1N4733G

Overview

The 1N4733G is a silicon planar power Zener diode manufactured by Taiwan Semiconductor Corporation. It provides a nominal Zener voltage of 5.1 V with a standard tolerance of ±5%. The device operates within a power dissipation rating of 1 W and features a DO-41 glass package. Electrical characteristics include a test current of 49 mA, a maximum dynamic impedance of 7 Ω at the test current, and a leakage current of 10 µA at a reverse voltage of 1 V. Thermal resistance values are specified as 53.5 °C/W junction-to-lead and 100 °C/W junction-to-ambient.

Feature Summary

• Hermetically sealed glass construction for corrosion resistance
• Pure tin plated leads solderable per J-STD-002
• Wide Zener voltage range selection from 3.3V to 56V
• Standard ±5% Zener voltage tolerance

Applications

• Low voltage stabilizers or voltage references
• Adapters
• Lighting applications
• On-board DC/DC converter

Procurement Notes

Verify the specific ordering suffix (e.g., R0G for reel, A0G for ammo box) against the required packaging quantity. Confirm RoHS compliance status and date code markings on the component body. Ensure the DO-41 package dimensions match the target PCB footprint. Check for any lead-free plating specifications if required by assembly processes.

Selection Notes

Select this component when a 5.1 V reference with ±5% accuracy is required in a through-hole DO-41 package. Consider the 1 W power dissipation limit and thermal resistance values for heat management. Verify that the 49 mA test current aligns with the circuit design requirements. Compare leakage current specifications against strict low-power application needs.

Part Context

This part belongs to the 1N4728G–1N4758G series of 1W silicon planar power Zener diodes. The series covers a broad voltage spectrum from 3.3V to 56V. All devices share the same DO-41 hermetically sealed glass case and pure tin plated terminal configuration. The series is designed for general-purpose voltage regulation and reference applications.

Replacement Considerations

Cross-reference with other manufacturers' 1N4733 equivalents in the DO-41 package. Verify matching Zener voltage, power dissipation, and tolerance specifications. Ensure thermal resistance and package dimensions are compatible with existing board layouts.