AS03508CO-3 Equivalent & Substitute Parts

Part Overview

The AS03508CO-3 is an 8 Ohm general purpose speaker rated at 1 W with a top port configuration and 84 dB sound pressure level (SPL) efficiency. Manufactured by PUI Audio, Inc., this component operates across a 500 Hz to 20 kHz frequency range with a cloth cone and neodymium-iron-boron magnet. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

AS03508CO-3

PUI Audio, Inc.In Stock: 1063AS03508CO-3 Datasheet

Current PartRFQ

AS03508CO-7-R

PUI Audio, Inc.In Stock: 1360AS03508CO-7-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AS03508CO-7-R qualifies as a direct substitute based on the following critical parameters:

• Impedance Match: Both parts are rated at 8 Ohms, ensuring electrical compatibility in existing circuits
• Power Rating Match: Both support 1 W rated power and 2 W maximum power handling
• Frequency Range Compatibility: The substitute operates at 700 Hz ~ 20 kHz, which overlaps the upper frequency range of the original part (500 Hz ~ 20 kHz). The 200 Hz difference in lower frequency response represents a minor deviation acceptable for general purpose speaker applications
• Port Location: Both feature top port configuration, maintaining mechanical compatibility with enclosure designs
• Physical Form Factor: Both use oval, rectangular frame construction with cloth cone and Nd-Fe-B magnet technology
• Efficiency Proximity: The substitute operates at 83 dB SPL versus 84 dB SPL on the original, a 1 dB difference within typical manufacturing tolerances

Parameter Comparison

Engineering Selection Recommendations

The AS03508CO-7-R is the designated substitute for the obsolete AS03508CO-3. Selection of the substitute part is supported by:

• Active Product Status: The AS03508CO-7-R maintains active manufacturing status, ensuring long-term availability and supply chain continuity
• RoHS3 Compliance: The substitute meets ROHS3 compliance requirements, whereas the original part is RoHS non-compliant. This compliance improvement aligns with current regulatory standards for electronic component procurement
• Electrical Equivalence: Matching impedance and power ratings ensure direct functional replacement in existing circuit designs
• Mechanical Compatibility: Identical port location and frame construction support existing mechanical mounting and enclosure designs, though dimensional differences require verification for space-constrained applications

The primary design consideration is the termination method change from solder eyelets to solder pads, which requires PCB layout adjustment. Additionally, the smaller physical footprint (35mm x 16mm versus 40mm x 20mm) and reduced height (6.10mm versus 8.00mm) may provide space optimization benefits in compact designs.

Frequently Asked Questions (FAQ)

Q: Can the AS03508CO-7-R be used as a direct drop-in replacement for the AS03508CO-3?

A: Electrical compatibility is confirmed through matching impedance (8 Ohms) and power ratings (1 W rated, 2 W maximum). Mechanical compatibility is supported by identical port location and frame construction. However, the termination method differs (solder pads versus solder eyelets), requiring PCB design modification. The smaller physical dimensions must be verified against space constraints in the target application.

Q: What is the significance of the frequency range difference between these parts?

A: The AS03508CO-3 operates from 500 Hz to 20 kHz, while the AS03508CO-7-R operates from 700 Hz to 20 kHz. The 200 Hz difference in lower frequency response represents a shift in the self-resonant frequency from 500 Hz to 700 Hz. For general purpose speaker applications, this difference is within acceptable tolerances. Applications requiring specific low-frequency response below 700 Hz should evaluate this parameter against system requirements.

Q: What does the 1 dB difference in efficiency (84 dB versus 83 dB SPL) mean for system performance?

A: The efficiency difference of 1 dB SPL is within typical manufacturing tolerances for magnetic speaker technology. At the specified testing condition of 1 W at 500 mm, this represents a negligible acoustic output difference in practical applications. System-level acoustic performance depends on multiple factors including enclosure design, circuit impedance matching, and acoustic environment.

Q: Why is RoHS compliance important for this substitution?

A: The AS03508CO-7-R meets ROHS3 compliance standards, whereas the original AS03508CO-3 is RoHS non-compliant. RoHS compliance restricts hazardous substances in electrical and electronic equipment. For new designs or procurement in regulated markets, the compliant substitute ensures alignment with environmental and regulatory requirements.

Q: Are there any packaging considerations when ordering the AS03508CO-7-R?

A: The AS03508CO-7-R is supplied in tray packaging, whereas the original part packaging is not specified. Tray packaging is standard for component distribution and is compatible with automated assembly processes. Verify tray quantity and handling requirements with your supplier for production planning purposes.