SBM428

Overview

The SBM428 is a piezoelectric buzzer from Mallory Sonalert Products Inc., designed for audible signaling in industrial and commercial applications. It features an internally driven circuit that simplifies integration by requiring only a DC voltage input to generate a continuous tone at 2.9 kHz. The device operates within a voltage range of 4V to 28V, drawing a current between 0.5mA and 3mA. It delivers a sound pressure level of 76 dBA at 28VDC. The unit measures 41.66 mm in diameter with a height of 21.51 mm and utilizes solder lug terminals for panel mounting.

Feature Summary

• Internally driven piezoelectric technology eliminates the need for external oscillators or complex driver circuits.
• Continuous tone operation provides steady auditory alerts suitable for status indication and alarm systems.
• Robust construction supports reliable performance across a wide operating temperature range.

Applications

• Industrial machinery status indicators
• Control panel alarm systems
• Commercial equipment auditory feedback

Procurement Notes

Verify the specific terminal configuration and mounting requirements against your design specifications before ordering. Confirm that the operating voltage aligns with the 4V to 28V DC range to ensure proper function. Check for any updated environmental compliance certifications required for your region. Ensure the panel cutout dimensions match the 41.66 mm diameter specification for correct installation.

Selection Notes

Select this component when a simple, internally driven solution is preferred over externally driven buzzers. It is suitable for designs where space constraints allow for a 41.66 mm diameter form factor. Consider the 76 dBA output level to ensure adequate audibility for the intended environment. Verify that the solder lug termination method is compatible with your assembly process.

Part Context

This part belongs to the Mallory Sonalert product line, known for reliable audio signaling components. The SBM428 represents a standard panel-mount option within their piezoelectric buzzer portfolio. It shares functional similarities with other internally driven models but is distinct in its specific acoustic output and physical dimensions.

Replacement Considerations

Direct substitutes may include other Mallory Sonalert internally driven piezo buzzers with similar voltage and frequency ratings. Cross-referencing with models like the SNP428F requires careful comparison of sound pressure levels and mounting styles. Always verify electrical parameters and physical dimensions before substituting.