M3933/25-34S Replacement: FMAT7466-8, FMAT7467-8

Original Part

M3933/25-34S

Amphenol SV Microwave

RF Attenuators 8dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

FMAT7466-8

Fairview Microwave

RF Attenuators 8dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

FMAT7467-8

Fairview Microwave

RF Attenuators 8dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

1. FMAT7466-8 Substitution Conclusion The FMAT7466-8 can serve as a conditional substitute for the original part number M3933/25-34S. Both parts share identical core specifications: 8 dB attenuation, 50 Ω impedance, 2 W power handling, and SMA package. However, a critical difference exists: the FMAT7466-8 has a frequency range of 0-12 GHz, whereas the original part is rated for 0-18 GHz. If your application operates below 12 GHz, this part provides equivalent attenuation performance. For systems utilizing the 12-18 GHz band, this substitute is unsuitable. In this higher frequency range, it will fail to pass the signal properly, likely causing severe signal reflection, and is therefore not a viable replacement.

2. FMAT7467-8 Substitution Conclusion The situation for the FMAT7467-8 is identical to that of the FMAT7466-8. It can also be a conditional substitute for the original M3933/25-34S. Its technical specifications (8dB, 50Ω, 2W, SMA, 0-12 GHz) are exactly the same as the FMAT7466-8. The primary deviation from the original part, again, is the reduced upper frequency limit of 12 GHz instead of 18 GHz. Substitutability hinges entirely on the application's operational frequency band. Direct replacement is only feasible for operation within 0-12 GHz. Any signal exceeding 12 GHz will not be properly attenuated, which risks damaging downstream sensitive circuitry. Consequently, it is not recommended for high-frequency applications in the 12-18 GHz range.

Analysis ID: 0E70-2C93000

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