1N4975

Single Zener Diodes Overview

The Microchip Technology 1N4975 is a military-qualified, voidless hermetically sealed 5-watt glass Zener diode. It provides a nominal Zener voltage of 51 V at a test current of 25 mA. The device features a maximum reverse leakage current of 2 µA and a Zener impedance of 27 Ohms at the test current. It operates within a temperature range of -65°C to +175°C with a voltage temperature coefficient of 0.095 %/°C. The component utilizes an axial lead 'E' package and supports a maximum continuous current of 92 mA.

Single Zener Diodes Feature Summary

• Military qualified to MIL-PRF-19500/356 for high-reliability applications
• Voidless hermetically sealed glass construction with internal metallurgical bonds
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace systems
• Military electronic circuits
• Critical voltage regulation in harsh environments

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required military qualification standard (MIL-PRF-19500/356). Confirm the package style corresponds to the axial lead configuration. Ensure the supplier provides appropriate documentation regarding the voidless hermetic seal and metallurgical bond integrity for mission-critical deployments.

Single Zener Diodes Selection Notes

Select this component when a robust 5-watt Zener regulator is required for extreme temperature environments up to 175°C. The 51 V rating suits specific mid-range voltage reference needs. Consider the axial lead format for through-hole mounting requirements where high power dissipation and radiation hardness are mandatory design constraints.

Single Zener Diodes Part Context

This device belongs to the 1N4954 through 1N4996 series of 5-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series is characterized by its industry-standard JEDEC registration and availability in various voltage tolerances. It serves as a foundational component for ruggedized power supply and protection circuits requiring proven long-term stability.

Single Zener Diodes Replacement Considerations

Equivalent parts include JANTX1N4975 and JANTXV1N4975 from Microchip/Microsemi, which share identical electrical specifications but offer different quality screening levels per MIL-PRF-19500/356.