1N4624C-1/TR

Overview

The Microchip Technology 1N4624C-1/TR is a single unidirectional silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.7 V with a tight tolerance of ±2%. The device operates in a DO-35 (DO-204AH) glass axial leaded package, suitable for through-hole mounting. Key electrical parameters include a maximum power dissipation of 500 mW, a test current of 250 µA, and a maximum reverse leakage current of 5 µA at 3 V. The unit supports an extended operating temperature range from -65 °C to +175 °C.

Feature Summary

• Provides precise voltage regulation with a narrow ±2% tolerance band
• Engineered for low-level operation at a test current of 250 µA
• Constructed with hermetically sealed glass encapsulation for environmental stability

Applications

• Precision voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in sensitive electronic systems
• Clamping applications in signal conditioning paths

Procurement Notes

Verify the specific suffix configuration when ordering, as variations such as bulk or tape-and-reel packaging may exist within the product family. Confirm that the ±2% tolerance variant aligns with design requirements, as standard commercial versions often carry wider tolerances. Ensure the DO-35 package dimensions match the target PCB footprint constraints before finalizing procurement decisions.

Selection Notes

Select this component when circuit designs demand high voltage accuracy beyond standard commercial grades. The low test current specification makes it suitable for battery-powered or low-power applications where minimal quiescent draw is critical. Consider the extended temperature range if the equipment will operate in harsh industrial or aerospace environments exceeding standard commercial limits.

Part Context

This part belongs to the 1N4624 series of Zener diodes manufactured by Microchip Technology. It represents a specialized, high-precision variant distinguished by its tighter voltage tolerance compared to general-purpose equivalents. The component utilizes established silicon planar technology housed in a traditional glass axial package, ensuring compatibility with legacy through-hole manufacturing processes.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4624 variants, though verification of the ±2% tolerance and 500 mW power rating is essential. Alternative packages such as SOD-80 require careful re-evaluation of thermal and mechanical constraints.