1N4752P/TR12

Overview

The Microchip Technology 1N4752P/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 or DO-204AL package. It provides voltage regulation at a nominal Zener voltage of 33V with a standard tolerance of plus/minus 5%. The device operates within an ambient temperature range of -65°C to +150°C and features a maximum power dissipation of 1.0 watts at 25°C lead temperature. Electrical characteristics include a test current of 7.5 mA, a maximum dynamic impedance of 45 ohms, and a maximum reverse current of 5 µA at a test voltage of 5V.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Moisture classified as Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation in power supply circuits
• Reference voltage generation in electronic systems
• Overvoltage protection for sensitive components

Procurement Notes

Verify that the ordering suffix TR12 corresponds to tape and reel packaging as defined by EIA-296 standards. Confirm the specific manufacturer lineage, as this part number originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure compatibility with RoHS compliance requirements if applicable, noting that RoHS compliant versions utilize an e3 suffix.

Selection Notes

Select this component when a 33V Zener voltage with 5% tolerance is required in a plastic axial-lead package. Consider the lower thermal resistance of the plastic P-suffix construction compared to glass-body options. Evaluate the 1.0-watt power dissipation limit against circuit load requirements and ensure operation remains within the specified thermal resistance parameters for both lead-mounted and PCB-mounted configurations.

Part Context

This component belongs to the JEDEC registered 1N4728A through 1N4764A series of 1.0-watt Zener diodes. The series offers extensive voltage selection ranging from 3.3 to 100 volts. The 'P' suffix designates plastic encapsulation, while the 'TR' suffix indicates tape and reel packaging. This family allows for various military screening levels and surface mount equivalents depending on prefix and suffix modifications.

Replacement Considerations

Surface mount equivalents are available as SMAJ4752A and MLL4752A. Glass-body alternatives exist under the same JEDEC numbering with a G suffix. Verify pinout compatibility and thermal performance when substituting with devices from other manufacturers offering similar 1W Zener specifications.