AT-22 Equivalent & Substitute Parts

Part Overview

The AT-22 is a through-hole piezo buzzer transducer manufactured by PUI Audio, Inc., designed as an externally driven piezo device operating at 3kHz. This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure ongoing component availability for production and repair applications. The AT-22 serves as a signaling transducer in applications requiring piezo-based acoustic output with through-hole mounting and PC pin termination.

Substiute Parts

AT-22

PUI Audio, Inc.In Stock: 870AT-22 Datasheet

Current PartRFQ

AT-2428-TWT-R

PUI Audio, Inc.In Stock: 738AT-2428-TWT-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT-2428-TWT-R qualifies as a direct substitute for the AT-22 based on the following core substitution criteria:

Matching Parameters:

• Manufacturer: PUI Audio, Inc. (same manufacturer ensures design compatibility)
• Series: AT (same product family)
• Technology: Piezo (same acoustic technology)
• Driver Circuitry: Transducer, Externally Driven (identical functional classification)
• Frequency: 3kHz (identical operating frequency)
• Mounting Type: Through Hole (identical mechanical mounting)
• Termination: PC Pins (identical electrical connection method)

The AT-2428-TWT-R is an active product with enhanced specifications including rated voltage (12V), defined current consumption (8mA), and documented sound pressure level (92dB @ 12V, 10cm), making it a functionally superior replacement for the obsolete AT-22.

Parameter Comparison

Engineering Selection Recommendations

The AT-2428-TWT-R is the direct equivalent for the obsolete AT-22. Selection of this substitute is based on:

Product Status Alignment: The AT-2428-TWT-R is an active product with current manufacturing support, ensuring long-term availability and supply chain continuity.

Compliance Enhancement: The AT-2428-TWT-R achieves ROHS3 compliance, addressing regulatory requirements that may not have applied to the original AT-22 design. Both parts maintain REACH Unaffected status.

Functional Equivalence: Identical core parameters (piezo technology, 3kHz frequency, through-hole mounting, PC pin termination, externally driven operation) ensure direct functional replacement without circuit redesign.

Specified Performance Characteristics: The AT-2428-TWT-R provides documented electrical and acoustic specifications (12V rated, 8mA supply current, 92dB SPL), enabling precise circuit design and performance validation compared to the unspecified AT-22.

Frequently Asked Questions (FAQ)

Q: Can the AT-2428-TWT-R directly replace the AT-22 without circuit modification?

A: Yes. Both components share identical core parameters: piezo technology, 3kHz frequency, through-hole mounting, PC pin termination, and externally driven operation. The AT-2428-TWT-R operates within a 3V to 28V range, providing design flexibility for existing circuits.

Q: What is the primary difference between the AT-22 and AT-2428-TWT-R?

A: The AT-2428-TWT-R is an active product with fully specified electrical characteristics (12V rated voltage, 8mA current, 92dB SPL) and ROHS3 compliance. The AT-22 is obsolete with unspecified performance parameters. The AT-2428-TWT-R also includes feedback technology and washable ratings.

Q: Are there packaging differences between these parts?

A: The AT-22 packaging is listed as unspecified. The AT-2428-TWT-R is supplied in Bulk packaging. Both use identical through-hole PC pin termination suitable for standard PCB assembly processes.

Q: Does the AT-2428-TWT-R meet current regulatory requirements?

A: Yes. The AT-2428-TWT-R is ROHS3 compliant and REACH Unaffected, meeting current environmental and regulatory standards. The obsolete AT-22 was RoHS non-compliant.

Q: What is the physical size difference?

A: The AT-2428-TWT-R has documented dimensions of 0.945" diameter (24.00mm) and 0.492" maximum seated height (12.50mm). The AT-22 dimensions are not specified in available documentation.