1N4733PE3/TR8

Overview

The Microchip Technology 1N4733PE3/TR8 is a silicon planar power Zener diode housed in a plastic DO-41 (DO-204AL) axial leaded package. It provides voltage regulation with a nominal Zener voltage of 5.1 V and a standard tolerance of ±5%. The device dissipates up to 1.0 W at 25°C, featuring a maximum reverse current of 10 µA and a dynamic impedance of 7 Ohms at a test current of 49 mA. It operates within a temperature range of -65°C to +150°C and meets RoHS compliance standards.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Utilizes void-free transfer molded thermosetting epoxy body for moisture resistance
• Features flexible axial-lead mounting terminals compatible with standard through-hole processes

Applications

• General purpose voltage regulation circuits
• Power supply reference voltage generation
• Overvoltage protection stages

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm packaging configuration and material composition. Ensure that the procurement channel sources genuine components directly from authorized distributors or the manufacturer to guarantee authenticity and traceability. Cross-reference the part number with the latest datasheet revisions to confirm compliance with current environmental directives and screening levels.

Selection Notes

Select this component when a 5.1 V reference point is required in a through-hole design. Consider the thermal derating curves if ambient temperatures exceed standard limits. Verify that the circuit's expected current does not exceed the maximum regulator current rating. Evaluate the dynamic impedance specifications against the noise sensitivity requirements of the application.

Part Context

This device belongs to the widely recognized 1N47xx series of 1-watt Zener diodes. The 'P' suffix indicates a plastic encapsulated construction, which offers lower thermal resistance compared to glass-body options. The 'e3' suffix denotes RoHS compliance with annealed matte-tin plating on the terminals. This series is JEDEC registered and serves as a standard solution for low-power voltage regulation tasks.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4733A equivalents in the DO-41 package. For plastic variants specifically, check for parts sharing the same electrical characteristics and mechanical dimensions. Ensure any replacement maintains the required 5% voltage tolerance and 1 W power dissipation rating.