AI-278 Equivalent & Substitute Parts

Part Overview

The AI-278 is a 12V piezo buzzer with internally driven indicator circuitry, designed for through-hole mounting with PC pin termination. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The AI-278 operates as a single-tone indicator buzzer suitable for applications requiring audible signaling at 12V DC input.

Substiute Parts

AI-278

PUI Audio, Inc.In Stock: 1133AI-278 Datasheet

Current PartRFQ

AI-3018-TWT-R

PUI Audio, Inc.In Stock: 2155AI-3018-TWT-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AI-3018-TWT-R qualifies as a direct substitute for the AI-278 based on the following alignment of critical parameters:

• Manufacturer: Both parts are manufactured by PUI Audio, Inc., ensuring design and quality consistency
• Series: Both belong to the AI series
• Technology: Both utilize piezo technology
• Driver Circuitry: Both feature internally driven indicator circuitry
• Input Type: Both operate on DC input
• Voltage - Rated: Both are rated for 12V operation
• Mounting Type: Both use through-hole mounting
• Termination: Both feature PC pin termination

The AI-3018-TWT-R represents an active product with enhanced specifications and improved compliance status, making it suitable for direct replacement in applications currently using the obsolete AI-278.

Parameter Comparison

Engineering Selection Recommendations

The AI-3018-TWT-R is the designated substitute for the obsolete AI-278. Selection of this substitute is based on:

• Product Status Alignment: The AI-3018-TWT-R is an active product with current manufacturing support, addressing the obsolescence of the AI-278
• Compliance Enhancement: The AI-3018-TWT-R achieves ROHS3 compliance, improving regulatory standing compared to the non-compliant AI-278
• Functional Equivalence: Both parts maintain identical core specifications for voltage rating, mounting type, termination style, and driver circuitry
• Regulatory Consistency: Both parts share identical ECCN and HTSUS classifications, ensuring consistent export and import treatment

For applications currently using the AI-278, transition to the AI-3018-TWT-R provides access to an actively supported component with enhanced environmental compliance.

Frequently Asked Questions (FAQ)

Q: Can the AI-3018-TWT-R directly replace the AI-278 in existing designs?

A: Yes. Both parts share identical rated voltage (12V), mounting type (through-hole), termination style (PC pins), and driver circuitry (internally driven indicator). The AI-3018-TWT-R maintains functional compatibility with the AI-278 in DC-powered applications.

Q: What are the key differences between these parts?

A: The AI-3018-TWT-R provides additional specifications not documented for the AI-278, including operating temperature range (-30°C ~ 80°C), frequency (1.8kHz), current supply (18mA), and sound pressure level (87dB @ 12V, 10cm). The AI-3018-TWT-R also achieves ROHS3 compliance, whereas the AI-278 is RoHS non-compliant.

Q: Does the AI-3018-TWT-R support the same voltage range as the AI-278?

A: The AI-278 voltage range is not specified in available documentation. The AI-3018-TWT-R operates across 3 ~ 28V, providing broader voltage compatibility while maintaining 12V as the rated operating voltage.

Q: Are there packaging differences between these parts?

A: The AI-278 packaging is not specified. The AI-3018-TWT-R is supplied in bulk packaging. Both parts use identical through-hole mounting with PC pin termination.

Q: What is the physical size difference?

A: The AI-278 dimensions are not documented. The AI-3018-TWT-R has a diameter of 1.181" (30.00mm) and maximum seated height of 0.709" (18.00mm).