1N4480/TR

Single Zener Diodes Overview

The Microchip Technology 1N4480/TR is a commercial-grade Zener voltage regulator diode with a nominal breakdown voltage of 43.0 V and a maximum dynamic impedance of 40 Ohms at a test current of 6.0 mA. It features a hermetically sealed voidless glass package with tungsten slugs, rated for a steady-state power dissipation of 1.5 W at a lead temperature of +112 °C. The device operates within a junction and storage temperature range of -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using voidless hard glass with internal metallurgical bonds
• Triple-layer passivation for robust environmental protection
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020
• Inherently radiation hard

Single Zener Diodes Applications

• High-reliability applications where failure cannot be tolerated
• Voltage regulation over broad operating current and temperature ranges
• Military and aerospace electronic circuits

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm RoHS compliance status and tolerance level. The 'TR' suffix indicates tape and reel packaging; ensure this matches the intended automated assembly process. Confirm that the commercial grade version meets all required environmental specifications for the target application environment.

Single Zener Diodes Selection Notes

Select this component when a 43 V reference is required in a high-power axial-lead format. Ensure the design accommodates the 1.5 W power rating and the specified thermal resistance of 42 °C/W from junction to lead. Verify that the 40 Ohm dynamic impedance aligns with the circuit's noise and stability requirements under the expected load conditions.

Single Zener Diodes Part Context

This part belongs to the 1N4460–1N4496 series of industry-recognized Zener voltage regulators. While the base series is qualified to MIL-PRF-19500/406 for JAN, JANTX, JANTXV, and JANS levels, the 1N4480/TR represents the commercial availability of this robust glass-encapsulated technology.

Single Zener Diodes Replacement Considerations

Direct replacements include other manufacturers' 1N4480 equivalents or higher reliability variants such as JANTX1N4480 or JANS1N4480, provided the package dimensions and electrical characteristics remain compatible.