG = Radial tab, riveted and soldered with dielectric coating N = No-arc terminal and dielectric coating NO = No-arc terminal with oil resistant coating DG = Radial tab, riveted and soldered with dielectric coating DG1 = Radial tab, riveted and no solder with dielectric coating GO = Radial tab with oil resistant coating TO = Soldered end and oil resistant coating

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