1N4738CE3/TR13

Overview

The Microchip Technology 1N4738CE3/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 8.2 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 on its terminals.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards

Applications

• Voltage reference circuits requiring precise regulation
• Power supply protection against overvoltage conditions
• General-purpose voltage clamping in electronic systems

Procurement Notes

Verify that the specific part number includes the required suffixes for your application requirements. Confirm the manufacturer's current production status and lead times directly with authorized distributors or the manufacturer, as availability may vary. Ensure compliance with relevant environmental directives such as RoHS before finalizing procurement decisions.

Selection Notes

Select this component when a precise 8.2 V regulation point is needed with a tighter tolerance than standard variants. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the axial lead format for through-hole PCB designs where surface mount alternatives are not suitable.

Part Context

This device belongs to the widely used 1N47xx series of 1-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a voltage range from 3.3 V to 100 V. The 'e3' suffix denotes RoHS compliance, while the 'TR13' indicates tape and reel packaging for automated assembly processes.

Replacement Considerations

Compatible replacements include other 1N4738A variants from different manufacturers offering identical electrical specifications and DO-41 packaging. Surface mount equivalents such as SMAJ4738A are available if space constraints require a change in form factor.