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CST-931RP-A is listed in the Alarms, Buzzers, And Sirens range at ChipApex. The manufacturer field lists Same Sky (Formerly CUI Devices). Its product description is BUZZER MAGNETIC 3V 9.00MM TH. Review the specifications below when checking this part for your BOM.
The CST-931RP-A is an externally driven magnetic audio transducer manufactured by Same Sky. It operates at a nominal voltage of 3 V with a peak-to-peak input signal and draws 80 mA of current. The device produces a sound pressure level of 92 dB at 3 V measured from a distance of 10 cm. Its resonant frequency is 2.73 kHz. The component utilizes through-hole mounting with side port orientation for sound emission. It is designed for single-tone operation within a temperature range of -20°C to +60°C.
Verify the specific suffix 'RP' confirms the side port orientation, as other variants may differ in acoustic directionality. Ensure the driving circuit can supply the required 80 mA current at 3 V without exceeding thermal limits. Confirm that the through-hole pin spacing matches the target printed circuit board layout before finalizing procurement orders.
Select this model when lateral sound projection is required rather than top-mounted alternatives. The 2.73 kHz frequency provides distinct audibility for alert purposes. Verify that the operating environment remains within the specified -20°C to +60°C range to maintain performance stability and prevent material degradation during continuous use.
This component belongs to the CST series of audio indicators produced by Same Sky, formerly known as CUI Devices. The series offers various mounting styles and acoustic configurations. The CST-931RP-A specifically addresses applications needing side-emitting sound through a robust magnetic transducer mechanism suitable for general-purpose electronic signaling tasks.
Direct substitutes include the CST-934AS, which shares similar electrical characteristics but features a top port instead of a side port. Other compatible options within the CST family must be evaluated for matching voltage, current, and frequency requirements to ensure functional equivalence.
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