1N4930/TR

Overview

The 1N4930/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 operates in the DO-204AH (DO-35) through-hole package and dissipates up to 500 mW. Key electrical parameters include a Zener impedance of 36 Ohms, a reverse leakage current of 15 uA, and a voltage temperature coefficient of 0.005 %/°C. The operating junction temperature range spans from -65°C to +175°C.

Feature Summary

• Temperature compensated design for stable voltage regulation across varying thermal conditions
• High reliability construction suitable for precision analog applications
• Through-hole mounting configuration for standard PCB integration

Applications

• Precision voltage reference circuits requiring low temperature drift
• Overvoltage protection in sensitive electronic systems
• Voltage clamping in analog signal processing paths

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging when ordering. Confirm RoHS compliance status as some listings indicate non-RoHS variants. Ensure the manufacturer is identified as Microchip Technology, noting its acquisition of Micrel which originally produced this line. Cross-reference datasheets for exact thermal and electrical limits before finalizing procurement specifications.

Selection Notes

Select this component when a stable 19.2 V reference is required with minimal temperature dependence. The low voltage temperature coefficient makes it superior to standard Zener diodes for precision applications. Consider the DO-35 package size for space-constrained through-hole designs. Verify that the 500 mW power dissipation rating meets the circuit's thermal requirements under worst-case operating conditions.

Part Context

This part belongs to Microchip's portfolio of single Zener diodes, specifically the temperature-compensated series. Originally developed by Micrel, these components are now managed by Microchip Technology. The 1N4930 variant provides a specific 19.2 V breakdown voltage optimized for stability rather than just raw regulation capability.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official Microchip cross-reference guides or contact technical support for verified equivalents.