1N4625

Overview

The Microchip Technology 1N4625 is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%. The device handles a maximum power dissipation of 500 mW and operates within an extended temperature range from -65°C to +175°C. Packaged in the DO-7 (DO-204AA) axial through-hole format, it exhibits a maximum Zener impedance of 1500 Ohms and a forward voltage of 1.1 V at 200 mA. Reverse leakage current is specified at 5 µA at 3 V.

Feature Summary

• Hermetically sealed glass axial-leaded construction suitable for harsh environments
• Low noise performance optimized for precision voltage reference circuits
• Extended thermal stability supporting operation up to +175°C

Applications

• Precision voltage regulation in aerospace systems
• Overvoltage protection in military-grade electronics
• Reference voltage generation in high-reliability instrumentation

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number against official Microchip Technology documentation. Confirm that the package type matches the required DO-7 form factor and that the voltage tolerance aligns with circuit design specifications. Ensure compliance with relevant military or industrial qualification standards if applicable to the specific deployment environment.

Selection Notes

Select this component when a stable 5.1 V reference is required in space-constrained through-hole designs. The DO-7 package offers reliable mounting for automated assembly processes. Consider the ±5% tolerance and 1500 Ohm impedance characteristics to ensure compatibility with downstream signal conditioning stages requiring minimal noise interference.

Part Context

This component belongs to the 1N4625 series of low-noise Zener diodes manufactured by Microchip Technology. The series includes variants with tighter tolerances, such as the 1N4625C and 1N4625D, which offer ±2% and ±1% accuracy respectively. These devices are commonly utilized in high-reliability sectors where consistent voltage regulation under extreme thermal conditions is critical.

Replacement Considerations

For equivalent performance with tighter voltage tolerance, consider the 1N4625C (±2%) or 1N4625D (±1%). For surface-mount requirements, the JANS1N4625UR-1 provides similar electrical characteristics in a DO-213AA MELF package.