AT-138 Equivalent & Substitute Parts

Part Overview

The AT-138 is a piezoelectric buzzer transducer manufactured by PUI Audio, Inc., designed as an externally driven through-hole component with PC pin termination. This part is classified as obsolete, indicating it is no longer in active production. Due to its obsolete status, identifying functionally compatible substitute components is essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

AT-138

PUI Audio, Inc.In Stock: 1185AT-138 Datasheet

Current PartRFQ

AT-4228-TWT-F-R

PUI Audio, Inc.In Stock: 5221AT-4228-TWT-F-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT-4228-TWT-F-R qualifies as a direct substitute for the AT-138 based on the following alignment of critical parameters:

• Manufacturer: Both components are manufactured by PUI Audio, Inc., ensuring design consistency and application compatibility within the same product ecosystem.
• Series: Both belong to the AT series, confirming compatibility within the established component family.
• Technology: Both utilize piezoelectric technology for acoustic transduction.
• Driver Circuitry: Both are externally driven transducers, requiring the same signal interface methodology.
• Mounting Type: Both employ through-hole mounting, allowing direct PCB integration without redesign.
• Termination: Both use PC pins, ensuring identical electrical connection points.

The AT-4228-TWT-F-R is an active production component, providing long-term availability and supply chain stability compared to the obsolete AT-138.

Parameter Comparison

Engineering Selection Recommendations

The AT-4228-TWT-F-R is the appropriate substitute for the AT-138 based on the following factors:

• Product Status Alignment: The AT-4228-TWT-F-R is in active production, ensuring continued availability and supply chain support, whereas the AT-138 is obsolete.
• Compliance Enhancement: The AT-4228-TWT-F-R achieves ROHS3 compliance, addressing modern regulatory requirements that the non-compliant AT-138 does not meet.
• Functional Compatibility: Both components share identical core parameters—manufacturer, series, technology, driver circuitry, mounting type, and termination—confirming direct functional substitution.
• Regulatory Alignment: Both components maintain REACH Unaffected and EAR99 ECCN classifications, ensuring consistent export and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the AT-4228-TWT-F-R directly replace the AT-138 in existing designs?

A: Yes. Both components share identical mounting type (through hole), termination (PC pins), driver circuitry (externally driven transducer), and technology (piezo). Direct PCB substitution is possible without circuit redesign.

Q: What is the primary difference between these components?

A: The AT-138 is obsolete with unspecified electrical parameters, while the AT-4228-TWT-F-R is an active production component with fully specified parameters including 12V rated voltage, 2.8kHz frequency, 92dB SPL, and ROHS3 compliance.

Q: Are there any compliance considerations for substitution?

A: The AT-4228-TWT-F-R provides ROHS3 compliance, whereas the AT-138 is RoHS non-compliant. This upgrade aligns with current regulatory standards for electronic components in most markets.

Q: Will the AT-4228-TWT-F-R fit the same PCB footprint as the AT-138?

A: Both components use through-hole PC pin termination and identical mounting type. The AT-4228-TWT-F-R dimensions are 42.00mm diameter with 14.50mm maximum seated height. Verify these dimensions against your PCB layout to confirm mechanical compatibility.

Q: What electrical parameters should be verified during substitution?

A: The AT-4228-TWT-F-R operates at 12V rated voltage with a 3–28V range, 7mA supply current, and 2.8kHz frequency. Confirm your circuit design accommodates these specifications before implementation.