1N4740PE3/TR12

Overview

The Microchip Technology 1N4740PE3/TR12 is a silicon 1.0-watt Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 10 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and utilizes a DO-41 axial lead package. Electrical characteristics include a maximum reverse current of 10 µA at the test voltage, a dynamic impedance of 7 Ohms at the specified test current, and a forward voltage of 1.2 V maximum at 200 mA.

Feature Summary

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

Applications

• General purpose voltage regulation circuits
• Power supply reference voltage generation
• Overvoltage protection in electronic systems

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status via the e3 suffix designation. Ensure ordering quantities align with tape and reel packaging requirements specified in the documentation. Validate that the specific lot matches the required screening levels if military variants are needed.

Selection Notes

Select this component when a 10 V regulation point is required with 5% tolerance accuracy. Consider the 1 W power dissipation capability and thermal resistance values for heat management. Evaluate the DO-41 package dimensions for PCB layout compatibility. Compare dynamic impedance and leakage current specifications against circuit sensitivity requirements.

Part Context

This part belongs to the 1N4728AP thru 1N4764AP series of plastic encapsulated 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 'e3' denotes RoHS compliant annealed matte-Tin plating. The 'TR' suffix specifies tape and reel packaging.

Replacement Considerations

Consult factory for surface mount equivalents such as SMAJ4740A or MLL4740A. Verify compatibility with glass-body options designated by the G suffix if lower thermal resistance is not critical.