1N4893

Overview

The Microsemi Corporation 1N4893 is a temperature-compensated Zener reference diode designed for high-precision voltage regulation applications. It features a nominal Zener voltage of 6.35 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 400 mW and exhibits a maximum impedance (Zzt) of 10 Ohms. Manufactured in a DO-7 through-hole package, this component provides ultra-stable performance across varying thermal conditions, making it suitable for critical reference circuits requiring minimal drift.

Feature Summary

• Ultra-stable temperature compensation ensures consistent voltage reference performance under thermal variations
• Precision Zener voltage specification supports high-accuracy analog circuit requirements
• Through-hole DO-7 packaging facilitates standard PCB integration

Applications

• Precision voltage reference sources
• Temperature-compensated regulator circuits
• High-stability analog signal conditioning

Procurement Notes

Verify the manufacturer designation as Microsemi Corporation or its successor entities during sourcing. Confirm the package type is DO-7 and the Zener voltage is exactly 6.35 V. Ensure the datasheet specifies the ±5% tolerance and 400 mW power rating to match design requirements. Cross-reference part numbers carefully due to potential corporate restructuring history affecting labeling.

Selection Notes

Select this component when a stable, low-drift voltage reference is required in through-hole designs. The 6.35 V output is optimal for biasing applications needing precise potential levels. Consider the 10 Ohm impedance limit for dynamic load changes. Verify that the 400 mW power rating accommodates the expected current draw without exceeding thermal limits in the final assembly environment.

Part Context

This component belongs to the family of temperature-compensated Zener reference diodes. Unlike standard Zener diodes, these utilize specific doping profiles to minimize voltage drift over temperature ranges. The 1N4893 specifically targets applications where stability is more critical than raw breakdown voltage magnitude, serving as a benchmark for precision analog references in industrial and instrumentation contexts.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with equivalent temperature-compensated Zener diodes from other manufacturers based on matching 6.35 V nominal voltage, ±5% tolerance, and 400 mW power rating specifications before substitution.