1N4743UR

Overview

The Microchip Technology 1N4743UR is a Zener diode voltage regulator designed for through-hole mounting in the DO-41-2 package. It provides a nominal Zener voltage of 12 V with a 5% tolerance and a power dissipation rating of 1 W. The device operates within a temperature range of -65°C to +175°C, featuring a maximum reverse leakage current of 5 µA and a Zener impedance of 14 Ohms at a test current of 17 mA.

Feature Summary

• Provides stable voltage regulation via Zener breakdown characteristics
• Capable of operation across an extended industrial temperature range
• Constructed in a glass passivated axial leaded package

Applications

• Voltage reference circuits
• Overvoltage protection
• Power supply regulation

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number and date codes against official Microchip documentation. Confirm RoHS compliance status as indicated in the specific datasheet revision. Ensure the procurement channel is authorized to guarantee traceability and prevent counterfeit components from entering the supply chain.

Selection Notes

Select this component when a 12 V regulated voltage is required in a through-hole design. The DO-41-2 package suits standard PCB layouts. Verify that the 1 W power dissipation and 17 mA test current align with the circuit's thermal and biasing requirements before finalizing the design.

Part Context

This component belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. These devices are widely used in electronic circuits requiring reliable voltage regulation. The UR suffix typically denotes specific packaging or tape-and-reel configurations within the manufacturer's product line.

Replacement Considerations

Consult the official datasheet for electrically equivalent alternatives. Verify pinout compatibility and thermal performance before substituting.