The voltage range for current-regulating diodes (CLDs), also known as constant current diodes, can vary based on the specific type and design. Let%27s explore the voltage characteristics of different CLDs:

1. Zener Diodes:
- Although primarily used for voltage regulation, Zener diodes can also act as current regulators.
- When operated in the reverse breakdown region, Zener diodes maintain a nearly constant voltage drop, indirectly controlling the current.
- Zener breakdown occurs at a specific reverse voltage, called the Zener voltage (VZ).
- Zener diodes are available with breakdown voltages ranging from a few volts up to several hundred volts ¹.

2. Constant Current Diodes (CCDs):
- CCDs are designed specifically for maintaining a stable current flow.
- Their voltage range depends on the specific model and manufacturer.
- Typical CCDs can handle input voltages from 1V to 100V.
- The current range for CCDs is usually between 5mA to 60mA ².

3. Integrated Circuit (IC) Voltage Regulators:
- Some IC-based voltage regulators, like the LM317, can be configured to provide a constant current output.
- These ICs have a specified voltage range, typically from 1.5V to 2V.
- By connecting external components, the ICs can regulate current within this range ³.

4. Other Passive Components:
- In practical circuits, combinations of resistors, Zener diodes, and other passive components can create simple current regulators.
- These solutions are cost-effective and can handle a wide range of input voltages.

In summary, the voltage range for current-regulating diodes depends on their specific design and intended application. Engineers select the appropriate CLD based on the desired current and voltage requirements. ️<br>
References:
1. [Zener Diode as Voltage Regulator Tutorial](https://www.electronics-tutorials.ws/diode/diode_7.html)
2. [Current Limiting Diodes Information - GlobalSpec](https://www.globalspec.com/learnmore/semiconductors/discrete/diodes/current_limiting_diodes)
3. [Constant current regulation applications for current regulation diodes](https://www.heisener.com/TechnologyDetail/Constant-current-regulation-applications-for-current-regulation-diodes)


(1) Zener Diode as Voltage Regulator Tutorial - Basic Electronics Tutorials .... https://www.electronics-tutorials.ws/diode/diode_7.html.
(2) Current Limiting Diodes Information - GlobalSpec. https://www.globalspec.com/learnmore/semiconductors/discrete/diodes/current_limiting_diodes.
(3) Constant current regulation applications for current regulation diodes .... https://www.heisener.com/TechnologyDetail/Constant-current-regulation-applications-for-current-regulation-diodes.
(4) Constant current diode (current regulating diode) | How it works .... https://www.electricity-magnetism.org/constant-current-diode-current-regulating-diode/.

icDirectory Limited | https://www.icdirectory.com/a/blog/what-is-the-voltage-range-for-current-regulation-diodes.html