What is the purpose of labeling self-limited power supplies?

Labeling self-limited power supplies primarily serves to specify the maximum current output. This is crucial because self-limiting power supplies are designed to provide a maximum output current that cannot be exceeded under normal operating conditions. By labeling the maximum current output, users can ensure that the power supply is used within its safe operating limits, preventing potential damage to connected components and reducing the risk of overheating or failures.

Having clear specifications on the maximum output helps in system design, allowing engineers and technicians to select appropriate power supplies for their applications. This labeling is particularly important in marine, automotive, and industrial environments where electrical systems must adhere to strict safety standards to prevent hazards.

While labeling does contribute indirectly to safety and indicates manufacturer details or circuit protection, the primary and most critical information conveyed through such labels is the maximum current output. This ensures that users have a clear understanding of the power supply's capabilities and limitations, allowing for informed usage.