1N4742AHB0G

Overview

The Taiwan Semiconductor 1N4742AHB0G is a single-channel silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 12 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within an ambient temperature range of -65°C to +200°C. Packaged in the DO-41 (DO-204AL) axial through-hole case, it exhibits a maximum Zener impedance of 9 Ω at a test current of 21 mA. The component ensures low reverse leakage current, specified as a maximum of 5 µA.

Feature Summary

• Hermetically sealed glass package construction for environmental stability
• Planar Zener design utilizing silicon technology
• Lead-free finish compliant with RoHS standards

Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify the specific suffix HB0G against datasheet requirements to ensure correct impedance and leakage specifications. Confirm active lifecycle status with the manufacturer prior to order placement. Ensure procurement channels provide original packaging documentation to validate authenticity and traceability.

Selection Notes

Select this component for designs requiring a stable 12 V reference with high thermal endurance up to 200°C. The DO-41 package suits through-hole PCB layouts. Verify that the 1 W power rating accommodates the circuit's peak dissipation needs without exceeding thermal limits.

Part Context

This part belongs to the standard 1N47xx series of 1 Watt Zener diodes. It serves as a discrete semiconductor solution for basic voltage clamping and regulation tasks. The DO-41 axial package provides robust mechanical mounting for industrial and commercial electronic assemblies.

Replacement Considerations

Cross-reference with other manufacturers' 1N4742A equivalents. Verify pinout compatibility and ensure replacement parts meet the same 1 W power and 12 V Zener voltage specifications.