1N4926A

Overview

The Microchip Technology 1N4926A is a single Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500 mW at specified ambient temperatures. It utilizes a DO-204AH (DO-35) axial leaded package, suitable for through-hole mounting. The component operates within a junction temperature range of -55°C to +100°C. Electrical characteristics include a reverse current of 15 µA at the rated voltage. The Zener impedance is defined under specific test conditions involving superimposed AC current.

Feature Summary

• Provides stable voltage regulation with a nominal 19.2 V breakdown voltage
• Constructed in a standard DO-35 axial glass passivated package for reliable through-hole integration
• Rated for 500 mW power dissipation across an extended industrial temperature range

Applications

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

Procurement Notes

Verify the specific ordering suffix when purchasing, as variants such as 1N4926A/TR exist which indicate tape and reel packaging rather than bulk or individual units. Confirm the manufacturer designation, as historical production may involve Microsemi Corporation prior to acquisition by Microchip Technology. Ensure the package type matches the intended PCB footprint, specifically the DO-35 axial form factor. Cross-reference datasheets from authorized distributors to confirm current availability and exact electrical tolerances for the specific batch.

Selection Notes

Select this component when a fixed 19.2 V regulation point is required in low-power analog designs. The DO-35 package offers a compact solution for space-constrained through-hole layouts. Consider the ±5% tolerance if tighter voltage precision is not critical for the application. Evaluate the 500 mW power rating against expected thermal loads to ensure operation remains within safe junction temperature limits during continuous duty cycles.

Part Context

The 1N4926A belongs to the broader family of 1N49xx series Zener diodes manufactured by Microchip Technology. This series encompasses various voltage ratings optimized for general-purpose regulation tasks. The component represents a continuation of legacy specifications originally established by Microsemi Corporation. These devices are widely utilized in consumer electronics and industrial control systems where cost-effective voltage stabilization is necessary.

Replacement Considerations

Direct substitutes must match the 19.2 V Zener voltage, 500 mW power rating, and DO-35 package. Verify compatibility with equivalent part numbers from other manufacturers offering identical electrical characteristics and physical dimensions.