1N4735CPE3/TR8

Overview

The Microchip Technology 1N4735CPE3/TR8 is a silicon 1-watt Zener diode in the 1N4728AP through 1N4764AP series. It features a plastic DO-41 (DO-204AL) package with an e3 suffix indicating RoHS compliance and annealed matte-tin terminals. The 'C' suffix denotes a tight 2% voltage tolerance, while 'TR8' indicates tape and reel packaging per EIA-296 standards. Rated for 1.0 watts power dissipation at 25°C, it operates within a temperature range of -65°C to +150°C. Electrical characteristics include a nominal Zener voltage of 5.1V, a test current of 49mA, and a maximum dynamic impedance of 7 ohms at the test current.

Feature Summary

• Provides precise voltage regulation with a 2% tolerance option via the C suffix designation.
• Utilizes void-free transfer molded thermosetting epoxy body meeting UL94V-0 flammability ratings.
• Offers flexible axial-lead mounting terminals suitable for standard PCB integration.
• Ensures moisture resistance classified as Level 1 without requiring dry pack storage.

Applications

• Voltage regulation circuits requiring stable reference levels
• Overvoltage protection for sensitive electronic components
• Power supply output stabilization

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'P' for plastic case, 'e3' for RoHS compliance, 'C' for 2% tolerance, and 'TR8' for tape and reel quantity. Confirm the manufacturer source is Microsemi or authorized distributor to ensure authenticity. Check datasheet revisions for any updates to mechanical dimensions or electrical limits before finalizing procurement orders.

Selection Notes

Select this component when a 5.1V Zener reference with high precision is needed. The 2% tolerance makes it suitable for applications where tighter voltage stability than standard 5% parts is required. Ensure the circuit design accounts for the 1-watt power rating and thermal derating curves provided in the datasheet. Verify that the axial lead form factor fits the available board space and mounting constraints.

Part Context

This device belongs to the widely used 1N47xx series of 1-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a broad voltage range from 3.3V to 100V. The specific part combines the robust plastic encapsulation of the AP series with the precision of the C tolerance grade, offering a reliable solution for general-purpose regulation tasks in industrial and commercial electronics.

Replacement Considerations

Compatible substitutes include other 1N4735 variants with matching 5.1V nominal voltage and 2% tolerance. Ensure replacement parts maintain the same DO-41 package outline and 1-watt power rating. Verify that alternative manufacturers offer equivalent dynamic impedance and thermal resistance characteristics to guarantee circuit performance parity.