1N4623-1/TR

Overview

The Microchip Technology 1N4623-1/TR is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 4.3 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65°C to +175°C. Key electrical characteristics include a maximum dynamic impedance of 1600 Ohms, a reverse leakage current of 2 µA at 2 V, and a forward voltage of 1.1 V at 200 mA.

Feature Summary

• Hermetically sealed construction using an internal metallurgical bond for high reliability.
• Capable of regulating voltage across broad ranges of current and temperature variations.
• Offers flexible axial-lead mounting terminals suitable for through-hole applications.

Applications

• Voltage regulation in circuits requiring stable reference voltages.
• Protection against overvoltage conditions in sensitive electronic systems.
• Clipping and clamping applications in signal processing circuits.

Procurement Notes

Verify that the specific ordering suffix matches the required RoHS compliance status and packaging format. Confirm the reliability level corresponds to the intended application environment. Ensure the component meets all relevant environmental and export control classifications before finalizing procurement orders.

Selection Notes

Select this component when a 4.3 V reference with ±5% tolerance is required in a through-hole package. Consider the maximum power dissipation limits and thermal derating curves for high-temperature environments. Evaluate the dynamic impedance and noise density specifications against circuit sensitivity requirements.

Part Context

This part belongs to the 1N4614-1 through 1N4627-1 series of 500 mW Zener diodes. These devices are available in various reliability levels including JAN, JANTX, JANTXV, and JANS, qualified per MIL-PRF-19500/435. Commercial versions are also available with RoHS compliance options.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4623 variants. Verify pinout compatibility and ensure equivalent electrical parameters such as Zener voltage, power rating, and package dimensions match the original design requirements.