1N4733A TR PBFREE

Overview

The Central Semiconductor Corp 1N4733A TR PBFREE is a silicon Zener diode with a nominal voltage of 5.1 V and a tolerance of ±5%. It operates in the DO-41 axial leaded package and dissipates up to 1.0 W at 50°C ambient temperature. The device features a maximum reverse current of 10 µA at 4.8 V, a maximum DC test current of 196 mA, and a maximum dynamic impedance of 7 Ω at the test current of 49 mA.

Feature Summary

• Provides stable voltage regulation within a tight ±5% tolerance band for precision circuit applications.
• Engineered with a robust glass-sealed DO-41 case capable of withstanding high thermal stress.
• Designed for reliable operation across an extended industrial temperature range from -65°C to +200°C.

Applications

• Industrial control systems requiring precise voltage reference points.
• Commercial equipment power supply circuits for overvoltage protection.
• Entertainment electronics utilizing regulated DC power rails.
• Computer peripheral interfaces needing stable bias voltages.

Procurement Notes

Verify that the specific ordering suffix matches the required plating configuration, as standard variants are Pb-free while others may be Tin/Lead plated. Confirm the package type corresponds to the DO-41 axial lead style rather than surface mount alternatives. Ensure the procurement documentation explicitly references the 1N4733A designation to avoid confusion with similar series members.

Selection Notes

Select this component when a 5.1 V regulation point is required with low leakage characteristics. The DO-41 package facilitates through-hole mounting on standard PCB layouts. Consider the 1.0 W power dissipation capability for thermal management in enclosed environments. Verify that the operating temperature range aligns with the specific environmental conditions of the target application.

Part Context

This part belongs to the 1N4728A through 1N4764A series of 1-watt silicon Zener diodes manufactured by Central Semiconductor. The series covers a wide voltage range from 3.3 V to 100 V, all sharing the same mechanical outline and general electrical testing standards defined in the official datasheet.

Replacement Considerations

No direct replacement part numbers are listed in the manufacturer's public notices for this specific item. Check for discontinued status updates regarding the broader 1N47xx series, as some lower-voltage variants have been transitioned to End of Life status without immediate substitutes.