2. LCAT1005-10 Substitution Conclusion The LCAT1005-10 also presents a feasible substitution for the original LCAT1000-10 based on its nominal key parameters. Its official description and specifications (10 dB, DC–18 GHz, 2 W, 50 Ω, SMA) are identical to those of the LCAT1006-10. Per the datasheet, it similarly offers an extended frequency range over the original part. Despite the identical specifications, the LCAT1005-10 is a distinct part number from the LCAT1006-10, which typically indicates potential subtle differences in non‑specified characteristics or internal design. These may include the type/manufacturer of the resistive chip, internal circuit layout, lot‑to‑lot performance consistency (e.g., attenuation flatness, VSWR), or minor mechanical variations. While electrically compatible for substitution, to ensure full system performance consistency and repeatability, it is advisable to treat the LCAT1005-10 as a “substitution candidate requiring verification.” Before committing to volume replacement, comparative testing of key performance parameters should be conducted in the actual circuit or system.