1N5521D/TR

Overview

The JAN1N5521D-1/TR is a single Zener diode manufactured by Microchip Technology, designed for through-hole mounting in the DO-204AH (DO-35) axial package. It features a nominal Zener voltage of 4.3 V with a tight tolerance of ±1%. The device operates at a test current of 20 mA and dissipates up to 500 mW of power. Key electrical characteristics include a maximum reverse leakage current of 3 µA and a Zener impedance of 18 ohms. It supports an extended operating temperature range from -65°C to +175°C junction temperature.

Feature Summary

• Provides precise voltage regulation with a 1% tolerance on the 4.3 V breakdown voltage.
• Capable of handling high thermal stress with a maximum junction temperature rating of 175°C.
• Offers low leakage current performance suitable for sensitive circuit applications.

Applications

• Precision voltage reference circuits requiring stable DC levels.
• Overvoltage protection stages in electronic systems.
• Clamping applications within signal processing paths.

Procurement Notes

Verify the specific suffix D-1 against standard commercial variants to ensure compliance with military or high-reliability specifications if required. Confirm that the reel packaging aligns with automated assembly equipment requirements. Cross-reference the manufacturer part number with official Microchip documentation to validate authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when a highly accurate 4.3 V reference is needed alongside robust thermal endurance. The low Zener impedance ensures better regulation under varying load conditions compared to higher impedance alternatives. Ensure the circuit design accommodates the 20 mA test current requirement to maintain specified voltage accuracy during operation.

Part Context

This component belongs to the JAN1N5521 series of Zener diodes produced by Microchip Technology. It is part of a broader family of axial leaded diodes designed for general-purpose and high-reliability applications. The 'TR' suffix indicates tape and reel packaging, distinguishing it from bulk packaged equivalents within the same product line.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include the 1N5521C, 1N5521D, and 1N5521D/TR from Microchip Technology. Verify pinout compatibility and thermal ratings when transitioning between these specific part numbers.