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Ohmite 40 Series resistors are the most economical conformal silicone-ceramic coated resistors offered. These all-welded units are characterized by their low temperature coefficients and resistance to thermal shock, making them ideal for a wide range of electrical and electronic applications.
Units with 1% and 5% tolerances are identical in construction and electrical specifications. Durable but economical 40 Series resistors exceed industry requirements for quality.
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FEATURES
- Economical
- Applications include commercial, industrial and communications equipment
- Stability under high temperature conditions
- All-welded construction
SPECIFICATIONS
Material
- Coating: Conformal silicone-ceramic.
- Core: Ceramic.
- Terminals: Solder-coated copper clad axial. RoHS solder composition is 96% Sn, 3.5% Ag, 0.5% Cu
- Derating: Linearly from 100% @ +25°C to 0% @ +275°C.
Electrical
- Tolerance: 5% (J type), 1% (F type) (other tolerances available).
- Power rating: Based on 25°C free air rating (other wattages available).
- 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
1Ω to 9.99Ω: 50 ppm/°C
10Ω and over: 20 ppm/°C
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