SC250NJ

Overview

The SC250NJ is a piezoelectric buzzer from the Mallory Sonalert SC series, designed for panel mounting. It operates on AC or DC voltages ranging from 60 to 250V with a current draw of 6 to 24mA. The device emits a continuous tone at a frequency of 2.9kHz, achieving a sound pressure level of 80dB at 60V. It features an internally driven indicator and utilizes screw terminals for connection. The unit measures 1.687 inches in diameter and 1.399 inches in height, operating within a temperature range of -30°C to 65°C.

Feature Summary

• Internally driven piezoelectric technology for direct voltage application
• Dual AC/DC compatibility across a wide voltage spectrum
• Robust metal construction suitable for industrial environments

Applications

• Industrial machinery status indication
• Control panel alarm signaling
• Equipment fault detection systems

Procurement Notes

Verify the specific suffix against the manufacturer's datasheet to confirm electrical characteristics such as frequency and sound pressure level. Ensure the mounting hole dimensions match the panel requirements. Confirm terminal type compatibility with existing wiring infrastructure before procurement.

Selection Notes

Select this component when high-volume audible alerts are required without external driver circuits. The wide voltage tolerance simplifies integration into varying power supply architectures. Consider the physical size constraints and the need for screw-terminal connections during the design phase.

Part Context

Part of the SC series, known for durable metal housing and reliable performance in harsh conditions. This model represents a standard industrial alert solution, distinct from lower-voltage or plastic-housed variants in the broader Mallory portfolio.

Replacement Considerations

SC250KR is a similar piezo buzzer but may differ in specific acoustic output or current draw. Verify exact pinout and dimensional tolerances before substitution.