SD1209TT-A1

Alarms, Buzzers, And Sirens Overview

The TDK SD1209TT-A1 is a through-hole electromagnetic buzzer designed for audio signaling applications. It operates at a fixed frequency of 2.048 kHz with a rated voltage of 12 Vdc. The device features an externally driven transducer architecture, requiring an external driver circuit to generate the oscillating signal necessary for sound production. It delivers an acoustic output level of up to 85 dB and draws a supply current of 100 mA during operation. The unit is housed in a compact cylindrical package measuring 12.00 mm in diameter and 9.00 mm in height. It supports a wide operating temperature range from -40°C to +85°C and complies with RoHS standards.

Alarms, Buzzers, And Sirens Feature Summary

• Externally driven electromagnetic transducer design
• Fixed frequency operation at 2.048 kHz
• High acoustic output capability up to 85 dB
• Wide operational temperature range suitable for harsh environments

Alarms, Buzzers, And Sirens Applications

• Automotive warning systems
• Household appliance alarms
• Industrial control panel indicators
• Toy electronics

Alarms, Buzzers, And Sirens Procurement Notes

Verify that the application circuit includes an appropriate external driver, as this component is not self-oscillating. Confirm mechanical fit within the enclosure, noting the 12mm diameter and 9mm height dimensions. Ensure the power supply provides stable 12Vdc capable of delivering 100mA. Check for RoHS compliance requirements if applicable to the final product assembly.

Alarms, Buzzers, And Sirens Selection Notes

Select this part when a reliable, high-volume audible indicator is required for 12V systems. It is suitable for designs needing a specific tone at 2.048kHz rather than a variable pitch. Consider the through-hole mounting requirement and ensure PCB layout accommodates the radial leads. Evaluate thermal management needs given the 85°C maximum operating limit.

Alarms, Buzzers, And Sirens Part Context

This component belongs to TDK's SD series of electromagnetic buzzers, which are widely used for general-purpose audio signaling. The series offers various frequencies and voltages, but the SD1209TT-A1 specifically targets the 12V/2.048kHz niche. It serves as a cost-effective alternative to piezoelectric buzzers where higher sound pressure levels are needed without complex driving electronics.

Alarms, Buzzers, And Sirens Replacement Considerations

Direct substitutes must match the 12V rating, 2.048kHz frequency, and through-hole form factor. Verify pin compatibility and acoustic output levels. No specific cross-reference part numbers are publicly confirmed in the provided documentation.