1N4740APE3/TR8

Overview

The Microchip Technology 1N4740APE3/TR8 is a silicon 1.0-watt Zener diode housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 10 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C, featuring a maximum reverse current of 10 µA at the test voltage and a dynamic impedance of 7 Ohms at the specified test current of 25 mA.

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 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 circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify that the ordering suffix TR8 corresponds to the tape and reel packaging configuration as defined by the manufacturer's specific part numbering system. Confirm RoHS compliance status associated with the e3 suffix directly from official documentation before procurement. Ensure the component meets the required JEDEC registration standards for the intended application environment.

Selection Notes

Select this component when a 10 V regulation point with 5% tolerance is required in a 1-watt power dissipation class. Consider the plastic DO-41 package for its lower thermal resistance compared to glass-body options. Verify that the operating temperature range of -65°C to +150°C aligns with the environmental conditions of the target design.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of silicon Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers an extensive voltage selection from 3.3 to 100 volts. The 'P' suffix indicates plastic construction, while the 'e3' suffix denotes RoHS compliant devices with annealed matte-tin plating.

Replacement Considerations

Surface mount equivalents are available as SMAJ4740A or MLL4742A. Other manufacturers may offer direct replacements within the 1N4740A series, but electrical characteristics such as dynamic impedance and leakage current should be verified against the original datasheet specifications.