SMS-1804MS-HT

Overview

The SMS-1804MS-HT is a surface-mount speaker from PUI Audio's SMS series, designed for compact electronic assemblies. It features a square shape with an external width of 18mm and a maximum seated height of 5.90mm. The component operates with a nominal impedance of 4 ohms and a nominal power rating of 1W. Its frequency response spans from 950 Hz to 20 kHz, with a resonant frequency at 950 Hz. The unit delivers a sound pressure level (SPL) of 96 dB and utilizes a polyimide cone material. It offers IP67 ingress protection, ensuring it is dust-tight and waterproof.

Feature Summary

• Surface-mount construction for automated PCB assembly
• IP67 rated for dust and water resistance
• Polyimide cone material for durability

Applications

• Medical devices requiring sealed audio components
• Industrial controls needing robust transducers
• Consumer electronics with space constraints

Procurement Notes

Verify the specific datasheet version for the SMS-1804MS-HT to confirm impedance and power ratings, as some sources indicate variations in the SMS series specifications. Ensure the design accommodates the 18mm square footprint and 5.90mm height. Confirm that the 4-ohm impedance aligns with the amplifier output requirements for optimal performance.

Selection Notes

Select this component when a small form factor and environmental sealing are critical. The 4-ohm impedance suits low-voltage applications. Consider the 96 dB SPL for audible feedback needs. Verify compatibility with SMD/SMT termination styles during layout. Evaluate if the 1W power handling meets the signal drive levels required for the target application.

Part Context

PUI Audio manufactures the SMS series of surface-mount speakers, focusing on innovative audio solutions for various industries. The company specializes in indicators, transducers, and custom audio applications. This part represents their capability to provide compact, reliable audio components for modern electronic designs requiring high integration and environmental resilience.

Replacement Considerations

Check for other SMS series variants with similar dimensions but different impedances. Verify if alternative manufacturers offer IP67-rated surface-mount speakers with comparable SPL and frequency response. Ensure mechanical mounting holes or pad layouts match the replacement component to avoid PCB redesign.