1SMA4742-GT3

Single Zener Diodes Overview

The 1SMA4742-GT3 is a surface-mount Zener diode manufactured by SMC Diode Solutions, designed for voltage regulation and protection applications. It features a nominal Zener voltage of 12 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a junction temperature range of -65°C to 150°C. Electrical characteristics include a maximum dynamic impedance (Zzt) of 9 Ohms and a reverse leakage current of 5 µA at 9.1 V. The forward voltage is specified as 1.2 V at a forward current of 200 mA. It is housed in the DO-214AC (SMA) package.

Single Zener Diodes Feature Summary

• Glass passivated junction construction for enhanced reliability
• Built-in strain relief mechanism suitable for automated placement
• Low inductance design optimized for high-speed switching

Single Zener Diodes Applications

• Voltage regulation in electronic circuits
• Protection against overvoltage transients
• Reference voltage generation in power supplies

Single Zener Diodes Procurement Notes

Verify the specific suffix GT3 against manufacturer documentation to confirm compliance with RoHS directives and halogen-free status. Ensure the ordering part number matches the exact electrical specifications required for the target application. Cross-reference datasheets from authorized distributors to validate package dimensions and thermal characteristics before finalizing procurement decisions.

Single Zener Diodes Selection Notes

Select this component when a 12 V Zener reference is required in a compact SMA footprint. Consider the 1 W power rating and low dynamic impedance for stable regulation under varying load conditions. Evaluate the operating temperature range to ensure suitability for environments ranging from -65°C to 150°C. Confirm compatibility with surface-mount assembly processes due to the DO-214AC package type.

Single Zener Diodes Part Context

This component belongs to the 1SMA series of surface-mount silicon Zener diodes produced by SMC Diode Solutions. The series offers a wide range of Zener voltages from 3.3 V to 330 V in the DO-214AC package. These devices are engineered for general-purpose voltage regulation and transient suppression in consumer electronics and industrial equipment requiring reliable surface-mount solutions.

Single Zener Diodes Replacement Considerations

Compatible substitutes include the 1SMA4742A from Jingdao Microelectronics and the 1SMA4742HR3G from Taiwan Semiconductor. Verify that alternative parts match the 12 V nominal voltage, 1 W power rating, and DO-214AC package dimensions to ensure mechanical and electrical interchangeability.