1N4481US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4481US/TR is a surface mount Zener voltage regulator diode with a nominal breakdown voltage of 47 V and a standard tolerance of ±5%. It operates within a junction temperature range of -65°C to +175°C and features a maximum steady-state power dissipation of 1.5 W at 25°C ambient temperature. The device utilizes a D-5A (MELF) package, measuring approximately 5.08 mm in length and 2.62 mm in width. Electrical characteristics include a maximum dynamic impedance of 50 Ohms at the test current of 5.5 mA and a maximum reverse leakage current of 50 nA.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with internal metallurgical bonds for high reliability.
• Qualified per MIL-PRF-19500/406 standards for military-grade applications.
• Triple-layer passivation provides robust protection against environmental factors.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• High-reliability voltage regulation where failure cannot be tolerated.
• Military and aerospace electronic systems requiring MIL-PRF-19500/406 compliance.
• Circuit protection and reference voltage generation in harsh environments.

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required qualification level, as commercial versions lack military certification. Confirm RoHS compliance status if lead-free termination is mandatory, noting that certain military grades may utilize tin/lead terminations. Ensure the tape and reel packaging aligns with automated assembly requirements by consulting factory specifications for quantity constraints.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, surface-mount Zener diode is required for critical applications. The 1N4481US/TR offers a 47 V regulation point with a 1.5 W power rating in a compact MELF package. Consider the thermal resistance and derating curves for high-temperature operation above 25°C ambient conditions.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 Watt glass Zener diodes. These devices are industry-recognized equivalents to popular JEDEC registered axial-lead series but adapted for surface mount technology. The series covers a broad voltage range from 3.3 V to 200 V with various tolerance options.

Single Zener Diodes Replacement Considerations

JAN1N4481CUS

Single Zener Diodes FAQ

What is the maximum operating junction temperature for the 1N4481US/TR?

The maximum operating junction temperature is +175°C.

Is the 1N4481US/TR radiation hard?

Yes, the device is inherently radiation hard as described in Microsemi MicroNote 050.