1N4928A

Overview

The 1N4928A is a temperature compensated Zener reference diode manufactured by Microchip Technology. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device is designed for low noise applications and utilizes metallurgically bonded double plug construction. It operates within a temperature range of -55°C to 100°C and is available in the DO-204AH (DO-35) axial through-hole package.

Feature Summary

• Temperature compensated design for stable reference voltage
• Low noise performance suitable for precision circuits
• Metallurgically bonded double plug construction

Applications

• Precision voltage reference circuits
• Temperature compensated oscillator circuits
• Low noise power supply regulation

Procurement Notes

Verify RoHS compliance status as some listings indicate non-compliance. Confirm package type DO-204AH availability. Check manufacturer datasheet for specific impedance test conditions. Ensure lead-free status matches project requirements. Validate supplier authenticity for Microchip Technology components.

Selection Notes

Select this component when a stable 19.2 V reference is required with minimal temperature drift. The low noise characteristic makes it suitable for sensitive analog applications. Consider the axial DO-35 package for through-hole mounting constraints. Verify that the ±5% tolerance meets circuit accuracy specifications.

Part Context

This part belongs to Microchip's family of single Zener diodes. It is historically associated with Microsemi Corporation before acquisition. The DO-7 designation refers to the physical package style. It serves as a specialized reference element rather than a standard rectifier or protection diode.

Replacement Considerations

Check for equivalent temperature compensated Zener diodes with 19.2 V nominal voltage. Verify pinout compatibility for DO-35 packages. Ensure noise specifications and impedance characteristics match original design requirements.