WM-55D103 Equivalent & Substitute Parts

Part Overview

The WM-55D103 is an electret condenser microphone manufactured by Panasonic Electronic Components, designed for analog noise-cancelling applications. This component operates across a frequency range of 100 Hz to 10 kHz with a sensitivity rating of -54dB ±4dB at 94dB SPL. The part features solder pad termination and a circular form factor with 0.382" diameter.

The WM-55D103 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and maintenance applications.

Substiute Parts

WM-55D103

Panasonic Electronic ComponentsIn Stock: 720WM-55D103 Datasheet

Current PartRFQ

ANM-5054L-2-R

PUI Audio, Inc.In Stock: 1539ANM-5054L-2-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WM-55D103 is determined by strict alignment of the following critical parameters:

• Microphone type: Electret Condenser
• Output configuration: Analog
• Directional characteristic: Noise Cancelling
• Sensitivity specification: -54dB ±4dB
• Impedance: 680 Ohms
• Voltage range: 1.5 V ~ 10 V
• Supply current: 500 µA
• Termination method: Solder Pads
• Physical form factor: Circular, 0.382" diameter
• Port location: Top

The ANM-5054L-2-R from PUI Audio, Inc. meets all critical substitution criteria and is classified as an active product with current manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

The ANM-5054L-2-R is a direct functional equivalent to the obsolete WM-55D103. Both components share identical electrical specifications for sensitivity, impedance, voltage range, and supply current. Physical dimensions are compatible, with the substitute part height differing by 0.008" (0.20mm), which remains within typical PCB assembly tolerances.

The ANM-5054L-2-R carries active product status with current manufacturing availability, eliminating obsolescence risk. The substitute part is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The S/N ratio of the substitute (55dB) is 3dB lower than the original part (58dB), representing a minor performance variance within acceptable engineering margins for noise-cancelling microphone applications.

Frequently Asked Questions (FAQ)

Q: Can the ANM-5054L-2-R be used as a direct replacement for the WM-55D103?

A: Yes. Both components are electret condenser microphones with identical sensitivity (-54dB ±4dB), impedance (680 Ohms), voltage range (1.5 V ~ 10 V), and supply current (500 µA). Solder pad termination and circular form factor are identical. Physical height differs by 0.008", which is compatible with standard PCB assembly processes.

Q: What is the significance of the S/N ratio difference?

A: The WM-55D103 specifies 58dB S/N ratio, while the ANM-5054L-2-R specifies 55dB. This 3dB difference represents a minor variance in noise floor performance. Both values are within acceptable ranges for analog noise-cancelling microphone applications.

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

A: The ANM-5054L-2-R is ROHS3 compliant and REACH unaffected. The WM-55D103 compliance status is not specified in the provided data. Both parts carry MSL 1 (Unlimited) moisture sensitivity classification.

Q: What is the availability status of each part?

A: The WM-55D103 is classified as obsolete. The ANM-5054L-2-R is an active product with current manufacturing status, ensuring long-term supply chain continuity.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: Yes. Both parts share identical diameter (0.382" / 9.70mm) and port location (top). Maximum height differs by 0.008" (0.20mm), which is negligible for standard PCB assembly and does not require layout modifications.