1N4751ATR

Overview

The Fairchild Semiconductor 1N4751ATR is a single silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 30 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and utilizes the DO-204AL (DO-41) axial through-hole package. Key electrical characteristics include a maximum dynamic impedance of 40 Ω at the test current, a reverse leakage current of 5 µA at 22.8 V, and an operating temperature range spanning from -65°C to 200°C.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Constructed using silicon planar technology for reliable performance
• Encased in a hermetic glass package suitable for high-reliability environments

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in electronic systems
• General-purpose voltage regulation tasks

Procurement Notes

Verify that the specific part number matches the required package style and manufacturer specifications. Confirm compliance requirements such as RoHS status if applicable to the target assembly. Ensure the supplier provides valid traceability documentation for the semiconductor components. Cross-reference the datasheet parameters against the design constraints before finalizing the procurement order.

Selection Notes

Select this component when a 30 V regulation point is required within a 1 W power budget. The DO-41 package facilitates standard through-hole mounting techniques. Consider the thermal management capabilities of the PCB layout given the 200°C maximum junction temperature rating. Evaluate the 40 Ω dynamic impedance to ensure it meets the noise and stability requirements of the specific circuit application.

Part Context

This component belongs to the widely recognized 1N47xx series of 1 Watt Zener diodes. These devices are standardized JEDEC registered parts, ensuring interchangeability across various manufacturers. The series covers a broad spectrum of voltage ratings from 3.3 V to 100 V, making it a fundamental building block for discrete semiconductor designs requiring simple, robust voltage clamping or referencing.

Replacement Considerations

Equivalent parts include the onsemi 1N4751ATR and Microsemi MX1N4751APTR. Verify pinout compatibility and package dimensions before substitution. Ensure the replacement device meets or exceeds the original 1 W power rating and 30 V Zener voltage specification.