1N4733A

Overview

The 1N4733A is a 5.1V, 1W Zener diode manufactured by SMC Diode Solutions in an axial DO-41 glass passivated package. It features a nominal Zener voltage of 5.1V with a maximum impedance of 12 ohms at the test current of 49mA. The device supports a maximum reverse leakage current of 5uA at 4.35V and operates within a junction temperature range of -65°C to +175°C. It provides stable voltage regulation for low-power applications requiring precise reference voltages.

Feature Summary

• Glass passivation ensures long-term stability and environmental resistance
• Axial leaded construction facilitates through-hole mounting on printed circuit boards
• Nominal Zener voltage of 5.1V provides reliable voltage regulation
• Wide operating junction temperature range supports diverse thermal environments

Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Procurement Notes

Verify the specific manufacturer datasheet for the exact electrical tolerances and thermal characteristics before integration. Confirm that the DO-41 package dimensions match your PCB footprint requirements. Ensure the power derating curves align with your expected operating conditions to maintain reliability under varying thermal loads.

Selection Notes

Select this component when a 5.1V regulation point is required with moderate power handling capabilities. Consider the 1W power rating and axial package form factor for standard through-hole designs. Evaluate the 12 ohm impedance value against the noise and regulation sensitivity requirements of the target circuit design.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes, widely used for basic voltage regulation tasks. The 'A' suffix typically denotes tighter tolerance specifications compared to non-suffixed variants. SMC Diode Solutions produces this component using established semiconductor manufacturing processes for consistent performance across production batches.

Replacement Considerations

Equivalent parts include the 1N4733 from other manufacturers offering identical 5.1V, 1W specifications in DO-41 packages. Verify pinout compatibility and ensure thermal management strategies remain consistent when substituting components from different suppliers.