1N4680

Overview

The Microchip Technology 1N4680 is a 500 mW axial-leaded Zener diode housed in a hermetically sealed DO-7 (DO-204AA) glass package. It provides a nominal Zener voltage of 2.2 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features an internal metallurgical bond. Key electrical parameters include a maximum reverse leakage current of 4 µA at 1 V, a forward voltage of 1.1 V at 200 mA, and a maximum DC Zener current of 200 mA.

Feature Summary

• Hermetically sealed glass axial-lead construction with internal metallurgical bonding
• Voltage regulation capability across a broad operating current and temperature range
• Radiation hard design suitable for demanding environments
• ESD non-sensitive per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring stable reference voltages
• Protection against overvoltage transients in sensitive electronics
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific manufacturer source, as historical data indicates Microsemi production while current listings may show Microchip Technology branding. Confirm the package type matches the required DO-7 or DO-35 form factor. Ensure the tolerance requirement aligns with the standard ±5% specification unless a tighter tolerance suffix is explicitly ordered. Check for any specific screening prefixes if military-grade reliability is required.

Selection Notes

Select this component when a low-voltage reference near 2.2 V is needed with high power dissipation capabilities up to 500 mW. The wide operating temperature range supports use in extreme environmental conditions. Consider the thermal resistance characteristics and derating curves if mounting on FR4 substrates without adequate copper pads. Verify that the axial lead configuration fits the mechanical constraints of the target PCB layout.

Part Context

This part belongs to the 1N4678 through 1N4717 series of 0.5 W Zener voltage regulators. The series offers a selection of voltages from 1.8 V to 43 V in standard 5% tolerances. These devices are JEDEC registered and designed for general-purpose voltage regulation tasks where robustness and wide temperature operation are prioritized.

Replacement Considerations

Direct equivalents include other 1N4680 variants from different manufacturers adhering to the same JEDEC specifications. For surface mount requirements, consider the 1N4680UR in the DO-213AA MELF package. DO-35 glass body axial-leaded equivalents are also available from the same product family.