53AS105-K03N3 Replacement: SA18N5WA-03, SA3N5W-03

Original Part

53AS105-K03N3

Rosenberger

RF Attenuators 3dB 0 Hz ~ 10 GHz 50 Ohms 5W N-Type In-Line Module

Alternative Part

SA18N5WA-03

Fairview Microwave

RF Attenuators 3dB 0 Hz ~ 18 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. SA18N5WA-03 Substitution Conclusion The SA18N5WA-03 is a fully qualified substitute for the original part 53AS105-K03N3. Both components are identical in terms of attenuation value (3 dB), power handling (5 W), impedance (50 Ω), and connector interface (N-type feedthrough module). However, the SA18N5WA-03 offers a significantly wider frequency range (0–18 GHz) compared to the original part's 0–10 GHz. It maintains performance across the extended high-frequency band, providing broader compatibility. This makes it suitable for applications requiring frequency expansion or potential future upgrades to higher frequencies, with no additional risk introduced by insufficient frequency coverage.

2. SA3N5W-03 Substitution Conclusion The SA3N5W-03 is not a viable direct replacement for the original part 53AS105-K03N3. While both share the same attenuation, power rating, impedance, and connector type, the SA3N5W-03 has a much narrower frequency range (0–3 GHz) compared to the original's 0–10 GHz. Above 3 GHz, the SA3N5W-03 may fail to operate effectively, potentially leading to signal distortion, increased reflection, or degraded performance. Therefore, it is only suitable for low-frequency applications and cannot cover the full bandwidth required by the original design.

Analysis ID: 587D-FD48000

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