1N4757APE3/TR12

Overview

The Microchip Technology 1N4757APE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, providing voltage regulation with a nominal Zener voltage of 51 V and a standard tolerance of ±5%. It operates within an ambient temperature range of -65°C to +150°C and features a plastic DO-41 (DO-204AL) axial-lead package. The device exhibits a maximum dynamic impedance of 95 Ω at a test current of 5.0 mA, with a maximum reverse leakage current of 5 µA at 38.8 V. It is RoHS compliant and supplied in tape-and-reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with a 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 and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix matches the required specifications, as the 'e3' suffix indicates RoHS compliance and the 'TR12' suffix denotes tape-and-reel packaging. Confirm the manufacturer source, noting that this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the procurement documentation aligns with the specific JEDEC registration and screening levels defined in the official datasheet.

Selection Notes

Select this component when a 51 V Zener voltage with ±5% tolerance is required for power dissipation up to 1.0 watt. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the 95 Ω dynamic impedance and 5 µA reverse leakage characteristics for circuit stability. Verify that the operating environment falls within the specified -65°C to +150°C temperature range and that the axial lead format suits the assembly process.

Part Context

This device belongs to the popular 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series provides a wide selection of voltages from 3.3 to 100 volts. The 'P' suffix designates the plastic encapsulated version, which provides improved thermal performance over glass-body alternatives. These devices are JEDEC registered and available in various military screening levels upon request.

Replacement Considerations

Equivalent parts include other 1N4757A variants such as 1N4757A, 1N4757AP, and 1N4757APE3. Surface mount equivalents like SMAJ4757A or MLL4757A may be used if form factor changes are acceptable. Verify that any substitute maintains the 51 V nominal voltage, 1 W power rating, and compatible package dimensions.