SC648A Piezo Buzzer Panel Mount - Equivalent & Substitute Parts

Part Overview

The SC648A is an internally driven piezo buzzer manufactured by Mallory Sonalert Products Inc., designed for panel mount applications with screw terminal and quick connect tab termination. This component operates across AC and DC input types with a voltage range of 10–48V, producing a single tone at 2.9kHz with a sound pressure level of 68dB @ 10V measured at 61cm. The part is currently active in production with 1121 units in stock. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and functional characteristics align with the original specification, enabling seamless integration in applications where component availability or compliance requirements necessitate alternative sourcing.

Substiute Parts

SC648A

Mallory Sonalert Products Inc.In Stock: 1222SC648A Datasheet

Current PartRFQ

SC648AR

Mallory Sonalert Products Inc.In Stock: 1123SC648AR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SC648A is determined by strict alignment across the following critical parameters:

Electrical Performance: Voltage range (10–48V), input type (AC, DC), frequency (2.9kHz), sound pressure level (68dB @ 10V, 61cm), and current supply (4–16mA) must remain identical.

Mechanical Compatibility: Mounting type (panel mount), termination style (screw terminal with quick connect tab – 0.250"), size (1.692" diameter), and height (1.399" maximum seated) must match exactly.

Functional Characteristics: Driver circuitry (internally driven indicator), technology (piezo), and operating mode (single tone) must be preserved.

Environmental Specifications: Operating temperature range (–30°C to 65°C) must be maintained.

The SC648AR qualifies as a direct substitute because it maintains identical electrical, mechanical, and functional specifications across all parameters listed above. The primary distinction is enhanced regulatory compliance: SC648AR carries both cUL and UL approvals and achieves RoHS3 compliance, whereas SC648A is RoHS non-compliant and carries only cUL approval.

Parameter Comparison

Engineering Selection Recommendations

Both SC648A and SC648AR are active products from Mallory Sonalert Products Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory and compliance requirements:

Select SC648A when RoHS compliance is not a design requirement and cUL approval is sufficient for the application.

Select SC648AR when RoHS3 compliance is mandated by design specifications, procurement standards, or end-market regulations. SC648AR also provides extended regulatory coverage through dual cUL and UL approvals, offering additional assurance for applications requiring higher certification standards.

Both parts maintain identical performance characteristics, ensuring functional interchangeability within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can SC648AR be used as a direct replacement for SC648A in existing designs?

A: Yes. SC648AR is electrically and mechanically identical to SC648A across all functional parameters including voltage range, frequency, sound pressure level, current supply, mounting configuration, and termination style. The parts are pin-compatible and functionally interchangeable.

Q: What is the primary difference between SC648A and SC648AR?

A: The primary differences are regulatory compliance and certifications. SC648AR is RoHS3 compliant and carries both cUL and UL approvals, whereas SC648A is RoHS non-compliant and carries only cUL approval. All electrical and mechanical specifications remain identical.

Q: Are there any dimensional or mounting differences between these parts?

A: No. Both parts share identical dimensions (1.692" diameter, 1.399" maximum seated height), mounting type (panel mount), and termination configuration (screw terminal with quick connect tab – 0.250").

Q: Which part should be selected for new designs?

A: SC648AR is recommended for new designs due to its RoHS3 compliance and extended regulatory approvals. However, SC648A remains a valid choice if RoHS compliance is not a design requirement.

Q: Do these parts operate across the same voltage and temperature ranges?

A: Yes. Both SC648A and SC648AR operate across 10–48V (AC or DC) and maintain the same operating temperature range of –30°C to 65°C.

Q: Is the sound output identical between SC648A and SC648AR?

A: Yes. Both parts produce identical acoustic output: 2.9kHz single tone at 68dB @ 10V measured at 61cm.