1N4920A

Overview

The 1N4920A is a single Zener diode manufactured by Microchip Technology, designed for through-hole mounting in the DO-35 (DO-204AH) axial package. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5% and a maximum power dissipation of 500 mW. The device operates within a temperature range of -65°C to +175°C and exhibits a low reverse leakage current of 15 µA at the specified test current of 7.5 mA.

Feature Summary

• Temperature compensated design for stable voltage regulation across wide thermal ranges
• High reliability construction suitable for demanding industrial environments
• Axial leaded package facilitates easy integration into printed circuit boards

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific suffix designation, such as /TR, when ordering to confirm packaging format, as standard parts may differ from reel-packed variants. Confirm RoHS compliance status directly with the manufacturer or authorized distributor, as historical data indicates potential non-compliance for certain production batches. Ensure the procurement channel provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when a precise 19.2 V regulation point is required with moderate power handling capabilities. The DO-35 package offers a compact footprint for space-constrained designs. Evaluate the thermal environment carefully, as the device supports operation up to 175°C, making it suitable for high-temperature industrial applications where standard silicon limits might be exceeded.

Part Context

This part belongs to the 1N49xx series of Zener diodes produced by Microchip Technology, formerly associated with Microsemi. These components are widely utilized in general-purpose electronics for voltage stabilization. The 1N4920A specifically targets applications needing a 19.2 V breakdown voltage, distinguishing it from other series members with different voltage ratings.

Replacement Considerations

Direct substitutes include the 1N4920A/TR variant for reel-packaged requirements. Cross-reference with equivalent 19.2 V Zener diodes from other manufacturers ensuring identical DO-35 package dimensions and 500 mW power rating to maintain mechanical and electrical compatibility.