1N4757PE3/TR12

Overview

The Microchip Technology 1N4757PE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP-1N4764AP series, housed in a DO-41 axial package. It provides voltage regulation at a nominal Zener voltage of 51 V with a standard tolerance of ±10%. The device features a maximum dynamic impedance of 95 Ω and a maximum reverse current of 5 µA at a test voltage of 38.8 V. It operates within a temperature range of -65°C to +150°C and includes RoHS compliance indicated by the e3 suffix.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Constructed with void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 51 V reference
• Power supply protection against overvoltage conditions
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix TR12 corresponds to tape and reel packaging as specified in the datasheet. Confirm RoHS compliance status via the e3 suffix designation. Ensure the component matches the JEDEC registered type number 1N4757A specifications for voltage and impedance parameters before integration into production designs.

Selection Notes

Select this component when a 51 V Zener voltage with 10% tolerance is required for axial lead applications. Consider the plastic construction for lower thermal resistance compared to glass-body options. Verify that the 1.0 W power dissipation rating meets the circuit's steady-state and surge current requirements under the expected ambient temperature conditions.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of silicon 1-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers extensive voltage selection from 3.3 to 100 volts. The 'P' suffix indicates plastic encapsulation, while 'e3' denotes RoHS compliant tin plating. These devices are JEDEC registered and available in various screening levels.

Replacement Considerations

Compatible substitutes include other 1N4757A variants with matching electrical characteristics. Surface mount equivalents such as SMAJ4757A or MLL4757A may be considered if footprint changes are acceptable. Verify that any replacement maintains the 51 V Zener voltage and 1 W power dissipation ratings.