SC250D

Overview

The SC250D is an industrial piezoelectric buzzer from the Mallory Sonalert SC series, designed for high-voltage AC/DC applications. It operates within a voltage range of 60 to 250 VAC or DC and draws a current of approximately 14 mA. The device features a fast pulse tone at a frequency of 2.9 kHz with a sound pressure level of 83 dB(A) @ 2 feet and 60 VAC. It utilizes flush mounting with a recommended hole size of 1.25 inches (31.75 mm). The housing is constructed from black nylon, offering NEMA 3R, 4X, and 12 ingress protection ratings.

Feature Summary

• Internal driver circuitry enables direct connection to AC or DC power sources without external components.
• Flush mount design allows for secure panel installation using standard 1.25-inch holes.
• Nylon housing provides resistance to moisture, chemicals, and corrosion in harsh environments.

Applications

• Industrial control panels requiring audible status alerts
• High-voltage machinery monitoring systems
• Process automation equipment safety indicators

Procurement Notes

Verify the specific suffix code (e.g., D, DJ, FJ) as it determines the exact termination style and acoustic output. Confirm that the operating voltage matches the 60-250V AC/DC specification. Ensure the panel cutout dimension aligns with the required 1.25-inch diameter for proper flush mounting. Check for RoHS compliance requirements if applicable to your assembly standards.

Selection Notes

Select this model when a high-decibel alarm is needed for noisy industrial settings. The internal driver simplifies wiring compared to passive buzzers. Consider the SC250DJ variant if quick-connect terminals are preferred over screw terminals. Verify ambient temperature ranges stay within -30°C to +65°C for reliable operation.

Part Context

This component belongs to the SC series of industrial alarms, known for robust construction and high sound pressure levels. It serves as a critical audio indicator in scenarios where visual signals may be overlooked. The series supports various mounting styles and termination options to fit diverse enclosure designs.

Replacement Considerations

Direct substitutes include other SC250 variants with different terminal types, such as SC250DJ for quick-connect leads. Ensure replacement units maintain the same 2.9 kHz frequency and 60-250V operating range to preserve system compatibility.