LCAT1000-20 Replacement: AT-120V, M3933/14-04S

Original Part

LCAT1000-20

L-com

RF Attenuators 20dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

AT-120V

Hirose Electric Co Ltd

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

M3933/14-04S

Amphenol SV Microwave

RF Attenuators 20dB 0 Hz ~ 12.4 GHz 50 Ohms 2W SMA In-Line Module

1. AT-120V Substitution Conclusion The AT-120V can fully replace the LCAT1000-20, as its key parameters—attenuation value (20 dB), power rating (2 W), impedance (50 Ω), and connector type—are identical. Moreover, its critical performance is superior: the frequency range extends to 0–18 GHz, significantly higher than the original part’s 6 GHz limit. The AT-120V maintains stable attenuation characteristics even at higher frequency bands (e.g., microwave communications, radar systems), whereas the original part may degrade beyond 6 GHz. The broader bandwidth also reduces replacement risk during system frequency upgrades, making it suitable for high‑frequency applications or future expansion needs.

2. M3933/14-04S Substitution Conclusion The M3933/14-04S is also a viable substitute. Its basic specifications—20 dB attenuation, 2 W power handling, 50 Ω impedance, and SMA interface—match those of the original part. The primary improvement is its extended frequency range of 0–12.4 GHz, outperforming the original part’s 6 GHz limit. This part provides reliable attenuation performance across the 6–12.4 GHz band, covering a wider range of wireless applications (e.g., satellite communications, high‑frequency testing). In contrast, the original part may introduce insertion‑loss deviation or degraded VSWR in this frequency range. However, if the actual operating frequency does not exceed 6 GHz, there will be no significant performance difference between the two.

Analysis ID: DA92-7049000

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