CMI-1240-SMT

Overview

The CMI-1240-SMT is a surface-mount audio indicator buzzer manufactured by Same Sky. It operates on a rated voltage of 12 VDC with an operating range of 3VDC to 16VDC. The device produces a sound pressure level of 90 dB at a frequency of 4.0 kHz. Key electrical specifications include a current draw of 18 mA and an internal driving circuit. The physical dimensions are 16.90 mm x 16.90 mm with a maximum seated height of 8.30 mm. It utilizes piezoelectric technology and features solder pad termination for PCB integration.

Feature Summary

• Integrates an internal driving circuit for simplified interface requirements
• Utilizes piezoelectric technology for reliable acoustic output
• Designed for surface-mount assembly via solder pads
• Constructed with PPS housing material for durability

Applications

• Industrial control panel indicators
• Medical equipment status alerts
• Consumer appliance signaling

Procurement Notes

Verify the specific suffix variant, as the base model may have different packaging or tolerance options. Confirm RoHS compliance status through official documentation before procurement. Ensure the selected package type matches the intended manufacturing process. Cross-reference the datasheet for exact mechanical tolerances required by the design.

Selection Notes

Select this component when a compact surface-mount solution is required for high-volume production. The internal driver simplifies schematic design by reducing external component count. Verify that the 90 dB output meets the audible requirements of the target application environment. Check thermal limits against the expected operating temperature range of -30°C to 70°C.

Part Context

This part belongs to the CMI series of audio indicators from Same Sky. The series offers various mounting styles and drive types. This specific model focuses on surface-mount convenience with integrated electronics. It serves as a direct replacement for legacy through-hole buzzers in space-constrained designs.

Replacement Considerations

Check for CUI Devices equivalents if sourcing from former inventory channels. Verify pinout compatibility if replacing non-integrated drivers. Ensure acoustic performance matches system requirements.