SMS-1508MS-R Equivalent & Substitute Parts

Part Overview

The SMS-1508MS-R is an 8 Ohm general purpose speaker manufactured by PUI Audio, Inc., rated for 500 mW power handling with 87 dB sound pressure level (SPL) efficiency. The device features a top-mounted square port configuration with polyimide cone and samarium cobalt magnet construction, operating across a 500 Hz to 10 kHz frequency range. This part is currently listed as obsolete, necessitating identification of active equivalent alternatives for ongoing design and procurement requirements.

Substiute Parts

SMS-1508MS-R

PUI Audio, Inc.In Stock: 954SMS-1508MS-R Datasheet

Current PartRFQ

SMS-1308MS-2-R

PUI Audio, Inc.In Stock: 5592SMS-1308MS-2-R Datasheet

SimilarRFQ

SMS-1508MS-2-R

PUI Audio, Inc.In Stock: 14792SMS-1508MS-2-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMS-1508MS-R are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Impedance: 8 Ohms (electrical interface requirement)
• Port Location: Top (mechanical mounting requirement)
• Shape: Square (form factor requirement)
• Termination: Solder Pads (assembly interface requirement)
• Material - Cone: Polyimide (PI) (acoustic performance characteristic)
• Material - Magnet: SmCo (performance characteristic)

Secondary Compatibility Parameters:

• Height - Seated (Max): 4.00mm (spatial constraint)
• Frequency Range: Must support audio spectrum requirements
• Power Rating: Must meet or exceed application power demands

Two substitute parts meet these criteria and are available as active alternatives.

Parameter Comparison

Engineering Selection Recommendations

SMS-1508MS-2-R is the direct functional equivalent to SMS-1508MS-R. Both parts share identical electrical specifications (500 mW rated power, 87 dB SPL), frequency response (500 Hz ~ 10 kHz), and mechanical form factor (15.00mm x 15.00mm). The SMS-1508MS-2-R is currently in active production status with ROHS3 compliance certification, making it the primary replacement for obsolete SMS-1508MS-R applications without design modification.

SMS-1308MS-2-R is a compatible alternative for applications where increased power handling and higher efficiency are acceptable. This part operates at 700 mW rated power with 88 dB SPL efficiency and extends frequency response to 20 kHz. The reduced footprint (13.00mm x 13.00mm) requires verification of available mounting space. This option is suitable for designs where higher acoustic output or extended high-frequency response provides functional benefit.

Both substitute parts maintain identical impedance (8 Ohms), port location (top), shape (square), cone material (polyimide), magnet material (SmCo), and termination method (solder pads), ensuring electrical and mechanical compatibility within the SMS series architecture.

Frequently Asked Questions (FAQ)

Q: Can SMS-1508MS-2-R directly replace SMS-1508MS-R without circuit modification?

A: Yes. SMS-1508MS-2-R maintains identical electrical specifications (8 Ohms impedance, 500 mW rated power, 87 dB SPL) and mechanical form factor (15.00mm x 15.00mm, 4.00mm height). No circuit or PCB layout changes are required.

Q: What is the primary difference between SMS-1508MS-2-R and SMS-1308MS-2-R?

A: SMS-1308MS-2-R features increased power handling (700 mW vs. 500 mW), higher efficiency (88 dB vs. 87 dB), and extended frequency response (1.1 kHz ~ 20 kHz vs. 500 Hz ~ 10 kHz). The footprint is reduced to 13.00mm x 13.00mm, requiring verification of available PCB space.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both SMS-1308MS-2-R and SMS-1508MS-2-R carry ROHS3 compliance certification. The original SMS-1508MS-R does not specify RoHS status.

Q: What packaging format is available for substitute parts?

A: Both SMS-1308MS-2-R and SMS-1508MS-2-R are supplied in Tape & Reel (TR) packaging format, suitable for automated assembly processes.

Q: Can SMS-1308MS-2-R be used in space-constrained applications?

A: SMS-1308MS-2-R occupies a smaller footprint (13.00mm x 13.00mm vs. 15.00mm x 15.00mm). Verify that the reduced dimensions accommodate your mechanical design constraints and that increased power handling does not introduce thermal or acoustic considerations requiring design adjustment.

Q: Are the self-resonant frequencies compatible between parts?

A: Self-resonant frequencies differ: SMS-1508MS-R and SMS-1508MS-2-R operate at 800 Hz, while SMS-1308MS-2-R operates at 1100 Hz. Applications with specific acoustic tuning requirements should account for this parameter difference.