1N4752A

Overview

The SMC Diode Solutions 1N4752A is a silicon planar Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 33 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W at ambient temperatures up to 75 °C, derating linearly above this threshold. It utilizes the DO-41 axial leaded package, suitable for through-hole mounting. Key electrical characteristics include a maximum reverse leakage current of 5 µA at 25.1 V and a Zener impedance of 45 Ω at the test current of 7.5 mA. The junction temperature range extends from -65 °C to +175 °C.

Feature Summary

• Provides stable voltage regulation using a silicon planar construction with glass passivation for environmental protection.
• Features a robust DO-41 axial package designed for high-reliability through-hole circuit board mounting.
• Offers precise voltage tolerance of ±5% to ensure accurate reference levels in sensitive electronic circuits.

Applications

• Voltage regulation in DC power supply circuits
• Overvoltage protection for sensitive semiconductor components
• Precision voltage reference sources in measurement equipment

Procurement Notes

Verify the specific manufacturer lot and date code upon receipt, as SMC Diode Solutions products may be sourced from various manufacturing partners under license. Confirm RoHS compliance status and packaging type (reel or cut tape) against the specific purchase order requirements. Ensure storage conditions adhere to moisture sensitivity level guidelines to prevent package damage before soldering.

Selection Notes

Select the 1N4752A when a 33 V regulated rail is required in a through-hole design. Compare thermal resistance values if operating near the 1 W limit in enclosed spaces. Verify that the 45 Ω dynamic impedance meets the noise and stability requirements of the specific application, as lower impedance variants exist for different voltage ranges within the same series.

Part Context

This component belongs to the standard 1N47xxA series of 1 Watt Zener diodes, widely used in industrial and consumer electronics. The 1N4752A specifically targets the 33 V segment of this lineup. It serves as a fundamental discrete semiconductor element for basic circuit protection and biasing tasks across various electronic assemblies.

Replacement Considerations

Direct functional equivalents include the 1N4752A from manufacturers such as Vishay, onsemi, and Micro Commercial Components. Ensure replacement parts match the DO-41 package dimensions and maintain the same 33 V ±5% specification. Verify that any substitute also meets the required 1 W power rating and thermal derating curves.