As of my last update in September 2021, "current-limiting diodes" do not exist as a standard term or component in electronics. It's possible that new components or technologies have emerged since then, but without updated information, I can't provide details on them.
However, I can explain how traditional current-limiting circuits work to protect circuits from overcurrent, which might be relevant to your question.
Overcurrent protection is essential in electronic circuits to prevent damage to components and ensure the system's safety. One common way to achieve this is by using a current-limiting circuit. This circuit is designed to restrict the amount of current flowing through the circuit to a safe level. It generally involves using one or more of the following techniques:
Current-limiting resistors: Placing a resistor in series with the load (component or circuit) will limit the current that can pass through it. The resistor value is chosen such that it allows the desired normal operating current but limits the current beyond a certain threshold.
Fuse: Fuses are passive devices that break the circuit when the current exceeds a specific value. They contain a metal wire or strip that melts when excessive current flows through it, opening the circuit and protecting the components downstream.
Circuit Breaker: Circuit breakers are automatic switches that can open the circuit when they detect an overcurrent condition. They can be reset after tripping, making them reusable protection devices.
Electronic Current Limiters: Some circuits employ semiconductor devices like transistors or operational amplifiers configured to act as current limiters. These devices can sense the current and actively reduce it when it goes beyond a set limit.
Current-limiting ICs: Integrated circuits (ICs) dedicated to current limiting are available that can be added to the circuit to provide precise control over the current threshold.
The specific method used for current limiting depends on the application, the type of circuit, and the level of protection required.
It's important to note that these traditional current-limiting methods provide passive protection and rely on the circuitry's design. If you have come across a new technology or component called "current-limiting diodes" beyond my knowledge cutoff date, I recommend consulting up-to-date electronics resources or product documentation for accurate information on their functionality and applications.