SMT-2240-TW-R Equivalent & Substitute Parts

Part Overview

The SMT-2240-TW-R is a piezoelectric buzzer transducer manufactured by PUI Audio, Inc., designed for externally driven applications requiring single-tone audio output. This surface mount component operates at a rated voltage of 10V with a frequency of 4kHz and produces 90dB sound pressure level at 10cm distance. The product is currently classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing design requirements and production continuity.

Substiute Parts

SMT-2240-TW-R

PUI Audio, Inc.In Stock: 829SMT-2240-TW-R Datasheet

Current PartRFQ

SMT-2240-TW-2-R

PUI Audio, Inc.In Stock: 2524SMT-2240-TW-2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The SMT-2240-TW-R has one identified substitute part: SMT-2240-TW-2-R. Substitution eligibility is determined by the following critical parameters:

Core Compatibility Parameters:

• Technology: Piezo (both parts)
• Driver Circuitry: Transducer, Externally Driven (both parts)
• Operating Mode: Single Tone (both parts)
• Frequency: 4kHz (both parts)
• Size / Dimension: 0.886" Dia (22.50mm) (both parts)
• Height - Seated (Max): 0.287" (7.30mm) (both parts)
• Termination: Solder Pads (both parts)
• Voltage Range: 1 ~ 30V (both parts)

Allowable Variation Parameters:

• Voltage - Rated: 10V (main part) vs. 12V (substitute) — both operate within the common 1 ~ 30V range
• Sound Pressure Level: 90dB @ 10V, 10cm (main part) vs. 90dB @ 12V, 10cm (substitute) — equivalent SPL at respective rated voltages
• Operating Temperature: -20°C ~ 70°C (main part) vs. -30°C ~ 70°C (substitute) — substitute offers extended low-temperature range
• Product Status: Obsolete (main part) vs. Active (substitute) — substitute is in active production

Parameter Comparison

Engineering Selection Recommendations

The SMT-2240-TW-2-R is the designated substitute for the obsolete SMT-2240-TW-R. Selection of the substitute part is supported by the following factors:

Product Status: The SMT-2240-TW-2-R is in active production status, ensuring supply chain continuity and availability for new designs and production runs.

Compliance: The substitute part carries ROHS3 compliance certification, meeting current regulatory requirements for electronic components in restricted substance directives.

Environmental Certification: Both parts maintain REACH Unaffected status and identical ECCN/HTSUS classifications, ensuring consistent regulatory treatment.

Functional Equivalence: Both parts operate at 4kHz with identical physical dimensions (22.50mm diameter, 7.30mm height) and equivalent sound pressure output (90dB at their respective rated voltages). Both support the full 1 ~ 30V operating range, accommodating circuit designs originally specified for 10V operation.

Temperature Performance: The substitute part extends the low-temperature operating range to -30°C, providing enhanced performance in cold environment applications.

Frequently Asked Questions (FAQ)

Q: Can SMT-2240-TW-2-R directly replace SMT-2240-TW-R in existing designs?

A: Yes, for applications where the circuit can accommodate the 12V rated voltage. Both parts share identical frequency (4kHz), physical dimensions (22.50mm diameter), and operate within the same 1 ~ 30V voltage range. The substitute produces equivalent sound pressure level (90dB) at its rated voltage.

Q: What is the difference in mounting type between these parts?

A: The SMT-2240-TW-R specifies Surface Mount mounting type, while SMT-2240-TW-2-R specifies Custom mounting type. Both parts feature solder pad termination suitable for surface mount assembly processes.

Q: Does the rated voltage difference affect compatibility?

A: The rated voltage difference (10V vs. 12V) does not prevent substitution. Both parts operate across the 1 ~ 30V range. Circuit designs originally operating at 10V can continue to function with the substitute part, which is rated for 12V operation.

Q: What compliance advantages does the substitute part offer?

A: The SMT-2240-TW-2-R carries ROHS3 compliance certification, meeting current regulatory requirements. Both parts maintain REACH Unaffected status and identical export classification codes.

Q: Is current consumption specified for the substitute part?

A: Current consumption is not specified for SMT-2240-TW-2-R. The original part specifies 3mA supply current. Contact the manufacturer for current specifications of the substitute part if this parameter is critical for circuit design.

Q: What is the advantage of the extended temperature range in the substitute part?

A: The SMT-2240-TW-2-R operates from -30°C to 70°C, compared to -20°C to 70°C for the original part. This extended low-temperature range provides operational capability in colder environments.