1N4757CPE3/TR12

Overview

The Microchip Technology 1N4757CPE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a DO-41 (DO-204AL) plastic axial-lead package. It provides voltage regulation with a nominal Zener voltage of 51 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 compliance via the 'e3' suffix. Packaged in tape and reel format per EIA-296 standards as denoted by the 'TR12' suffix, it offers flexible mounting terminals and nonsensitive ESD characteristics.

Feature Summary

• Provides precise voltage regulation with a standard ±2% tolerance on nominal Zener voltage
• Features a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Offers flexible axial-lead mounting terminals suitable for various board configurations
• Includes RoHS compliant annealed matte-Tin plating solderable per MIL-STD-750

Applications

• Voltage regulation over broad operating current and temperature ranges
• High density circuit designs requiring low parasitic effects
• Applications necessitating nonsensitive ESD protection per MIL-STD-750 Method 1020

Procurement Notes

Verify that the ordering suffixes align with specific requirements: 'P' indicates plastic construction, 'C' denotes the ±2% voltage tolerance, 'e3' confirms RoHS compliance, and 'TR12' specifies the tape and reel packaging format. Ensure compatibility with JEDEC registered part numbers and confirm moisture classification Level 1 status which requires no dry pack handling.

Selection Notes

Select this component when a 51 V reference with high precision is required in an axial-lead form factor. The plastic encapsulation offers lower thermal resistance compared to glass-body options. Consider the ±2% tolerance for applications demanding tighter voltage stability than standard 5% or 10% variants. Verify power dissipation limits against ambient temperature conditions using derating curves.

Part Context

This device belongs to the popular 1N4728A through 1N4764A series of 1.0 watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a voltage selection from 3.3 to 100 volts. The specific part utilizes the plastic molded variant, which provides improved thermal performance over glass equivalents while maintaining JEDEC registration standards for interchangeability.

Replacement Considerations

Equivalent parts include other manufacturers' 1N4757A devices with matching 51 V ratings and ±2% tolerances. Surface mount equivalents such as SMAJ4757A or MLL4757A are available but require different footprint considerations. Military screening levels like JAN or JANTX are accessible via specific prefix identifiers if higher reliability is needed.