1N4618-1

Single Zener Diodes Overview

The Microchip Technology 1N4618-1 is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 2.7 V at a test current of 250 µA, with a maximum dynamic impedance of 1500 Ω and reverse leakage current of 1.0 µA. The device operates within a junction temperature range of -65 °C to +175 °C and features a temperature coefficient of -0.075 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed internal metallurgical bond for high reliability
• Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS levels
• Low noise density performance suitable for precision regulation

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Radiation-hardened electronic systems
• Precision reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as qualification levels differ. Confirm RoHS compliance status, noting that commercial versions may vary from military-grade specifications. Ensure the ordering suffix matches the desired termination plating and packaging format.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust thermal stability and low noise in harsh environments. The negative temperature coefficient makes it suitable for lower voltage regulation needs where compensation is manageable. Verify power derating requirements against ambient operating conditions to ensure safe operation within the 500 mW limit.

Single Zener Diodes Part Context

This part belongs to the 1N4614-1 through 1N4627-1 series of 500 mZener diodes manufactured by Microchip/Microsemi. These devices are JEDEC registered and designed for axial-lead mounting. The series covers a wide voltage range from 1.8 V to 100 V with various tolerance options.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other 1N4618 variants from different manufacturers meeting the same electrical specifications. For radiation-hardened applications, verify equivalent MIL-PRF-19500/435 qualification levels before substitution.