1N4733CP/TR8

Overview

The Microchip Technology 1N4733CP/TR8 is a silicon planar Zener diode with a nominal voltage of 5.1 V and a power dissipation rating of 1.0 W at 25°C. It features a plastic DO-41 (DO-204AL) package with axial leads, offering a tight voltage tolerance of ±2% indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and includes a maximum dynamic impedance of 7 Ohms at a test current of 49 mA. The 'TR8' suffix designates tape and reel packaging compliant with EIA-296 standards.

Feature Summary

• Provides precise voltage regulation with a tight ±2% tolerance on the nominal Zener voltage.
• Utilizes a void-free transfer molded thermosetting epoxy body for moisture resistance without requiring dry pack storage.
• Offers flexible axial-lead mounting terminals suitable for standard through-hole applications.
• Features nonsensitive characteristics to electrostatic discharge per MIL-STD-750 Method 1020.

Applications

• Voltage regulation in broad operating current and temperature ranges
• Reference voltage sources in electronic circuits
• Overvoltage protection for sensitive components

Procurement Notes

Verify that the ordering suffixes match the required specifications: 'P' indicates plastic construction, 'C' confirms the 2% voltage tolerance, and 'TR8' specifies the tape and reel packaging format. Ensure compatibility with RoHS compliance requirements if applicable, as devices with the 'e3' suffix are available. Confirm lead material options, which include tin-lead or RoHS-compliant annealed matte-tin plating, based on specific manufacturing needs.

Selection Notes

Select this component when a stable 5.1 V reference with high precision is required. The plastic encapsulation provides lower thermal resistance compared to glass-body options. Consider the 1.0 W steady-state power dissipation capability and the -65°C to +150°C operating temperature range for environmental suitability. Verify that the axial lead configuration fits the target PCB layout constraints.

Part Context

This part belongs to the 1N4728AP thru 1N4764AP series of 1.0 Watt Zener Diodes manufactured by Microsemi (now Microchip Technology). The series covers an extensive voltage selection from 3.3 to 100 volts. These devices are JEDEC registered and offer various screening levels and tolerance options to meet diverse industrial and commercial application requirements.

Replacement Considerations

Surface mount equivalents such as SMAJ4733A or MLL4733A are available from the manufacturer. Consult the factory for other surface mount options or alternative manufacturers offering compatible 5.1 V, 1 W Zener diodes in axial packages.