1N4737CE3/TR13

Overview

The Microchip Technology 1N4737CE3/TR13 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 7.5 V and a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and features RoHS-compliant annealed matte-tin plating, denoted by the 'e3' suffix. It is supplied in tape and reel packaging, specified by the 'TR13' suffix.

Feature Summary

• Provides precise voltage regulation with ±2% tolerance for stable reference applications
• Utilizes void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Offers flexible axial-lead mounting terminals suitable for standard through-hole processes
• Ensures moisture classification Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack

Applications

• Voltage regulation circuits requiring stable reference voltages
• Protection against overvoltage conditions in electronic systems
• Clipping and clamping applications in signal processing

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'C' for ±2% tolerance, 'e3' for RoHS compliance, and 'TR13' for tape and reel packaging. Confirm the manufacturer designation as Microchip Technology or its predecessor Microsemi Scottsdale Division. Ensure the component meets JEDEC registration standards for the 1N4737A type number before procurement.

Selection Notes

Select this component when a 7.5 V Zener voltage with high precision (±2%) is required in a 1-watt power dissipation class. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the operating temperature range of -65°C to +150°C for environmental suitability. Verify that the tape and reel format aligns with automated assembly requirements.

Part Context

This part belongs to the popular 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes. The series provides extensive voltage selection from 3.3 to 100 volts. The specific model utilizes a plastic encapsulated construction, which is available in various screening levels and tolerances. The 'e3' suffix indicates RoHS compliance, while the 'TR' suffix denotes tape and reel availability.

Replacement Considerations

Direct substitutes include other 1N4737 variants with matching electrical characteristics. Check for equivalent parts from other manufacturers offering 7.5 V, 1 W, ±2% tolerance in a DO-41 package. Ensure any replacement maintains the same thermal resistance and operating temperature range.