AST0840MFD-4.4TRQ

Overview

The AST0840MFD-4.4TRQ is an electromagnetic speaker transducer manufactured by Mallory Sonalert Products Inc., designed for surface-mount technology (SMT) applications. It operates within an AC voltage range of 3.6 to 5 Vpp and delivers a sound pressure level of 105 dB at a resonant frequency of 4000 Hz. The component features a compact footprint measuring 8.5 mm in length, 8.5 mm in width, and 4 mm in height, with a plastic cone material. It utilizes SMD/SMT termination types for PCB mounting and has a rated current of 140 mA.

Feature Summary

• Electromagnetic transduction mechanism for audio output
• Surface-mount technology (SMT) compatible design
• High acoustic output capability at specified frequency
• Compact rectangular form factor for space-constrained layouts

Applications

• Electronic device status indication
• Alarm systems requiring high-decibel alerts
• Consumer electronics audio signaling
• Industrial control panel indicators

Procurement Notes

Verify the specific ordering suffix and tape/reel packaging configuration when sourcing this component. Confirm that the supplier provides official Mallory Sonalert documentation to ensure authenticity. Check for RoHS compliance status as indicated in the manufacturer's latest specifications. Ensure the procurement channel supports the required surface-mount handling procedures.

Selection Notes

Select this model when a high-intensity acoustic signal is required in a minimal board area. The electromagnetic type offers distinct performance characteristics compared to piezoelectric alternatives. Consider the 140 mA current rating during power supply design. The 4 kHz frequency is suitable for human-audible alerting rather than low-frequency warning tones.

Part Context

This component belongs to the Mallory Sonalert AST series of surface-mounted transducers. The series expands the manufacturer's portfolio of SMT indicators. It serves as a direct replacement for through-hole speakers where board space is limited. The product line focuses on providing reliable audio signaling in modern electronic assemblies.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify mechanical compatibility if substituting with other SMT speakers. Ensure electrical parameters such as voltage and current ratings match the original circuit requirements.