1N4698UR-1

Overview

The Microchip Technology 1N4698UR-1 is a 0.5 W surface mount Zener diode in a hermetically sealed DO-213AA (MELF) package. It provides an 11.0 V nominal Zener voltage with standard ±5% tolerance, tested at 50 µA. Key electrical parameters include a maximum reverse leakage current of 0.05 µA and a maximum DC Zener current of 43.2 mA. The device operates within a junction temperature range of -65°C to +175°C and features internal metallurgical bonding for high reliability.

Feature Summary

• Hermetically sealed glass MELF package with internal metallurgical bond for high reliability.
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.
• Inherently radiation hard construction suitable for harsh environments.
• Minimal capacitance characteristics for signal integrity.

Applications

• Voltage regulation over broad operating current and temperature ranges.
• High-reliability aerospace and defense electronic circuits.
• Radiation-hardened system protection designs.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's part nomenclature to confirm tolerance, RoHS compliance, and screening level. The base model indicates standard commercial specifications; additional codes define MIL-PRF-19500 up-screening or tighter voltage tolerances. Confirm terminal plating options, as tin-lead or matte-tin availability depends on the commercial grade designation. Ensure the required quantity matches tape and reel standards if indicated by the TR suffix.

Selection Notes

Select this component when a hermetically sealed surface mount Zener regulator is required for high-reliability applications. The 11.0 V nominal voltage and low test current make it suitable for precision reference circuits. Consider the DO-213AA package for space-constrained PCB layouts requiring robust thermal and mechanical performance. Verify that the 0.5 W power dissipation rating aligns with the circuit's thermal management capabilities under worst-case ambient conditions.

Part Context

This device belongs to the 1N4678UR-1 through 1N4717UR-1 series of 500 mW surface mount Zener diodes. The series covers a voltage selection from 1.8 to 43 volts, offering standard ±5% tolerance with optional 1% and 2% variants. All devices in this family share the same hermetically sealed glass DO-213AA package and internal metallurgical bond construction, ensuring consistent reliability across the voltage range.

Replacement Considerations

Direct replacements must match the DO-213AA MELF package and 11.0 V Zener voltage. Equivalent parts should offer comparable hermetic sealing and radiation hardness if used in aerospace contexts. Verify that substitute components meet the same 0.5 W power dissipation and -65°C to +175°C junction temperature ratings to ensure circuit compatibility.