1N4740CPE3/TR12

Overview

The Microchip Technology 1N4740CPE3/TR12 is a silicon Zener diode with a nominal voltage of 10 V and a tolerance of ±2%. It operates in the DO-41 axial lead package, dissipating up to 1.0 W at 25°C. The device features a maximum dynamic impedance of 7 Ω at a test current of 25 mA and a maximum reverse leakage current of 10 µA. It supports an operating temperature range from -65°C to +150°C and includes RoHS compliance indicated by the e3 suffix.

Feature Summary

• Provides precise voltage regulation with tight ±2% tolerance for stable reference applications
• Utilizes void-free transfer molded epoxy body for moisture resistance without dry pack requirements
• Offers flexible axial-lead mounting terminals compatible with standard through-hole processes

Applications

• Voltage regulation circuits requiring stable DC references
• Overvoltage protection stages in electronic systems
• General-purpose clipping and clamping applications

Procurement Notes

Verify that the ordering suffix matches the required specifications: C indicates 2% tolerance, P denotes plastic construction, e3 confirms RoHS compliance, and TR12 specifies tape and reel packaging. Confirm manufacturer origin as Microsemi or Microchip Technology to ensure alignment with the provided datasheet parameters.

Selection Notes

Select this component when a 10 V Zener reference with high precision is required. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Ensure the application current stays within the specified limits to maintain the ±2% voltage accuracy and manage power dissipation effectively.

Part Context

This part belongs to the 1N4728AP thru 1N4764AP series of 1.0 Watt Zener diodes manufactured by Microsemi Scottsdale Division. The series covers voltages from 3.3 V to 100 V. The specific model utilizes JEDEC registered numbering conventions adapted for modern manufacturing standards.

Replacement Considerations

Compatible substitutes include other 1N4740 variants with matching 10 V, 1 W, and ±2% tolerance ratings. Verify package compatibility (DO-41) and electrical characteristics such as dynamic impedance and leakage current before substitution.