1N4746A TR PBFREE

Overview

The Central Semiconductor Corp 1N4746A TR PBFREE is a silicon Zener diode designed for voltage regulation. It features an 18 V nominal Zener voltage with a ±5% tolerance and a maximum power dissipation of 1.0 W at 50°C. The device operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum Zener impedance of 20 Ω, a maximum reverse current of 5.0 μA, and a forward voltage of 1.2 V maximum at 200 mA. It utilizes the DO-41 axial through-hole package.

Feature Summary

• Provides stable voltage regulation using silicon Zener technology
• Designed for high reliability in industrial and commercial applications
• Capable of operating across a wide temperature range from -65°C to +200°C

Applications

• Industrial equipment voltage regulation
• Commercial circuit protection
• Entertainment system power management
• Computer application voltage stabilization

Procurement Notes

Verify that the ordering suffix PBFREE confirms lead-free plating as specified by the manufacturer. Confirm the package type matches the required DO-41 form factor for your assembly process. Ensure the component meets RoHS compliance standards if required by your project specifications. Cross-reference the part number with official distributor catalogs to validate current availability status before finalizing procurement plans.

Selection Notes

Select this component when a precise 18 V reference point is required for low-power circuits. The DO-41 package facilitates easy through-hole mounting on standard printed circuit boards. Consider the 1.0 W power rating to ensure adequate thermal headroom during continuous operation. Verify that the 5% voltage tolerance aligns with the precision requirements of the target design application.

Part Context

This component belongs to the 1N4728A through 1N4764A series of 1.0 Watt silicon Zener diodes manufactured by Central Semiconductor Corp. The series covers a broad voltage range from 3.3 V to 100 V with consistent 5% tolerance across all variants. These devices are engineered specifically for robust performance in demanding electronic environments requiring reliable voltage clamping or regulation.

Replacement Considerations

Official parameter-equivalent substitutes include 1N4746A from onsemi, Microchip Technology, and Nexperia USA Inc.