DISTRONICA – SEMTEX INTERNATIONAL – OHMITE
Resistencias Ceramicas Series 500AS (NON-INDUCTIVE BULK CERAMIC SLAB RESISTORS SERIES 500AS)
Type 500AS non-inductive slab resistors
The type 500AS series of slab resistors provide excellent high voltage pulse and energy capability for applications where extra voltage and energy capability are required. Typical applications for 500AS slab resistors are:
- High voltage power supply resistors
- High energy capacitor charge/discharge resistors
- Pulse test equipment resistors
- Radar/broadcast transmitter resistors
- Laser/imaging equipment resistors
| Product characteristics | |
| Operating temperature | -55°C to +230°C (-67 to 446°F) |
| Temperature coefficient | + 0.0 to -0.08 %/°C |
| Short time overload 1) | ±2% |
| Load life 2) | ±5% |
| Thermal shock 3) | ±3% |
| Moisture resistance 4) | ±5% |
Note: When required, type SP material can withstand short periods of use at red-heat conditions, i.e. up to 550-600°C (1031-1112°F)
1) Max. % change after 5 cycles – 10 times rated power, 5 seconds on, 90 seconds off
2) Max. % change after 1000 hrs. rated power 1-1/2 hours on; 1/2 hour off
3) Max. % change after 10 cycles -55 to +125°C (-67 to 257°F)
4)Max. % change when tested per MIL-STD-202, Method 103
| Physical properties (nominal) | |
| Density | 2.2-2.4 gm/cc |
| Specific heat | 0.22-0.24 cal/gm°C |
| Thermal conductivity | 0.003-0.006 cal/cm/°C/sec |
