SA3SR-10 Replacement: M3933/30-21S, 32AS102-K10S3

Original Part

SA3SR-10

Fairview Microwave

RF Attenuators 10dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

M3933/30-21S

Amphenol SV Microwave

RF Attenuators 10dB 0 Hz ~ 32 GHz 50 Ohms 2W SMA In-Line Module

32AS102-K10S3

Rosenberger

RF Attenuators 10dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. M3933/30-21S Substitution Conclusion From a core electrical parameter standpoint, the M3933/30-21S is a fully viable substitute for the original SA3SR-10. Both components share identical key specifications: attenuation (10dB), impedance (50Ω), rated power (2W), and connector interface (SMA In-Line Module). This ensures performance equivalence within the original design bandwidth of 0-3 GHz. The primary difference lies in the frequency range: the M3933/30-21S offers a significantly wider bandwidth (0-32 GHz versus 0-3 GHz). This indicates superior high-frequency performance, likely due to more refined internal design and materials, which typically comes at a higher cost. For applications originally operating only below 3 GHz, this discrepancy does not introduce any negative impact. Instead, it provides additional performance headroom. Therefore, the substitution is technically and functionally sound, though a cost-benefit assessment is required.

2. 32AS102-K10S3 Substitution Conclusion The 32AS102-K10S3 serves as a functionally acceptable substitute for the original SA3SR-10. Its critical parameters—10dB attenuation, 50Ω impedance, 2W power rating, and SMA in-line module form factor—align perfectly with the original requirements. This guarantees equivalent attenuation and power handling within the target 0-3 GHz band. Similar to the first case, the deviation from the original part is in the frequency range (0-18 GHz versus 0-3 GHz). This denotes a broader operational bandwidth and enhanced high-frequency characteristics for the substitute. While this offers no direct performance benefit for the original low-frequency application, it does not cause performance degradation either. Substitution is feasible from an electrical performance perspective. However, it is necessary to evaluate the potential cost increase associated with the extended bandwidth and to verify complete mechanical dimensional compatibility.

Analysis ID: 93F0-A884000

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