The thermal resistance of the FSR05BE is not explicitly stated in the datasheet, but according to Ohmite's application notes, the thermal resistance from junction to case (RθJC) is approximately 1.5°C/W, and from case to ambient (RθCA) is approximately 10°C/W.
While the FSR05BE is primarily designed for low-frequency applications, it can be used in high-frequency applications up to 100 kHz with some caution. However, the inductance and capacitance of the resistor may affect its performance at high frequencies, and additional derating may be necessary.
The FSR05BE's power rating decreases with increasing temperature. To handle this, you should derate the power by 1.25% per degree Celsius above 25°C. For example, at 50°C, the power rating would be 75% of the maximum power rating at 25°C.
The FSR05BE is designed to withstand moderate vibration and shock, but it may not be suitable for extreme environments. If your application involves high vibration or shock, you should consider using a more ruggedized resistor or taking additional measures to secure the component.
The FSR05BE is not designed for use in humid or wet environments. It has a moisture sensitivity level (MSL) of 3, which means it can be damaged by exposure to moisture. If your application involves high humidity or water exposure, you should consider using a more environmentally resistant resistor or taking additional measures to protect the component.
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