1SMA4740-AU_R1_000A1

Single Zener Diodes Overview

The 1SMA4740-AU_R1_000A1 is a surface mount silicon Zener diode from the 1SMA4728-AU series manufactured by Panjit International Inc. It features a nominal Zener voltage of 10V with a tolerance range of 9.5V to 10.5V. The device operates at a maximum power dissipation of 1 Watt and utilizes a JEDEC DO-214AC (SMA) molded plastic package over a passivated junction. Electrical characteristics include a maximum Zener impedance of 7 ohms at an test current of 25mA, and a maximum reverse leakage current of 0.25uA at 7.6V reverse voltage.

Single Zener Diodes Feature Summary

• Built-in strain relief for mechanical stability
• Low inductance design suitable for high-speed switching
• Glass passivated junction for enhanced reliability
• Compliant with Underwriters Laboratory Flammability Classification 94V-O

Single Zener Diodes Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Clamping applications in electronic designs

Single Zener Diodes Procurement Notes

Verify component authenticity against official Panjit datasheets before integration. Confirm AEC-Q101 qualification status matches specific project requirements. Ensure soldering parameters do not exceed 260°C for 10 seconds to prevent thermal damage. Validate marking codes correspond to the 1SMA4740 designation during incoming inspection.

Single Zener Diodes Selection Notes

Select this component for applications requiring precise 10V reference levels within SMA packages. Consider the 7-ohm impedance limit when designing low-noise regulation stages. Evaluate thermal derating curves if operating above 25°C ambient temperatures. Verify compatibility with standard SMA footprint layouts for board space optimization.

Single Zener Diodes Part Context

This part belongs to the 1SMA4728-AU through 1SMA4757-AU series of surface mount Zener diodes. The series covers nominal voltages from 3.3V to 51V, all sharing identical mechanical dimensions and packaging standards. The AU suffix indicates automotive-grade qualification under AEC-Q101 standards, ensuring suitability for demanding automotive electronics environments.

Single Zener Diodes Replacement Considerations

Compatible substitutes within the same series include 1SMA4739-AU and 1SMA4741-AU, provided their respective Zener voltages align with circuit requirements. Cross-brand replacements must match the DO-214AC package, 1W power rating, and 10V nominal specification.