FMAT7620-3 Replacement: M3933/30-07S, 32AS102-K03S3

Original Part

FMAT7620-3

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

M3933/30-07S

Amphenol SV Microwave

RF Attenuators 3dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

32AS102-K03S3

Rosenberger

RF Attenuators 3dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. M3933/30-07S Substitution Conclusion From a core electrical parameter standpoint, the M3933/30-07S is a fully compatible substitute for the original part. Its attenuation value (3 dB), impedance (50 Ω), power rating (2 W), and connector interface (SMA In-Line Module) are identical to those of the FMAT7620-3, ensuring direct functional compatibility. The key difference lies in the frequency range: the M3933/30-07S supports 0–32 GHz, which is significantly wider than the original part's 0–18 GHz. Within the original design's operating band of up to 18 GHz, the substitute provides equivalent performance. Moreover, its wider bandwidth offers improved high-frequency response and phase consistency in broadband applications. This typically indicates superior internal design and materials (e.g., resistor chips, substrates) for high-frequency operation, making it a "higher-spec" replacement. Provided the mechanical footprint is compatible, the substitution is feasible and performance is assured.

2. 32AS102-K03S3 Substitution Conclusion The 32AS102-K03S3 is a direct parametric equivalent to the original part in terms of nominal specifications. Its attenuation, impedance, power rating, frequency range (0–18 GHz), and connector interface are identical to those of the FMAT7620-3. In most applications, there will be no discernible difference in fundamental RF performance—attenuation, power handling, and operational bandwidth. Differences are implicit in the manufacturer and part number, typically reflected in unlisted critical parameters such as voltage standing wave ratio (VSWR), attenuation accuracy (tolerance), temperature stability, and phase linearity. While the macro parameters match, in applications with stringent requirements for system matching precision, signal integrity, or environmental stability, direct substitution may introduce subtle performance deviations. Prototype testing and validation are recommended to ensure system-level requirements are met. For general-purpose applications, this part is a suitable substitute.

Analysis ID: CFBE-9664000

Based on part parameters and for reference only. Not to be used for procurement or production.