The thermal resistance of the FCSL64R020DER is not explicitly stated in the datasheet, but according to Ohmite's application notes, the thermal resistance (RθJA) is typically around 10-15°C/W for this series of resistors.
While the FCSL64R020DER is a high-power resistor, it is not specifically designed for high-frequency applications. Ohmite recommends using their FFC series resistors for high-frequency applications due to their lower inductance and capacitance.
The FCSL64R020DER has a maximum voltage rating of 200V, but it's not recommended for high-voltage applications above 150V due to the risk of voltage coefficient effects and reduced reliability.
Ohmite recommends mounting the FCSL64R020DER horizontally to ensure proper heat dissipation and to prevent the resistor from sagging or bending due to its size and weight.
Ohmite recommends soldering the FCSL64R020DER at a temperature of 250-260°C (482-500°F) for 2-3 seconds, with a maximum soldering time of 5 seconds to prevent damage to the resistor.
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