1N748A-1

Single Zener Diodes Overview

The Microchip Technology 1N748A-1 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 3.9 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within an extended temperature range from -65°C to +175°C. Packaged in the DO-204AH (DO-35) axial through-hole format, it exhibits a maximum Zener impedance of 20 Ohms and a reverse leakage current of 2 µA at 1 V. This component meets MIL-PRF-19500/127 military qualification standards.

Single Zener Diodes Feature Summary

• Military-grade reliability compliant with MIL-PRF-19500/127 specifications
• Extended thermal stability suitable for harsh environments up to 175°C
• Precision voltage regulation with tight ±5% tolerance

Single Zener Diodes Applications

• Military avionics systems requiring high-reliability voltage references
• Spacecraft electronic subsystems operating under extreme thermal conditions
• Defense communication equipment power management circuits

Single Zener Diodes Procurement Notes

Verify that the specific part number suffix matches the required military qualification standard. Confirm package dimensions against the DO-204AH specification sheet. Ensure environmental compliance documentation aligns with project requirements. Validate supplier authorization for defense-grade components. Check for recent product change notifications affecting material composition or manufacturing sites.

Single Zener Diodes Selection Notes

Select this component when a stable 3.9 V reference is needed in space-constrained through-hole designs. Consider the low leakage current for high-impedance sensing applications. Evaluate the thermal derating curve if operation exceeds 75°C. Compare impedance characteristics against load regulation requirements. Verify lead form compatibility with existing PCB footprints.

Single Zener Diodes Part Context

This device belongs to the 1N748 series of Zener diodes manufactured by Microchip Technology. It serves as a ruggedized alternative to commercial equivalents, offering enhanced durability for critical infrastructure. The series provides standardized voltage levels for regulatory circuits in aerospace and defense sectors.

Single Zener Diodes Replacement Considerations

Direct substitutes include JANTX1N748A-1 and other variants within the 1N748 family sharing identical electrical parameters and military qualifications.