SNP428FR

Alarms, Buzzers, And Sirens Overview

The Mallory Sonalert SNP428FR is a piezoelectric buzzer from the SNP series, designed for industrial audio indication. It operates on a DC input voltage range of 4 to 28 volts and draws a supply current between 0.5 and 3 milliamperes. The device generates a continuous tone at a frequency of 2.9 kHz with an internal driver circuit. Acoustic performance includes a sound pressure level of 52 dB measured at 4V and 61 cm. Physical dimensions are characterized by a diameter of 41.66 mm (1.640 inches) and a maximum installation height of 23.03 mm (0.907 inches). It utilizes solder lug termination for panel mounting.

Alarms, Buzzers, And Sirens Feature Summary

• Integrates an internal driver circuit for simplified connection to control logic.
• Produces a continuous single-tone acoustic signal for steady-state alerts.
• Features a compact circular form factor suitable for tight panel spaces.

Alarms, Buzzers, And Sirens Applications

• Industrial machinery status monitoring
• Control panel alarm systems
• Equipment fault indication

Alarms, Buzzers, And Sirens Procurement Notes

Verify the specific suffix against official Mallory Sonalert documentation to confirm exact electrical tolerances and acoustic output specifications. Ensure the required operating voltage aligns with the 4-28VDC range. Confirm that the solder lug termination style matches the target PCB or wiring harness design before finalizing procurement.

Alarms, Buzzers, And Sirens Selection Notes

Select this component when a low-power, internally driven indicator is required for panel-mounted applications. The narrow current draw makes it suitable for battery-operated or sensitive control circuits. Verify that the 52 dB SPL meets the ambient noise requirements of the intended installation environment.

Alarms, Buzzers, And Sirens Part Context

This part belongs to the SNP series of piezoelectric buzzers manufactured by Mallory Sonalert Products Inc. The series focuses on compact, internally driven indicators for industrial environments. The model shares physical dimensions with other variants in the family but differs in electrical characteristics and acoustic output levels.

Alarms, Buzzers, And Sirens Replacement Considerations

Consult official Mallory Sonalert cross-reference guides for verified substitutes. Direct replacements must match the 41.66mm diameter, 2.9kHz frequency, and internal driver configuration to ensure mechanical and functional compatibility.