Which rating classification limits the temperature rise to 181 °C (325 °F) above its initial temperature?

The classification that limits the temperature rise to 181 °C (325 °F) above its initial temperature belongs to the "T" rating. This rating is specifically designed to denote the maximum temperature that can be tolerated while maintaining safe operational standards.

In more detail, the "T" rating is part of a temperature classification system that sets forth specific thermal thresholds for electrical devices and components, ensuring they can operate without overheating. It's essential for applications where heat can impact performance and safety, and these limits help in determining the suitability of a device for various environments.

This rating ensures that when a device is subjected to certain conditions, including ambient temperature variations and operational loads, it will not exceed the designated temperature limit, thereby preventing potential failures or hazards in circuits and systems. Understanding these ratings is crucial for technicians in selecting equipment and ensuring compliance with safety standards in installations.