1N4742CE3/TR13

Overview

The Microchip Technology 1N4742CE3/TR13 is a silicon 1.0-watt Zener diode in the 1N4728A through 1N4764A series, housed in a plastic DO-41 (DO-204AL) axial lead package. It provides voltage regulation with a nominal Zener voltage of 12 V and a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and features RoHS-compliant annealed matte-tin plating on its terminals. Packaged in tape and reel format per EIA-296 standards, it offers moisture classification Level 1 without requiring dry packing.

Feature Summary

• Provides precise voltage regulation with a ±2% tolerance for stable reference applications
• Utilizes void-free transfer molded thermosetting epoxy body meeting UL94V-0 flammability ratings
• Features flexible axial-lead mounting terminals compatible with standard through-hole processes
• Operates reliably across a wide temperature range from -65°C to +150°C

Applications

• Voltage reference circuits requiring tight tolerance stability
• Power supply overvoltage protection and regulation
• General-purpose voltage clamping in electronic systems

Procurement Notes

Verify that the ordering suffix includes both 'e3' for RoHS compliance and 'TR' for tape and reel packaging. Confirm the 'C' suffix is present to ensure the specific ±2% voltage tolerance variant is received. Check manufacturer documentation for any updates regarding the transition from Microsemi to Microchip Technology production lines.

Selection Notes

Select this component when a 12 V regulated output with high precision is required in an axial package. The ±2% tolerance distinguishes it from standard 5% or 10% variants. Ensure the application supports the 1.0-watt power dissipation limit and consider thermal derating if operating at elevated ambient temperatures above 45°C.

Part Context

This part belongs to the widely used 1N47xx series of 1-watt Zener diodes. The 'e3' suffix denotes RoHS compliance with tin-plated leads, while 'TR' indicates bulk tape and reel shipping. The 'C' suffix specifies the tighter 2% voltage tolerance compared to the standard 'A' suffix (5%) or unmarked (10%) versions in the same series.

Replacement Considerations

Compatible substitutes include other 12 V Zener diodes in the DO-41 package with ±2% tolerance, such as the 1N4742A (5% tolerance) or 1N4742D (1% tolerance). Surface mount equivalents like SMAJ4742A are available but require different mounting considerations.