SC628P-2 Equivalent & Substitute Parts

Part Overview

The SC628P-2 is an internally driven piezo buzzer manufactured by Mallory Sonalert Products Inc., designed for panel mount applications with screw terminal connections. This component operates across a 6–28V DC voltage range, producing a 2.9kHz tone at 68dB SPL (measured at 6V, 61cm distance) with a current draw of 4–16mA. The part is classified as obsolete, necessitating identification of active equivalent models to maintain design continuity and ensure ongoing component availability for new production runs and field replacements.

Substiute Parts

SC628P-2

Mallory Sonalert Products Inc.In Stock: 1128SC628P-2 Datasheet

Current PartRFQ

SC628P-BTR

Mallory Sonalert Products Inc.In Stock: 962SC628P-BTR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SC628P-BTR qualifies as a direct substitute for the SC628P-2 based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Identical manufacturer (Mallory Sonalert Products Inc.)
• Identical frequency (2.9kHz)
• Identical voltage range (6–28V DC)
• Identical sound pressure level (68dB @ 6V, 61cm)
• Identical technology (Piezo, internally driven)
• Identical operating mode (Pulse, Fast)
• Identical mounting type (Panel Mount)
• Identical RoHS compliance (ROHS3)
• Compatible size (42.98mm vs. 42.85mm diameter – within mechanical tolerance)

Allowable Variations:

• Current supply range: SC628P-2 (4–16mA) vs. SC628P-BTR (6–26mA) – the substitute accommodates the original specification within its broader range
• Termination: SC628P-2 uses screw terminals; SC628P-BTR adds quick connect tab (0.250") as an alternative termination option while retaining screw terminal compatibility
• Height: SC628P-BTR (1.399" seated) is shorter than SC628P-2 (1.946" seated), providing improved panel depth efficiency
• Operating temperature: SC628P-BTR (–30°C to +65°C) is narrower than SC628P-2 (–40°C to +85°C); verify application requirements
• Product status: SC628P-BTR is active, ensuring continued availability

Parameter Comparison

Engineering Selection Recommendations

The SC628P-BTR is the recommended substitute for the obsolete SC628P-2. Both components maintain identical electrical performance (voltage, frequency, SPL) and are manufactured by the same supplier with equivalent internal drive circuitry. The SC628P-BTR carries active product status, ensuring long-term availability and supply chain continuity.

Compliance Considerations:

• SC628P-BTR includes cUL and UL certifications, providing enhanced regulatory coverage compared to the SC628P-2
• Both parts maintain ROHS3 compliance and REACH unaffected status

Application Compatibility:

• Verify operating temperature requirements: if the application demands operation below –30°C or above +65°C, the SC628P-2 specification cannot be fully replicated
• Panel depth constraints: the SC628P-BTR's reduced height (1.399" vs. 1.946") may require mechanical redesign of mounting fixtures
• Termination flexibility: the SC628P-BTR's quick connect tab option provides installation flexibility while maintaining screw terminal compatibility for existing designs

Frequently Asked Questions (FAQ)

Q: Can SC628P-BTR directly replace SC628P-2 in existing designs? A: Yes, for applications operating within –30°C to +65°C. The electrical performance, frequency, SPL, and mounting type are identical. If your application requires the full –40°C to +85°C range of the original part, thermal performance must be re-evaluated.

Q: What is the significance of the current supply range difference (4–16mA vs. 6–26mA)? A: The SC628P-BTR's broader current range encompasses the SC628P-2 specification. The substitute will operate correctly within the original 4–16mA window. The extended upper range (up to 26mA) provides design flexibility for higher-current applications without affecting compatibility.

Q: Does the quick connect tab termination affect compatibility? A: No. The SC628P-BTR retains screw terminal capability, maintaining mechanical and electrical compatibility with existing wiring harnesses. The quick connect tab is an additional feature that does not interfere with screw terminal operation.

Q: Why is the SC628P-BTR shorter than the SC628P-2? A: The SC628P-BTR (1.399" seated height) uses a more compact internal design while maintaining identical acoustic output. This reduction in height may require verification of panel cutout dimensions and mounting depth clearances in your enclosure.

Q: Are there regulatory differences between these parts? A: Yes. The SC628P-BTR includes cUL and UL certifications, whereas the SC628P-2 does not list approval agencies. If your application requires specific regulatory certifications, the SC628P-BTR provides enhanced compliance documentation.

Q: What should I verify before implementing the SC628P-BTR? A: Confirm that your application's operating temperature range falls within –30°C to +65°C, verify panel mounting dimensions accommodate the 42.98mm diameter and 1.399" height, and confirm that existing wiring harnesses are compatible with screw terminal connections.