AI-4228-P-C28D-R Equivalent & Substitute Parts

Part Overview

The AI-4228-P-C28D-R is a piezo buzzer manufactured by PUI Audio, Inc., designed as an internally driven indicator with panel mount configuration. This component operates at 12V rated voltage with a frequency of 2.8kHz and produces 90dB sound pressure level at 12V, 10cm distance. The product is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring similar acoustic and electrical characteristics.

Substiute Parts

AI-4228-P-C28D-R

PUI Audio, Inc.In Stock: 758AI-4228-P-C28D-R Datasheet

Current PartRFQ

SC628

Mallory Sonalert Products Inc.In Stock: 2025SC628 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AI-4228-P-C28D-R is determined by the following critical parameters:

• Voltage Range Compatibility: Both main and substitute parts must operate within overlapping voltage ranges. The AI-4228-P-C28D-R operates at 6 ~ 28V; substitute parts must support this range or a compatible subset.
• Frequency Tolerance: Operating frequency must be within acceptable acoustic performance parameters. The main part operates at 2.8kHz; substitutes operating at similar frequencies (2.9kHz) fall within acceptable tolerance for single-tone indicator applications.
• Mounting Configuration: Panel mount with screw terminal and quick connect tab termination is required for mechanical compatibility.
• Physical Dimensions: Diameter and height must accommodate existing panel cutouts and mounting hardware. The main part measures 1.673" diameter (42.50mm); substitutes with similar diameters (1.687" / 42.85mm) are mechanically compatible.
• Driver Circuitry: Internally driven piezo technology with DC input ensures direct electrical compatibility without external driver circuits.
• Approval Certifications: cUL and UL certifications provide regulatory compliance equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SC628 from Mallory Sonalert Products Inc. is an active substitute for the obsolete AI-4228-P-C28D-R. Both components share identical voltage range (6 ~ 28V), equivalent piezo technology with internal driver circuitry, and matching regulatory certifications (cUL, UL). Frequency deviation of 0.1kHz (2.8kHz to 2.9kHz) is within acceptable tolerance for single-tone indicator applications. Panel mount configuration and screw terminal termination provide mechanical compatibility.

Key considerations for selection:

• Product Availability: SC628 is active status with 1995 units in stock, ensuring supply continuity compared to the obsolete AI-4228-P-C28D-R.
• Operating Temperature Range: The main part supports -30°C ~ 85°C; SC628 supports -30°C ~ 65°C. Applications requiring operation above 65°C require evaluation of thermal requirements.
• Physical Height: SC628 height of 1.809" (45.96mm) exceeds the main part's 1.299" (33.00mm). Panel depth and clearance must be verified for mechanical fit.
• Current Supply: SC628 operates at 3 ~ 18mA variable range compared to the main part's fixed 10mA. Circuit design must accommodate variable current draw.
• Sound Pressure Level: SC628 produces 68dB @ 6V, 61cm, measured at different conditions than the main part's 90dB @ 12V, 10cm. Direct acoustic comparison requires standardized measurement conditions.

Frequently Asked Questions (FAQ)

Q: Can SC628 directly replace AI-4228-P-C28D-R in existing designs?

A: SC628 provides electrical and functional equivalence within the specified voltage range and frequency tolerance. Mechanical compatibility requires verification of panel depth and mounting clearance due to increased height (45.96mm vs. 33.00mm). Quick connect tab dimensions differ slightly (0.250" vs. 0.256"), requiring terminal compatibility assessment.

Q: What is the frequency difference impact between 2.8kHz and 2.9kHz?

A: The 0.1kHz difference represents 3.6% deviation. For single-tone indicator applications, this frequency variance is within acceptable tolerance and does not affect functional performance or user perception of the alert signal.

Q: Are there temperature limitations when substituting SC628?

A: SC628 operates at -30°C ~ 65°C maximum, compared to AI-4228-P-C28D-R at -30°C ~ 85°C. Applications requiring operation above 65°C must retain the original part or identify alternative substitutes with extended temperature ratings.

Q: How do the current specifications differ?

A: AI-4228-P-C28D-R draws fixed 10mA at rated voltage. SC628 operates at variable 3 ~ 18mA depending on applied voltage within the 6 ~ 28V range. Circuit design must accommodate this variable current draw and ensure power supply capacity at maximum current (18mA).

Q: What is the significance of RoHS non-compliance for SC628?

A: SC628 is marked as RoHS non-compliant. Applications subject to RoHS regulations (EU Directive 2011/65/EU) must verify regulatory requirements before substitution. The main part AI-4228-P-C28D-R does not specify RoHS status in provided data.

Q: Are the quick connect tab dimensions compatible?

A: Quick connect tab dimensions differ: AI-4228-P-C28D-R uses 0.256" (6.50mm) tabs; SC628 uses 0.250" (6.35mm) tabs. Existing connector receptacles must be verified for compatibility with the smaller tab dimension to ensure reliable electrical contact.