1N4708RL

Overview

The Motorola 1N4708RL is a unidirectional silicon Zener voltage regulator diode designed for general-purpose regulation applications. It operates within the DO-41 axial leaded package, utilizing a hermetically sealed glass construction to ensure environmental stability and reliability. The device provides a nominal Zener voltage of 22V with a power dissipation rating of 0.5W. Key electrical characteristics include a maximum knee impedance of 300 Ω and an operating temperature range spanning from -65 °C to 200 °C. The component features isolated case connections and metallurgically bonded internal structures.

Feature Summary

• Hermetically sealed glass construction for enhanced durability
• Metallurgically bonded die for structural integrity
• Oxide passivated die surface protection

Applications

• General purpose voltage regulation circuits
• Reference voltage sources in electronic systems
• Overvoltage protection stages

Procurement Notes

Verify the specific manufacturer source, as the 1N4708RL designation may originate from multiple semiconductor producers including Motorola or Microsemi. Confirm that the received component matches the DO-41 package dimensions and the 22V Zener voltage specification. Ensure the part number suffix aligns with the required tolerance and packaging format before integration into production designs.

Selection Notes

Select this component when a 22V reference is required in a standard axial leaded form factor. The 0.5W power rating suits low-current regulation tasks. Consider the DO-41 package size constraints and the need for hermetic sealing if the application environment demands high reliability against moisture or contaminants compared to plastic encapsulated alternatives.

Part Context

This component belongs to the broader family of 1N47xx series Zener diodes, which are widely used for voltage clamping and regulation. The 1N4708 variant specifically targets the 22V breakdown region within the standard industrial voltage lineup. These devices are foundational discrete semiconductors often utilized in power supply feedback loops and signal conditioning circuits.

Replacement Considerations

Equivalent parts include the 1N4750A and 1N4750ARL, which share identical 22V specifications and 0.5W ratings. Cross-referencing with other manufacturers' DO-41 packages is necessary to verify pinout compatibility and thermal performance metrics.