1N4915

Overview

The Microchip Technology 1N4915 is a temperature-compensated Zener diode housed in the DO-35 glass axial package. It provides a nominal reference voltage of 7.5 V with a tolerance of ±20%. The device operates at a test current of 7.5 mA and dissipates up to 0.5 W. It features low noise characteristics suitable for precision applications, with a specified Zener impedance of 25 ohms. The component supports an operating temperature range from -55°C to +100°C.

Feature Summary

• Temperature compensated design for stable voltage reference
• Low noise performance for sensitive circuits
• Glass axial encapsulation for durability

Applications

• Precision voltage reference sources
• Temperature compensation networks
• Low noise signal conditioning

Procurement Notes

Verify the specific suffix (e.g., /TR) against the required packaging format, as standard versions may differ from tape-and-reel options. Confirm RoHS compliance status, as some variants are marked non-RoHS. Ensure the manufacturer designation matches Microchip Technology or its predecessor entities like Microsemi, as part numbers may be shared across acquired portfolios. Check datasheet revisions for updated electrical limits.

Selection Notes

Select this component when a stable 7.5 V reference is required under varying thermal conditions. The low noise specification makes it preferable over standard Zener diodes in analog front-ends. Verify that the 0.5 W power rating and 25-ohm impedance align with the circuit's load requirements. Consider the DO-35 package constraints for PCB layout and thermal management.

Part Context

This component belongs to the family of temperature-compensated Zener diodes, often used as voltage references. It shares the 1N49xx series numbering convention with other low-noise Zener devices. The technology relies on specific doping profiles to achieve a near-zero temperature coefficient around the nominal voltage point, distinguishing it from general-purpose rectifiers or standard breakdown diodes.

Replacement Considerations

Public confirmed substitute part numbers: 1N4915A.