SC250HJ

Overview

The SC250HJ is an industrial-grade piezoelectric buzzer from the Mallory Sonalert SC series, designed for panel mounting. It operates on AC or DC voltages ranging from 60V to 250V with a current consumption of approximately 16mA. The device emits a medium pulse tone at a frequency of 4500Hz and achieves a sound pressure level of 80dBA. Physical dimensions include a diameter of 43mm (1.69 inches) and a height of 1.41 inches, terminating via screw connections.

Feature Summary

• Features internal drive circuitry for direct connection to power sources without external drivers.
• Utilizes piezoelectric technology to generate audible alerts in industrial environments.
• Supports both AC and DC input voltage ranges for versatile integration.

Applications

• Industrial machinery status indication
• Equipment fault warning systems
• Control panel audio signaling

Procurement Notes

Verify the specific suffix against official Mallory Sonalert documentation to confirm exact acoustic characteristics such as pulse rate and sound pressure level. Ensure the selected variant matches the required operating voltage range and termination style for the target application environment.

Selection Notes

Select this component when a high-voltage compatible, self-contained audio indicator is required. Consider the 4500Hz frequency and pulse tone profile for distinctiveness in noisy settings. Verify that the panel cutout dimensions accommodate the 43mm diameter and that screw terminals are suitable for the wiring infrastructure.

Part Context

Part of the Mallory Sonalert SC series, established since the 1960s as a standard for panel alarms. The manufacturer specializes in piezoelectric audio devices for industrial, medical, and consumer sectors, maintaining a focus on durable, high-performance signaling solutions.

Replacement Considerations

Consult official substitution guides for variants with different frequencies or tones within the SC series. Direct replacements must match the 60-250V operating range and physical mounting dimensions to ensure compatibility.