1N4697 (DO35)

Overview

The Microsemi 1N4697 is a silicon Zener diode housed in a DO-35 glass axial leaded package. It provides a nominal Zener voltage of 10 V with a standard tolerance of 5%. The device supports a maximum steady-state power dissipation of 500 mW at a lead temperature of 75°C, with derating required above this threshold. It operates within a junction and storage temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 1 µA and a test current of 50 µA.

Feature Summary

• Features double slug type construction for enhanced thermal stability and performance consistency under varying operating conditions.
• Utilizes metallurgically bonded construction to ensure robust internal connections and reliability in harsh environments.
• Encased in hermetically sealed glass packaging to protect the silicon junction from moisture and environmental contaminants.

Applications

• Voltage regulation in precision analog circuits requiring stable reference potentials.
• Overvoltage protection stages in sensitive electronic systems.
• Clamping applications in signal processing paths to limit transient spikes.

Procurement Notes

Verify the specific manufacturer source, as the 1N4697 designation is licensed across multiple producers including onsemi and Tak Cheong. Confirm RoHS compliance status, as commercial versions may differ from military-specified variants. Ensure the DO-35 package dimensions match the target PCB layout requirements before finalizing procurement decisions.

Selection Notes

Select this component when a 10 V reference is needed in a compact axial package. Consider the 5% tolerance for general regulation or seek tighter tolerance suffixes if higher accuracy is required. Evaluate the 500 mW power rating against circuit dissipation needs and verify the high-temperature capability suits the operational environment.

Part Context

This part belongs to the broader family of 0.5 W axial-leaded Zener diodes, often referenced by similar numbering schemes across different semiconductor manufacturers. The DO-35 form factor is a standard industry size for low-power discrete components. Variants may exist with different suffixes indicating tolerance levels or specific manufacturing origins.

Replacement Considerations

Direct substitutes include the 1N4697RA2 (Tak Cheong) and 1N4697C (Central Semiconductor). Verify that replacement parts maintain the same DO-35 footprint and 10 V nominal voltage. Check for differences in reverse leakage specifications and maximum operating temperatures to ensure compatibility with existing designs.