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Ohmite 81F499 Wirewound Resistor
Ohmite’s 81F499 resistor is a high-quality conformal axial terminal wirewound resistor specifically engineered for precision power applications. Its silicone-ceramic conformal coating provides exceptional stability and protection under demanding conditions. The all-welded construction ensures robust performance, while the low temperature coefficient maintains accuracy over a wide temperature range. These resistors are suitable for various industrial applications where precision and reliability are paramount, including power supplies, motor control, and instrumentation.
Ohmite 81F499 Wirewound Resistor Specifications:
- Coating: Silicone-ceramic
- Core: Ceramic
- Terminals: Solder-coated copper clad axial
- Derating: Linearly from 100% @ +25°C to 0% @ +275°C
- Tolerance: ±5% (J type), ±1% (F type)
- Power rating: Based on 25°C free air rating
- Maximum ohmic values: See chart
- Overload: Under 5 watts: 5 times rated wattage for 5 seconds. 5 watts and over: 10 times rated wattage for 5 seconds
- Temperature coefficient: Under 1Ω: ±90 ppm/°C, 1 to 9.99Ω: ±50 ppm/°C, 10Ω and over: ±20 ppm/°C
- Dielectric withstanding voltage: 500 VAC: 1 watt rating; 1000 VAC: 2, 3, 5, 7, and 10 watt rating
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Frequently Asked Questions
Where can I buy Ohmite 81F499?
You can click on the BUY or RFQ button to purchase 81F499 from an authorized Ohmite distributor.
How do I troubleshoot issues or seek technical support for part 81F499?
You can download the 81F499 datasheet or visit the Ohmite website for support.
Who is the manufacturer of 81F499?
Ohmite