SC628

Overview

The Mallory Sonalert SC628 is an industrial-grade piezoelectric buzzer series designed for audio indication and alerting applications. Operating within a voltage range of 6 to 28 VAC or DC, these devices utilize internal drive circuits to generate various acoustic signals including continuous tones, slow pulses, fast pulses, and warble modes. The series features a standard 43 mm diameter housing suitable for panel or flush mounting with screw terminals or wire leads. Acoustic performance varies by specific suffix, offering sound pressure levels from 55 dBA to 98 dBA at frequencies typically between 1.9 kHz and 4.5 kHz, with current consumption ranging from 2 mA to 30 mA depending on the configuration.

Feature Summary

• Integrated internal drive circuitry enables direct connection to AC or DC power sources without external oscillators.
• Piezoelectric technology provides reliable acoustic output in industrial environments with wide operating temperature ranges.
• Multiple acoustic configurations available, including continuous, pulsed, and warble tones with varying loudness levels.
• Versatile mounting options support both panel mount and flush mount installations via screw terminals or wire leads.

Applications

• Industrial machinery status indicators
• Control panel alarm systems
• Equipment fault detection alerts
• Safety warning systems

Procurement Notes

Verify the complete part number suffix to confirm specific electrical parameters such as tone type, frequency, and sound pressure level, as the base SC628 designation covers multiple variants. Confirm terminal type requirements, as some models use screw terminals while others utilize wire leads. Check RoHS compliance status individually per variant, as indicated by specific suffixes. Ensure mounting style matches the enclosure design, distinguishing between panel mount and flush mount specifications.

Selection Notes

Select based on required acoustic signature, specifically choosing between continuous, pulse, or warble modes. Match the voltage rating to the system supply, noting compatibility with both AC and DC inputs where specified. Consider sound pressure level requirements for the application environment, ranging from soft to loud outputs. Verify physical dimensions and mounting method to ensure fit within the designated panel space.

Part Context

The SC628 belongs to the Mallory Sonalert SC series of industrial buzzers. This family is characterized by robust construction for harsh environments and standardized 43 mm form factors. Variants are distinguished by suffix codes indicating specific acoustic characteristics, terminal styles, and certification statuses such as CUL approval.

Replacement Considerations

Direct replacements require matching the exact suffix code to preserve electrical and acoustic specifications. Cross-referencing requires verifying identical voltage ranges, current draw, and mounting dimensions. Consult manufacturer substitution guides for equivalent industrial piezoelectric buzzers if specific suffixes are unavailable.

FAQ

Does the SC628 series operate on both AC and DC power?

Yes, most variants in the SC628 series are rated for operation on both AC and DC voltages within the 6 to 28 V range, though specific models may be optimized for one type.

What mounting styles are available for the SC628 series?

The series supports both Panel Mount and Flush Mount configurations, utilizing either screw terminals or wire leads depending on the specific model suffix.

How is the acoustic output defined in the SC628 nomenclature?

Acoustic output is defined by the suffix, which specifies the tone type (e.g., Continuous, Pulse, Warble), frequency, and relative loudness level (e.g., Soft, Loud, Xloud).