SC628AJ Equivalent & Substitute Parts

Part Overview

The SC628AJ 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 a 6–28V range with a 2.9kHz frequency output and 68dB sound pressure level at 6V measured at 61cm. The part is currently active in production and widely used in indicator and alarm applications requiring audible feedback.

Identifying equivalent and substitute parts is necessary when the primary part becomes unavailable, when design revisions require updated compliance certifications, or when inventory constraints necessitate alternative sourcing from the same manufacturer's product line.

Substiute Parts

SC628AJ

Mallory Sonalert Products Inc.In Stock: 939SC628AJ Datasheet

Current PartRFQ

SC628AJR

Mallory Sonalert Products Inc.In Stock: 1076SC628AJR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC628AJ is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part SC628AJR maintains identical specifications for voltage range, frequency, sound pressure level, current supply, operating temperature range, mounting configuration, termination style, and physical dimensions. Both parts belong to the same SC series from Mallory Sonalert Products Inc. and share identical driver circuitry, input type, and operating modes.

The key parameters that define substitution eligibility are:

• Voltage Range: 6–28V
• Frequency: 2.9kHz
• Sound Pressure Level: 68dB @ 6V, 61cm
• Current Supply: 6–23mA
• Mounting Type: Panel Mount
• Termination: Screw Terminal, Quick Connect Tab – 0.250" (6.35mm)
• Physical Dimensions: 1.692" Dia (42.98mm), Height 1.399" (35.54mm)
• Operating Temperature: −30°C to 65°C
• Input Type: AC, DC
• Operating Mode: Pulse, Slow
• Duration: 0.5–2.5 PPS

Parameter Comparison

Engineering Selection Recommendations

Both SC628AJ and SC628AJR are active products from Mallory Sonalert Products Inc. with identical electrical and mechanical specifications. The SC628AJR offers enhanced compliance status, holding both cUL and UL approvals compared to the SC628AJ's cUL certification alone. Additionally, SC628AJR meets ROHS3 compliance requirements, whereas SC628AJ is RoHS non-compliant.

Selection between these parts should be based on regulatory and compliance requirements of the end application. For applications requiring RoHS3 compliance or dual UL/cUL certification, SC628AJR is the appropriate choice. For applications with existing RoHS non-compliant designs or where cUL certification alone is sufficient, SC628AJ remains functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Are SC628AJ and SC628AJR electrically interchangeable?

A: Yes. Both parts operate identically across all electrical parameters: 6–28V input range, 2.9kHz frequency, 68dB sound pressure level at 6V measured at 61cm, and 6–23mA current supply. They support identical input types (AC, DC) and operating modes (Pulse, Slow).

Q: Are the physical dimensions identical?

A: Yes. Both parts share identical panel mount configuration with 1.692" diameter (42.98mm) and maximum seated height of 1.399" (35.54mm). Termination is identical: Screw Terminal with Quick Connect Tab – 0.250" (6.35mm).

Q: What is the difference between SC628AJ and SC628AJR?

A: The primary differences are compliance certifications and RoHS status. SC628AJR holds both cUL and UL approvals and is ROHS3 compliant, while SC628AJ holds cUL approval only and is RoHS non-compliant. All functional and mechanical specifications are identical.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS3 compliance or dual UL/cUL certification, specify SC628AJR. Both parts are active products with equivalent availability.

Q: Can I use SC628AJR as a direct replacement for SC628AJ in existing designs?

A: Yes. SC628AJR is a direct substitute with identical electrical and mechanical specifications. No circuit or mechanical modifications are required.

Q: What is the operating temperature range for both parts?

A: Both SC628AJ and SC628AJR operate across −30°C to 65°C.