AT-33 Equivalent & Substitute Parts

Part Overview

The AT-33 is a piezoelectric buzzer transducer manufactured by PUI Audio, Inc., designed as an externally driven through-hole component. This part is classified as obsolete, which necessitates identification of active equivalent alternatives for ongoing design and procurement requirements. The AT-33 operates as a passive piezo transducer requiring external driver circuitry for operation.

Substiute Parts

AT-33

PUI Audio, Inc.In Stock: 1021AT-33 Datasheet

Current PartRFQ

AT-3425-TWT-R

PUI Audio, Inc.In Stock: 5206AT-3425-TWT-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT-3425-TWT-R qualifies as a direct substitute based on the following alignment of core parameters:

• Manufacturer: Both parts are manufactured by PUI Audio, Inc.
• Series: Both belong to the AT series
• Technology: Both utilize piezoelectric technology
• Driver Circuitry: Both are externally driven transducers
• Mounting Type: Both are through-hole mounted components
• Termination Style: Both use PC pins for connection

The AT-3425-TWT-R represents an active product with enhanced specifications, including defined voltage rating (12V), frequency (2.5kHz), sound pressure level (85dB @ 12V, 10cm), and improved compliance status (ROHS3 Compliant).

Parameter Comparison

Engineering Selection Recommendations

The AT-3425-TWT-R is the designated substitute for the obsolete AT-33. Selection of this alternative is based on:

• Product Status Alignment: The AT-3425-TWT-R maintains active production status, ensuring long-term availability and supply chain continuity.
• Compliance Enhancement: The AT-3425-TWT-R achieves ROHS3 compliance, addressing regulatory requirements that the AT-33 does not meet.
• Functional Equivalence: Both components share identical core architecture (externally driven piezo transducers in through-hole configuration from the same manufacturer series).
• Specification Definition: The AT-3425-TWT-R provides complete electrical and mechanical specifications, enabling precise circuit design and integration validation.

Frequently Asked Questions (FAQ)

Q: Can the AT-3425-TWT-R directly replace the AT-33 in existing designs?

A: Yes. Both components are externally driven piezoelectric transducers in through-hole mounting configuration from the PUI Audio AT series. The AT-3425-TWT-R provides defined operating parameters (12V rated, 2.5kHz, 85dB SPL) that enable circuit validation. Existing driver circuitry must be verified for compatibility with the 12V rating and 7mA supply current of the substitute.

Q: What are the key differences between AT-33 and AT-3425-TWT-R?

A: The AT-33 specifications are not fully defined in available documentation. The AT-3425-TWT-R provides complete electrical characteristics including voltage range (3~28V), frequency (2.5kHz), sound pressure level (85dB @ 12V, 10cm), and operating temperature range (-30°C ~ 85°C). The AT-3425-TWT-R also achieves ROHS3 compliance versus the non-compliant status of AT-33.

Q: Are there packaging differences between these parts?

A: Both components use through-hole mounting with PC pin termination. The AT-3425-TWT-R specifies a 33.60mm diameter and 15.40mm maximum seated height. Packaging format for AT-3425-TWT-R is bulk.

Q: What compliance certifications apply to the substitute?

A: The AT-3425-TWT-R is ROHS3 compliant and REACH unaffected. Both parts share the same ECCN (EAR99) and HTSUS (8531.80.9041) classifications.

Q: Is the AT-3425-TWT-R suitable for designs requiring RoHS compliance?

A: Yes. The AT-3425-TWT-R achieves ROHS3 compliance, making it suitable for applications with RoHS requirements. The obsolete AT-33 does not meet this standard.