SC628AHJR

Overview

The SC628AHJR is a piezoelectric buzzer from the Mallory Sonalert SC series, designed for industrial audio indication. It operates on a voltage range of 6 to 28 VAC/DC and draws a current between 4 and 16 mA. The device produces a continuous tone at a frequency of 4.5 kHz with a sound pressure level of 68 dBA measured at 6V and 61cm. It features screw terminals with quick-connect tabs (0.250 inches) for secure mounting. The unit has a diameter of approximately 43 mm and supports panel installation within an operating temperature range of -30°C to 65°C.

Feature Summary

• Internal driver circuitry enables direct connection to AC or DC power sources without external components.
• Piezoelectric technology ensures reliable operation across a wide industrial temperature range.
• Screw terminal connections provide robust mechanical and electrical stability in vibration-prone environments.

Applications

• Industrial machinery status indicators
• Control panel alarm systems
• Electrical enclosure safety alerts

Procurement Notes

Verify that the specific suffix 'JR' aligns with your required termination style and certification needs, as variants may differ in lead time or compliance documentation. Confirm the exact voltage rating matches your system's output, as this model supports both AC and DC inputs within its specified range. Ensure panel cutout dimensions accommodate the 43 mm diameter for proper flush or panel mounting.

Selection Notes

Select this component when a self-contained, internally driven buzzer is required for simple wiring applications. The 4.5 kHz frequency offers distinct audibility compared to lower-frequency alternatives. Consider the 68 dBA output level relative to ambient noise; higher SPL models like the SC628NDR are available if louder alerts are necessary. Verify that the screw terminal interface suits your existing harness or wiring infrastructure.

Part Context

This part belongs to the Mallory Sonalert SC series, which provides a range of industrial-grade audio indicators. The series includes various tones, frequencies, and mounting styles to suit different alert requirements. The SC628AHJR specifically addresses needs for moderate-volume, continuous-tone signaling in standard industrial control panels.

Replacement Considerations

SC628AHR is listed as a direct substitute for the SC628AH model family. Verify that the replacement maintains the same 4.5 kHz continuous tone and 6-28V operating range before implementation.