1N4481D

Single Zener Diodes Overview

The Microchip Technology 1N4481D is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 47 V with a tolerance of ±5%. The device operates in the DO-41 axial through-hole package and supports a maximum power dissipation of 1.5 W. Key electrical characteristics include a maximum reverse leakage current of 2 µA at 44.8 V, a Zener impedance of 70 Ohms, and a forward voltage of 1.5 V at 1 A. The component is qualified to MIL-PRF-19500/406 standards and functions within a junction temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Military-grade qualification compliant with MIL-PRF-19500/406 standards
• Robust thermal performance supporting operation up to 175°C junction temperature
• Low reverse leakage current ensuring stable regulation under high impedance conditions

Single Zener Diodes Applications

• Precision voltage reference circuits in aerospace systems
• Overvoltage protection stages in military-grade electronic equipment
• Voltage clamping applications requiring high reliability

Single Zener Diodes Procurement Notes

Verify that the specific order includes the 'D' suffix designation, which indicates the axial DO-41 through-hole package variant. Confirm compliance requirements against MIL-PRF-19500/406 if military specifications are mandatory for the project. Ensure the procurement documentation explicitly states the 1.5 W power rating and 47 V nominal voltage to distinguish it from surface mount or different voltage variants within the same series.

Single Zener Diodes Selection Notes

Select this component when a through-hole axial package is required for mechanical stability or existing board layout constraints. The 1.5 W power rating allows for higher current handling compared to smaller SMD packages. Consider the 70 Ohm impedance for applications where lower dynamic resistance is not critical, and verify that the 47 V breakdown voltage aligns precisely with the circuit's regulation needs.

Single Zener Diodes Part Context

This part belongs to the 1N4481 series of Zener diodes manufactured by Microchip Technology. The series offers various voltage ratings and packaging options, including surface mount and through-hole configurations. The 1N4481D specifically denotes the 47 V version in the traditional DO-41 axial leaded format, maintaining compatibility with legacy designs while providing modern manufacturing quality controls.

Single Zener Diodes Replacement Considerations

The 1N4481D is functionally equivalent to the standard commercial grade 1N4481. For direct replacement in non-military contexts, the 1N4481 may be used if environmental qualifications are not required.