Slab Resistors
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Series 500SP Slab Resistors provide high power and energy dissipation in a compact size. Proprietary
bulk ceramic "SP" material is used in a simple, efficient design that permits energy to be uniformly
absorbed throughout the resistor body, thereby avoiding failure in a peripheral film or wire.
A cost-effective space saving solution
The 500 SP series design enables the designer to minimize resistor package size and cost while
providing unequalled performance and reliability. The slim, compact resistors offer a number of
termination options allowing easy configuration for specific requirements.
Applications
- Motor Drive Controls
- Power Supplies
- Power Conditioning Equipment
- Soft Start/Current Limit Circuits
- Dynamic Braking
- Snubber Circuits
- RF Dummy Load Circuits
- Capacitor Dump Circuits
Standard Products
Monolithic Bulk Ceramic Shape
Standard units are 1" wide by ¼" thick in variable lengths of 2, 3, 4, 6, 8 and 10 inches. Aluminum metallized ends with or without radial tabs are standard. Other lengths to 10" maximum are available.
Rated average power is 15 watts per inch of length based on 350°C maximum operating temperature with 40°C ambient.
Specifications
Type |
Length (L) |
Resistance Range (Ohms) |
Average Power @ 40°C Amb. (Watts) |
Peak* Energy @40°C Amb. (Joules)* |
Peak Voltage (Volts) |
Resistor Weight (Grams) |
502SP |
2" [50.8mm] |
0.2-80 |
30 |
150 |
900 |
15 |
503SP |
3" [76.2mm] |
0.3-150 |
45 |
290 |
1900 |
22.5 |
504SP |
4" [101.6mm] |
0.4-210 |
60 |
480 |
2800 |
30 |
506SP |
6" [152.4mm] |
0.8-340 |
90 |
800 |
4700 |
45 |
508SP |
8" [203.2mm] |
1.0-470 |
120 |
1100 |
6700 |
60 |
510SP |
10" [254.0mm] |
1.3-600 |
150 |
1400 |
8500 |
75 |
Characteristics
Operating Temperature |
-55°C to +350°C |
Temperature Coefficient |
+ 0.2 to - 0.08 %/°C |
Short Time Overload
Max. % change after 5 cycles - 10 times rated power, 5 seconds on, 90 seconds off |
± 2% |
Load Life
Max. % change after 1000 hrs. rated power 1-1/2 hours on; 1/2 hour off |
±5% |
Thermal Shock
Max. % change after 10 cycles -55°C to +125°C |
±3% |
Moisture Resistance
Max. % change when tested per MIL-STD-202, Method 103 |
±5% |
(1) Note: When required, Type SP material can withstand short periods of use at red-heat conditions, i.e. up to 550 to 600°C
Typical Physical Properties
Density |
2.2-2.4 gm/cc |
Specific Heat |
0.24-0.26 cal/gm°C |
Thermal Conductivity |
0.14-0.16 cal/cm/°C/sec |
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