SA3SR-20 Replacement: SA26B-20, LCAT1006-20

Original Part

SA3SR-20

Fairview Microwave

RF Attenuators 20dB 0 Hz ~ 3 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

SA26B-20

Fairview Microwave

RF Attenuators 20dB 0 Hz ~ 26 GHz 50 Ohms 2W SMA In-Line Module

LCAT1006-20

L-com

RF Attenuators 20dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

1. SA26B-20 Substitution Conclusion The SA26B-20 can fully replace the original part SA3SR-20, as both share identical key parameters—attenuation (20 dB), power rating (2 W), impedance (50 Ω), and package (SMA In-Line Module)—ensuring electrical and mechanical compatibility. The difference lies in the frequency range: the SA26B-20 supports 0 Hz to 26 GHz, whereas the SA3SR-20 covers only 0 Hz to 3 GHz. Within the original application scenario (≤3 GHz), the SA26B-20 performs equivalently while offering wider bandwidth capability, providing additional margin for higher‑frequency applications. Since both are designed by the same manufacturer, reliability is consistent, and no circuit adjustments are required after substitution.

2. LCAT1006-20 Substitution Conclusion The LCAT1006-20 is a viable technical substitute for the original SA3SR-20, as its attenuation, power rating, impedance, and package all match. Differences include the frequency range (0 Hz–18 GHz vs. 0 Hz–3 GHz) and the manufacturer (L‑com vs. Fairview Microwave). The wider frequency range of the LCAT1006-20 ensures performance compatibility at ≤3 GHz and extends usability to higher frequencies. However, note that the change in manufacturer may introduce subtle performance variations—such as insertion‑loss drift or temperature stability—so compatibility verification in the actual application is recommended to ensure system consistency.

Analysis ID: 92E1-8767000

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