JAN1N4481DUS

Single Zener Diodes Overview

The JAN1N4481DUS is a surface mount Zener voltage regulator manufactured by Microchip Technology. It operates within the 1N4460US–1N4496US series and is qualified to MIL-PRF-19500/406 standards. The device features a D-5A (MELF) package with a nominal Zener voltage of 47 V, a test current of 5.5 mA, and a maximum dynamic impedance of 50 Ohms at IZT. It provides a steady-state power dissipation of 1.5 W at 25°C ambient temperature, with a junction-to-end cap thermal resistance of 20°C/W. The component supports a junction and storage temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with internal metallurgical bonds for high reliability.
• Triple-layer passivation and robust physical design suitable for environments where failure cannot be tolerated.
• Inherently radiation hard characteristics as defined in Microsemi MicroNote 050.
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.

Single Zener Diodes Applications

• High-reliability military and aerospace electronic systems
• Voltage regulation circuits requiring broad operating current stability
• Radiation-hardened circuit protection applications

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required tolerance level and RoHS compliance status. Confirm the package type corresponds to the D-5A MELF surface mount configuration. Ensure the procurement documentation references the correct MIL-PRF-19500/406 qualification level appropriate for the intended operational environment.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for critical applications. The 47 V nominal rating and 1.5 W power dissipation define the electrical limits. Consider the D-5A package dimensions for PCB layout constraints. Verify that the operating temperature range aligns with the specified -65°C to +175°C junction capability.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of surface mount Zener diodes. These devices serve as industry-standard replacements for axial leaded equivalents while offering superior mounting density. The series covers a wide voltage range from 3.3 V to 200 V, providing consistent performance across various military-grade reliability levels including JAN, JANTX, JANTXV, and JANS.

Single Zener Diodes Replacement Considerations

Direct surface mount equivalents are available within the same 1N44xxUS series family. Axial leaded versions such as the 1N4481 exist but require different mechanical integration. Verify pinout polarity and thermal management requirements when substituting components from different manufacturers or package types.