1. LCAT1006-03 Substitution Conclusion The LCAT1006-03 is identical to the original LCAT1002-03 in all key parameters (attenuation value, impedance, power rating, and interface). However, its frequency range (DC-18 GHz) significantly exceeds the original part's DC-3 GHz specification. Electrically, the LCAT1006-03 fully covers and surpasses the performance of the original part, maintaining the specified 3dB attenuation accuracy and 2W power handling up to 18 GHz, whereas the original part is only guaranteed to 3 GHz. From a purely technical performance standpoint, the LCAT1006-03 is a perfect drop-in replacement, even providing headroom for potential future high-frequency applications. The only consideration is that its wider bandwidth design may result in a slightly higher cost.