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Ohmite 81F121 Wirewound Resistor
Ohmite’s 81F121 resistor is a high-quality, conformal axial terminal wirewound resistor ideal for applications demanding precision and stability. Constructed with an all-welded design and a silicone-ceramic conformal coating, this resistor offers excellent resistance to harsh environments and maintains a high degree of stability under demanding conditions. It’s suitable for precision power applications and is available in various ohmic values and wattage ratings to meet diverse circuit requirements. The resistor’s low temperature coefficient ensures consistent performance across a wide temperature range.
Ohmite 81F121 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 81F121?
You can click on the BUY or RFQ button to purchase 81F121 from an authorized Ohmite distributor.
How do I troubleshoot issues or seek technical support for part 81F121?
You can download the 81F121 datasheet or visit the Ohmite website for support.
Who is the manufacturer of 81F121?
Ohmite