1SMA4774A

Single Zener Diodes Overview

The NextGen Components 1SMA4774A is a unidirectional surface-mount Zener diode in the DO-214AC (SMA) package. It features a nominal Zener voltage of 260V with a tolerance range of 249V to 271V. The device handles a peak pulse power dissipation of 1.0W and operates within a junction temperature range of -55°C to +150°C. Electrical characteristics include a maximum dynamic impedance of 1Ω at a test current of 2000mA, a reverse leakage current of 1μA at 230V, and an admissible Zener current of 190mA.

Single Zener Diodes Feature Summary

• Glass passivated junction for enhanced stability
• Low inductance design suitable for high-speed circuits
• Built-in strain relief for mechanical robustness
• High temperature soldering capability up to 260°C

Single Zener Diodes Applications

• General SMD applications requiring voltage regulation
• Protection of sensitive electronic circuits from overvoltage
• Reference voltage generation in high-voltage systems

Single Zener Diodes Procurement Notes

Verify the specific part code 1SMA4774AS774A against the official specification sheet Q1030-1SMA4774AS774A to ensure compliance with the stated electrical parameters. Confirm that the component meets RoHS III and REACH requirements as documented by the manufacturer. Cross-reference the marking code '774A' on the device body to validate authenticity and correct voltage rating before integration into production.

Single Zener Diodes Selection Notes

Select this component when a precise 260V reference or protection level is required in a compact SMA footprint. The low dynamic impedance ensures stable performance under varying load conditions. Ensure the application circuit can accommodate the specified peak forward surge current and that thermal derating curves are considered for ambient temperatures exceeding 50°C to maintain reliability.

Single Zener Diodes Part Context

This device belongs to the 1SMA series of SMD Zener diodes manufactured by NextGen Components. The series utilizes a planar die technology housed in a molded plastic body compliant with UL94 V-0 flammability standards. The product line is designed for automated surface-mount assembly processes, offering consistent electrical characteristics across the manufacturing batch.

Single Zener Diodes Replacement Considerations

The datasheet identifies MDD/1SMA4774A as a cross-reference part number. Verify pinout compatibility and exact voltage tolerances before substituting.