SA3R-20 Replacement: 32AS102-K20S3, FMAT7466-20

Original Part

SA3R-20

Fairview Microwave

RF Attenuators 20dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

32AS102-K20S3

Rosenberger

RF Attenuators 20dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

FMAT7466-20

Fairview Microwave

RF Attenuators 20dB 0 Hz ~ 12 GHz 50 Ohms 2W SMA In-Line Module

1. 32AS102-K20S3 Substitution Conclusion The 32AS102-K20S3 can serve as a full replacement for the original SA3R-20, as both share identical key electrical parameters (20 dB attenuation, 2 W power rating, 50 Ω impedance) and mechanical packaging (SMA in‑line module), ensuring functional and interface compatibility. The difference lies in the frequency range: the 32AS102-K20S3 supports 0 Hz to 18 GHz, whereas the original part is rated only for 0 Hz to 3 GHz. The substitute offers a wider operational bandwidth at higher frequencies, which is backward compatible for the original application (≤3 GHz) and does not compromise performance. In fact, it provides additional frequency margin and flexibility for future system upgrades. However, note that the broader frequency range may come at a slightly higher cost, and sourcing from a different manufacturer (Rosenberger vs. Fairview Microwave) may require additional verification of supply‑chain stability and lot‑to‑lot consistency.

2. FMAT7466-20 Substitution Conclusion The FMAT7466-20 can seamlessly replace the original SA3R-20, as both have the same attenuation, power rating, impedance, package type, and are from the same manufacturer (Fairview Microwave), ensuring parameter alignment and supply‑chain synergy. The difference is in frequency range: the FMAT7466-20 covers 0 Hz to 12 GHz, while the original is specified for 0 Hz to 3 GHz. The replacement maintains identical performance within the original 3 GHz band while extending high‑frequency capability, making it suitable for broader RF applications such as future signal‑processing scenarios that may involve higher frequencies. Nevertheless, it is advisable to evaluate whether the actual application benefits from the extended bandwidth, as over‑specification may marginally increase cost. The common manufacturer source, however, simplifies compatibility verification and replacement procedures.

Analysis ID: 0D87-8133000

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