1N4928A/TR

Overview

The 1N4928A/TR is a temperature compensated Zener 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 in the DO-35 (DO-204AH) through-hole package with a power dissipation rating of 500 mW. The component exhibits a voltage temperature coefficient of 0.001 %/°C, ensuring stable reference performance across varying thermal conditions.

Feature Summary

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

Applications

• Precision voltage reference circuits
• Temperature sensitive electronic systems
• Low noise signal conditioning

Procurement Notes

Verify the specific suffix /TR indicates reel packaging when ordering. Confirm RoHS compliance status directly with the manufacturer or authorized distributor as regulatory data may vary by production batch. Ensure the DO-35 package footprint matches the target PCB design requirements before finalizing procurement decisions.

Selection Notes

Select this component when a stable voltage reference with minimal drift over temperature changes is required. The 19.2 V nominal value suits specific biasing needs within the Zener family. Consider the 500 mW power rating for thermal management in the circuit layout. The through-hole DO-35 package dictates mechanical mounting constraints compared to surface mount alternatives.

Part Context

This part belongs to Microchip's Temperature Compensated Zener Diode line, distinct from standard Zener regulators. It shares the DO-35 form factor with other axial leaded diodes but offers superior thermal stability due to its compensation technology. The /TR suffix denotes tape and reel packaging for automated assembly processes.

Replacement Considerations

Direct substitutes include other temperature compensated Zener diodes with similar 19.2 V ratings and DO-35 packages. Verify that replacement parts maintain equivalent low noise characteristics and metallurgical bonding quality to ensure circuit performance consistency.