LCAT1000-20 Replacement: SA3SR-20, LCAT1006-20

Original Part

LCAT1000-20

L-com

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

Alternative Part

SA3SR-20

Fairview Microwave

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

LCAT1006-20

L-com

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

1. SA3SR-20 Substitution Conclusion The SA3SR-20 is identical to the original LCAT1000-20 part in terms of attenuation value, power handling, impedance, and connector interface. However, its operational frequency range (0–3 GHz) is only half that of the original (0–6 GHz), which constitutes the primary technical distinction. If the application frequency remains within 3 GHz, the SA3SR-20 can serve as a qualified, potentially more cost-effective direct replacement. If the system operates between 3 GHz and 6 GHz, using the SA3SR-20 will result in unguaranteed performance—such as deviation from the nominal attenuation value and degraded VSWR—potentially leading to signal distortion or system instability. Therefore, substitution is not recommended in this scenario.

2. LCAT1006-20 Substitution Conclusion The LCAT1006-20 matches the original LCAT1000-20 in all key parameters, including attenuation value, power rating, impedance, and connector interface. Its operational frequency range (0–18 GHz) fully covers and significantly exceeds the original part’s upper limit of 6 GHz, representing its main technical advantage. Across the entire frequency band of the original part (0–6 GHz), the LCAT1006-20 performs at least equivalently, and typically offers superior high-frequency characteristics—such as flatter frequency response and improved VSWR. Thus, it is an ideal, fully compatible substitute with additional performance margin. The only potential consideration is its generally higher cost, attributable to its wider bandwidth design.

Analysis ID: 2912-1795000

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