Datasheet

Ceramic Resistor Division
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax [phone] • www.ohmite.com • [e-mail]
139
SPECIFICATIONS
800 & 1000 Series
Tubular High Energy Bulk Ceramic
Length x Resistance Avg. Power Peak* Peak*
Type Diameter Min. Max. @40°C (W) Energy (J) Voltage** (V)
884SP 2" x 1/2" 1.0 200 22.5 250 1,000
885SP 2 1/2" x 3/4" 1.0 130 45 250 1,000
885AS 6.0 1200 15 2,800 8,000
885A 1500 220K 15 750 3,750
886SP 5" x 3/4" 1.0 330 90 500 4,000
886AS 15.0 3300 30 7,000 20,000
886A 3900 390K 30 1,500 10,000
887SP 6" x 1" 1.0 330 150 1,600 4,000
887AS 12.0 3300 50 13,000 30,000
887A 3900 390K 50 6,000 12,000
1026AS 6" x 1 1/2" 5.0 1200 70 30,000 30,000
888SP 8" x 1" 1.0 390 190 2,100 6,000
888AS 15.0 3900 75 16,500 45,000
888A 4700 470K 60 7,500 15,000
1028AS 8" x 1 1/2" 6.5 1900 100 46,000 45,000
889SP 12" x 1" 1.0 680 275 3,200 10,000
889AS 25.0 6800 100 27,000 75,000
889A 8200 680K 90 12,500 25,000
1032AS 12" x 1 1/2" 9.0 2500 150 75,000 75,000
890SP 18" x 1" 1.0 1000 375 4,200 16,000
890AS 40.0 10K 150 43,000 120,000
890A 12K 1M 125 20,000 40,000
1038AS 18" x 1 1/2" 15.0 3800 225 119,000 120,000
891SP 18" x 2" 1.0 450 750 15,000 16,000
892SP 24" x 2" 1.0 600 1000 17,500 22,000
1044AS 24" x 1 1/2" 20.0 4800 300 164,000 165,000
Series 800 and 1000 Tubular
Resistors are available in a
wide variety of sizes and ter-
minations 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.
* Allowable peak energy/voltage will depend on
the resistance value. Consult factory.
** Derate by 50% with oil resistant coating on
Type AS resistors. Energy ratings are based
on pulses <10 milliseconds. Type SP ratings
can be substantially greater for longer pulses.
Consult factory.
Characteristic Test Type SP Type AS Type A
Operating Temp.
-55°C to +350°C* -55°C to +230°C -55°C to +230°C
Resistance Temp.
Coefficient
+0.2 to -0.08 %/°C
(+ 2000 ppm - 800 ppm)
+0.0 to -0.08 %/°C
(+ 0 ppm - 800 ppm)
+0.0 to -0.2 %/°C
(+ 0 ppm - 2000 ppm)
Voltage Coefficient
Max. % per kilovolt per inch
active length
-1.0% -1.0% -
Short Time
Overload
Max. % change after 10
cycles of 1000% rated power
5 sec. On, 90 sec. Off
±5% ±2% -
Load Life
Max. % change after 1,000
hours at rated power
±5% ±5% -
Thermal Shock
Max. % change after 10
cycles -55°C to +125°C
±3% ±3% -
Moisture
Resistance
Max. % change when tested
per MIL-STD-202, Method 103
±5% ±5% ±5%
Density
2.2-2.4 gm/cc 2.2-2.6 gm/cc 2.2-2.6 gm/cc
Specific Heat
0.24-0.26 cal/gm -°C 0.23-0.25 cal/gm -°C 0.23-0.25 cal/gm -°C
Thermal
Conductivity
0.14-0.16 cal/(cm-°C-sec) 0.003-0.006 cal/(cm-°C-sec) 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
CHARACTERISTICS