The maximum power dissipation of the UA741CDRG4 is 500mW, which is limited by the package thermal resistance and the ambient temperature.
While the UA741CDRG4 can be used as a comparator, it's not the best choice due to its limited slew rate and bandwidth. A dedicated comparator like the LM339 or LM2901 would be a better option.
To minimize noise and oscillations, keep the input and output traces short and away from each other, use a solid ground plane, and decouple the power supply with capacitors. Also, consider using a guard ring around the op-amp to reduce noise coupling.
The input impedance of the UA741CDRG4 is typically around 2MΩ, but it can vary depending on the specific application and operating conditions.
The UA741CDRG4 is rated for operation up to 70°C, but its performance may degrade at higher temperatures. If you need to operate in a high-temperature environment, consider using a more temperature-stable op-amp like the OPA741 or OPA2171.