MB4015ASC-1 Equivalent & Substitute Parts

Part Overview

The MB4015ASC-1 is an electret condenser microphone manufactured by Knowles, designed for analog audio capture applications requiring omnidirectional pickup patterns. This component operates across a 2 V to 10 V supply range with a sensitivity of -42dB ±3dB at 94dB SPL and a frequency response of 100 Hz to 10 kHz. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

MB4015ASC-1

KnowlesIn Stock: 1033MB4015ASC-1 Datasheet

Current PartRFQ

TOM-1545L-R

PUI Audio, Inc.In Stock: 751TOM-1545L-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MB4015ASC-1 is determined by strict alignment with the following core parameters:

• Microphone type: Electret condenser
• Output configuration: Analog
• Directional pattern: Omnidirectional
• Physical form factor: Circular, 0.157" diameter (4.00mm), 0.067" maximum height
• Termination method: Solder pads
• Electrical interface: 2 V to 10 V supply voltage range, 500 µA supply current, 2.2 kOhms impedance
• Port orientation: Top-mounted

The TOM-1545L-R from PUI Audio, Inc. meets all mandatory substitution criteria. While this substitute exhibits extended frequency response (20 Hz to 20 kHz versus 100 Hz to 10 kHz) and improved sensitivity specification (-45dB ±3dB versus -42dB ±3dB), these represent performance enhancements rather than incompatibilities. The identical physical dimensions, electrical interface parameters, and termination method ensure direct mechanical and electrical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The TOM-1545L-R is the designated manufacturer-recommended substitute for the obsolete MB4015ASC-1. Selection of this alternative is supported by the following engineering factors:

• Active product status ensures ongoing availability and supply chain continuity
• RoHS3 compliance and REACH unaffected status align with current regulatory requirements
• Identical mechanical footprint and electrical interface enable direct board-level substitution without redesign
• Enhanced performance specifications (extended frequency response, improved signal-to-noise ratio) provide operational margin without introducing incompatibility

Frequently Asked Questions (FAQ)

Q: Can the TOM-1545L-R be used as a direct replacement for the MB4015ASC-1 without circuit modifications?

A: Yes. Both components share identical physical dimensions (0.157" diameter, 0.067" maximum height), solder pad termination, impedance (2.2 kOhms), and voltage operating range (2 V to 10 V). No circuit modifications are required for substitution.

Q: How do the frequency response specifications differ between these parts?

A: The MB4015ASC-1 operates across 100 Hz to 10 kHz, while the TOM-1545L-R extends to 20 Hz to 20 kHz. This represents an expansion of the usable frequency range in the substitute part. Applications limited to the original 100 Hz to 10 kHz band will operate within the TOM-1545L-R's specified range.

Q: What is the significance of the sensitivity difference between -42dB and -45dB?

A: The TOM-1545L-R sensitivity specification of -45dB ±3dB indicates a 3dB lower output level compared to the MB4015ASC-1 at -42dB ±3dB. This represents a factor of approximately 1.4 in voltage output. Circuit gain adjustment may be necessary to maintain equivalent signal levels in the receiving electronics.

Q: Are there compliance or regulatory differences between these components?

A: The TOM-1545L-R carries RoHS3 compliance certification, while the MB4015ASC-1 does not specify this status. Both components are REACH unaffected and carry identical ECCN and HTSUS classifications.

Q: What is the packaging difference between these parts?

A: The MB4015ASC-1 is supplied in standard packaging, while the TOM-1545L-R is available in bulk packaging. This distinction affects procurement and handling procedures but does not impact component functionality or electrical performance.