SA3R-03 Replacement: LCAT1002-03, FMAT7620-3

Original Part

SA3R-03

Fairview Microwave

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

Alternative Part

LCAT1002-03

L-com

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

FMAT7620-3

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. LCAT1002-03 Substitution Conclusion The LCAT1002-03 is fully consistent with the original part SA3R-03 in key electrical parameters (3dB attenuation, 2W power handling, 50Ω impedance) and mechanical interface (SMA In-Line Module). Its operating frequency range (DC-3GHz) is also identical. From a technical performance standpoint, it is therefore a direct replacement. The primary differences lie in the manufacturer change from Fairview Microwave to L-com, which may affect supply chain, availability, pricing, and brand reputation. However, the fundamental functionality and performance specifications are equivalent, making the substitution highly feasible.

2. FMAT7620-3 Substitution Conclusion The FMAT7620-3 is compatible with the original SA3R-03 in terms of attenuation, power rating, impedance, and connector type. Its most significant technical advantage is the substantial extension of the frequency range from DC-3GHz to DC-18GHz. Within the original application up to 3GHz, the FMAT7620-3 fully covers the required performance with ample margin, offering improved high-frequency response and stability. This wider bandwidth capability typically comes at a higher cost. Substitution is entirely feasible and can enhance the system’s high-frequency potential, though it requires evaluation of whether the potential additional cost is justified for frequency performance beyond the original design requirements.

Analysis ID: 5F79-F1ED000

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