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Product Detailed Parameters
- Description：BUZZER MAGNETIC 3V 9MM TH
- Series：AT
- Mfr：PUI Audio, Inc.
- Package：Tray
- Driver Circuitry：Transducer, Externally Driven
- Input Type：Peak-Peak Signal
- Frequency：2.73kHz
- Technology：Electromechanical/Magnetic
- Operating Mode：Single Tone
- Duration：-
- Sound Pressure Level (SPL)：86dB @ 3V, 10cm
- Current - Supply：70mA
- Port Location：Top
- Operating Temperature：-20°C ~ 70°C
- Approval Agency：-
- Ratings：-
- Ingress Protection：-
- Mounting Type：Through Hole
- Termination：PC Pins
- Height - Seated (Max)：0.165" (4.20mm)
- Voltage - Rated：3 V
- Voltage Range：2 ~ 5V
- Size / Dimension：0.354" Dia (9.00mm)
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Overview
The AT-0927-TT-3-R is a surface-mount transducer manufactured by PUI Audio, Inc. It operates at a rated voltage of 3 V with a supply range of 2 to 4 V. The device draws 80 mA of current and produces a sound pressure level of 85 dB at 3 V measured at 10 cm. Its resonant frequency is 2.73 kHz. The component features a top port location and utilizes solder pad termination for surface mount installation. Physical dimensions include a diameter of 9.00 mm (0.354 inches) and a maximum height of 5.00 mm (0.197 inches).
Feature Summary
- Electromechanical magnetic buzzer design for external driving applications.
- Surface mount package configuration with top port orientation.
- Operates within a wide voltage range of 2 to 4 volts.
Applications
- Industrial control panels requiring audible status indicators.
- Medical equipment signaling systems.
- Consumer electronics alert mechanisms.
- Security and fire alarm notification devices.
Procurement Notes
Verify the specific suffix and packaging type when ordering, as distribution channels may offer tape-and-reel or cut-strip formats. Confirm that the external drive circuitry matches the 80 mA current requirement and 3 V nominal voltage specifications. Ensure PCB footprint compatibility with the 9 mm diameter and 5 mm height constraints before finalizing procurement documents.
Selection Notes
Select this component when a low-profile surface mount solution is required for audible alerts. Compare against through-hole alternatives like the AT-0927-TT-3-R if automated assembly capabilities are limited. Evaluate the 85 dB SPL output against acoustic requirements in enclosed spaces. Consider the 2.73 kHz frequency for optimal human hearing perception in noisy environments.
Part Context
This part belongs to the SMT-09 series of compact electromagnetic transducers from PUI Audio. It shares similar acoustic characteristics with other 9mm diameter units but differs in mounting style. The series is designed for space-constrained applications where standard through-hole buzzers cannot fit. It complements PUI's broader portfolio of piezo and magnetic audio components.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Direct replacement requires matching the 9mm diameter, 3V rating, and surface mount footprint. Verify mechanical clearance and electrical drive requirements before substituting with generic equivalents.
