1SMA4749A

Single Zener Diodes Overview

The NextGen Components 1SMA4749A is a surface-mount Zener diode in the DO-214AC (SMA) package. It features a nominal Zener voltage of 24V with a range of 22.8V to 26V. 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 25 Ohms at a test current of 11mA, a reverse leakage current of 5μA at 18V, and an admissible Zener current of 38mA.

Single Zener Diodes Feature Summary

• Glass passivated junction for enhanced stability
• Built-in strain relief design
• Low inductance construction
• High temperature soldering capability

Single Zener Diodes Applications

• Surface mount circuit applications
• Voltage regulation circuits
• General purpose protection

Single Zener Diodes Procurement Notes

Verify the specific part code suffix against the official specification sheet Q1030-1SMA4749AS749A to ensure correct marking codes and packaging configurations. Confirm RoHS III and REACH compliance status directly with the manufacturer documentation before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select this component for designs requiring a 24V reference in a compact SMA footprint. Ensure thermal management accounts for the 1.0W peak pulse rating and derating requirements above 50°C ambient temperature. Verify that the operating environment falls within the specified -55°C to +150°C junction temperature limits.

Single Zener Diodes Part Context

This device belongs to the 1SMA series of SMD Zener diodes manufactured by NextGen Components. It serves as a direct replacement for the MDD/1SMA4749A part number. The component utilizes a molded plastic body with Underwriters Laboratory Flammability 94V-0 rating.

Single Zener Diodes Replacement Considerations

The datasheet identifies MDD/1SMA4749A as the original manufacturer part number for cross-reference purposes.

Single Zener Diodes FAQ

What is the marking code on the case surface?

The standard marking code for the 1SMA4749A is "749A".

Is the device suitable for high-temperature soldering?

Yes, high-temperature soldering is guaranteed at 260°C for 10 seconds at the terminals.