1N4483

Single Zener Diodes Overview

The Microchip Technology 1N4483 is a military-qualified, voidless hermetically sealed glass Zener diode with a nominal voltage of 56 V. It operates within a junction temperature range of -65 °C to +175 °C and dissipates up to 1.5 W at a lead temperature of +112 °C. The device features a maximum dynamic impedance of 70 Ohms at the test current of 4.5 mA and a maximum reverse leakage current of 25 µA at 44.8 V. Standard tolerance is ±5%, with tighter options available via suffixes.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using voidless hard glass with tungsten slugs for robust performance in high-reliability environments.
• Military qualification per MIL-PRF-19500/406 across JAN, JANTX, JANTXV, and JANS reliability levels.
• Inherently radiation-hardened design suitable for aerospace and defense applications where failure is not tolerated.

Single Zener Diodes Applications

• Voltage regulation in high-reliability aerospace systems
• Defense electronics requiring radiation hardness
• Critical power supply reference circuits

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as this dictates the manufacturing lot and testing standards. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military grades. Ensure the package type matches your board layout requirements before ordering.

Single Zener Diodes Selection Notes

Select the 1N4483 when a precise 56 V breakdown voltage is needed with strict tolerance limits. Consider the thermal resistance and derating curves for high-power dissipation scenarios. Evaluate the need for tighter tolerances (±2% or ±1%) by checking the appropriate part nomenclature suffixes against standard availability.

Single Zener Diodes Part Context

This component belongs to the 1N4460–1N4496 series of 1.5 W glass Zener diodes. It shares the same physical DO-41 axial-lead package and hermetic sealing technology as its siblings, differing primarily in the specific Zener voltage breakdown point defined by the JEDEC number.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N4483D (±1% tolerance) and 1N4483C (±2% tolerance). Verify that any substitute maintains the same MIL-PRF-19500/406 qualification level and hermetic seal integrity for critical applications.