1N4742A TR PBFREE

Overview

The Central Semiconductor Corp 1N4742A TR PBFREE is a silicon Zener diode designed for voltage regulation. It features a nominal Zener voltage of 12 V with a ±5% tolerance, tested at 21 mA. The device dissipates up to 1.0 W at 50°C and operates within a temperature range of -65°C to +200°C. Packaged in the DO-41 axial leaded format, it exhibits a maximum reverse leakage current of 5.0 µA and a maximum dynamic impedance of 9.0 Ω.

Feature Summary

• Provides stable voltage regulation across industrial and commercial environments
• Engineered for high reliability in computer and entertainment applications
• Features low forward voltage drop characteristics

Applications

• Industrial equipment power supplies
• Commercial electronic systems
• Entertainment system circuitry
• Computer application logic protection

Procurement Notes

Verify that the specific ordering suffix matches the required plating finish. The PBFREE designation indicates lead-free compliant terminals. Confirm package type and testing conditions align with design requirements before finalizing procurement orders.

Selection Notes

Select this component when a 12 V reference point is required in through-hole designs. Ensure the thermal environment allows for 1.0 W dissipation without exceeding the 200°C junction limit. Verify that the 9.0 Ω impedance meets the noise sensitivity constraints of the target circuit.

Part Context

This part belongs to the 1N4728A through 1N4764A series of 1-watt silicon Zener diodes. The series covers a wide voltage range from 3.3 V to 100 V. All devices share identical mechanical outlines and maximum rating profiles while varying in specific electrical parameters like test current and impedance.

Replacement Considerations

No official replacement part numbers are documented by the manufacturer for this specific item.