SA18N5WA-03 Replacement: SA6N5W-03, SA3N5W-03

Original Part

SA18N5WA-03

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 18 GHz 50 Ohms 5W N-Type In-Line Module

Alternative Part

SA6N5W-03

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 6 GHz 50 Ohms 5W N-Type In-Line Module

SA3N5W-03

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 3 GHz 50 Ohms 5W N-Type In-Line Module

1. SA6N5W-03 Substitution Conclusion The SA6N5W-03 can partially replace the original component, but its frequency range (0–6 GHz) is only one‑third that of the original part (0–18 GHz). In applications above 6 GHz up to 18 GHz, this attenuator cannot guarantee key performance parameters such as attenuation accuracy and VSWR, which may lead to signal distortion or system failure. Therefore, it is only suitable for low‑frequency scenarios where the operating frequency is confirmed not to exceed 6 GHz.

2. SA3N5W-03 Substitution Conclusion The SA3N5W-03 has limited substitution capability for the original part due to its significantly narrower frequency range (0–3 GHz) compared to the original (0–18 GHz). Above 3 GHz—such as in common C‑band or Ku‑band applications—this attenuator may introduce uncontrolled insertion loss or impedance mismatch, severely degrading high‑frequency system performance. Consequently, it should only be used in low‑frequency testing or simple circuits where frequency response is not critical.

Analysis ID: D19D-35CA000

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