1N4621UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4621UR-1/TR is a silicon unidirectional Zener voltage regulator diode housed in the DO-213AA (MELF) surface-mount package. It provides a nominal Zener voltage of 3.6 V with a standard tolerance of ±5%. The device is rated for a maximum power dissipation of 0.5 W and operates within a junction temperature range of -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass encapsulation designed for high reliability
• Internal metallurgical bond construction for enhanced mechanical stability
• Low test current operation suitable for precision regulation

Single Zener Diodes Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in sensitive electronic systems
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify that the suffix /TR indicates tape-and-reel packaging, distinct from bulk variants. Confirm the specific manufacturer lot traceability and aerospace qualification status if required for mission-critical deployments. Ensure compatibility with automated surface-mount assembly processes.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed, surface-mount Zener diode is required for harsh environments. The 3.6 V rating suits low-voltage reference needs. Consider the DO-213AA footprint constraints and thermal management requirements for 0.5 W dissipation during continuous operation.

Single Zener Diodes Part Context

This part belongs to the 1N46xx series of 0.5 W glass surface mount Zener regulators. It shares the DO-213AA form factor with other military-grade variants but differs in breakdown voltage and tolerance specifications. The /TR suffix denotes reel packaging for high-volume manufacturing integration.

Single Zener Diodes Replacement Considerations

Cross-reference with JANTXV1N4621UR or MSP1N4621UR-1 for equivalent electrical characteristics and hermetic sealing. Verify pinout compatibility and ensure the substitute meets the same environmental screening standards.