CMI-1275C-050

Overview

The CMI-1275C-050 is a magnetic audio indicator buzzer manufactured by Same Sky. It operates at a rated voltage of 5 VDC with a current draw of 30 mA. The device produces a sound pressure level of 83 dBA at a distance of 10 cm, with a resonant frequency of 3.1 kHz. It features an internally driven circuit and utilizes through-hole PC pin termination. The physical dimensions are 12.0 mm in diameter.

Feature Summary

• Internally driven electromagnetic design for simplified interface requirements
• Through-hole mounting configuration with PC pins for standard PCB integration
• Magnetic transducer technology for reliable acoustic output

Applications

• General purpose electronic equipment status indication
• Consumer appliance audible alerts
• Industrial control panel signaling

Procurement Notes

Verify the specific suffix and voltage rating against the target application schematic to ensure compatibility with the 5 VDC supply rail. Confirm that the through-hole footprint matches the PCB layout constraints. Check RoHS compliance documentation if environmental regulations apply to the final assembly. Ensure the driving circuit can handle the 30 mA peak current requirement without exceeding component limits.

Selection Notes

Select this component when a low-profile, internally driven buzzer is required for 5 VDC systems. The 12 mm diameter offers a balance between acoustic output and board space. Consider the 83 dBA sensitivity for environments requiring moderate volume levels. The through-hole construction provides mechanical stability compared to surface-mount alternatives in high-vibration applications.

Part Context

This part belongs to the CMI series of magnetic buzzers from Same Sky. The series includes various voltage ratings and form factors designed for general audio indication. The CMI-1275C-050 specifically addresses the common 5 V logic system requirement found in microcontroller-based designs and portable electronics.

Replacement Considerations

Direct substitutes within the Same Sky CMI series include models with identical 12 mm dimensions and 5 VDC operation, such as the CMI-1275C-050 variants. Cross-manufacturer replacements must match the 30 mA current draw, 3.1 kHz frequency, and through-hole pin spacing to ensure mechanical and electrical compatibility.