1N4624UR-1/TR

Overview

The Microchip Technology 1N4624UR-1/TR is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.7 V with a tolerance of ±5%. The device operates in the DO-213AA (SMA) surface-mount package and supports a maximum power dissipation of 500 mW. Key electrical parameters include a maximum reverse leakage current of 5 µA at 3 V, a Zener impedance of 1550 Ω, and a test current of 250 µA. The component is qualified for extended temperature ranges from -65°C to +175°C.

Feature Summary

• Provides stable voltage regulation with low noise characteristics suitable for sensitive circuits.
• Engineered for reliable operation across extreme industrial and military temperature environments.
• Utilizes a compact surface-mount package design for automated assembly integration.

Applications

• Precision voltage reference sources in measurement instrumentation
• Overvoltage protection circuits for sensitive semiconductor inputs
• Biasing networks in low-noise analog signal processing stages

Procurement Notes

Verify the specific suffix UR-1/TR against official Microchip documentation to confirm the SMA surface-mount package and tape-and-reel configuration. Ensure compliance with RoHS directives if required by the target application environment. Cross-reference the JAN prefix variants for radiation-hardened specifications when operating in aerospace or defense contexts.

Selection Notes

Select this component when a 4.7 V regulation point is required in a surface-mount footprint. The 500 mW power rating supports moderate current loads. Verify that the 1550 Ω impedance aligns with the source resistance of the driving circuit to maintain regulation accuracy. Confirm thermal management requirements for high ambient temperatures within the specified range.

Part Context

This part belongs to the 1N4624 series of low-power Zener diodes manufactured by Microchip Technology. The series includes through-hole and surface-mount variants. The UR-1 designation typically indicates a specific package style and testing standard, while TR denotes tape-and-reel packaging for high-volume surface-mount technology production lines.

Replacement Considerations

Direct substitutes include JAN1N4624UR-1 for hermetic military-grade equivalents. Standard commercial alternatives like 1N4624B may differ in package type. Verify pinout compatibility and thermal resistance values before substituting in existing board layouts.