AT-109V Replacement: SA6-09, FMAT1013

Original Part

AT-109V

Hirose Electric Co Ltd

RF Attenuators 9dB 0 Hz ~ 18 GHz 50 Ohms 2W SMA In-Line Module

Alternative Part

SA6-09

Fairview Microwave

RF Attenuators 9dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

FMAT1013

Fairview Microwave

RF Attenuators 9dB 0 Hz ~ 6 GHz 50 Ohms 2W SMA In-Line Module

1. SA6-09 Substitution Conclusion The SA6-09 can serve as a conditional substitute for the AT-109V. Both parts are identical in key specifications—attenuation value (9dB), power handling (2W), impedance (50Ω), and physical interface (SMA inline)—ensuring fundamental signal processing and mechanical compatibility. The critical difference lies in the operational frequency range: the AT-109V covers DC-18 GHz, whereas the SA6-09 is limited to DC-6 GHz. The SA6-09 is therefore only suitable for applications operating at or below 6 GHz, such as most cellular communications, Wi-Fi 5/6, and conventional microwave links. If the original system operates within the 6-18 GHz band—for instance, in Ku-band satellite communications, high-end test instrumentation, or certain radar bands—using the SA6-09 will result in severe performance degradation or failure. This is due to frequency mismatch causing excessive insertion loss, inaccurate attenuation, and potential signal reflection. Thus, the feasibility of substitution depends entirely on the application frequency.

2. FMAT1013 Substitution Conclusion The FMAT1013, also a Fairview Microwave product, shares an identical substitution conclusion and technical rationale with the SA6-09 regarding the AT-109V. It offers the same 9dB attenuation, 2W power rating, 50Ω impedance, and SMA inline package as the original part, ensuring direct interchangeability in terms of electrical connectivity and power handling capability. The decisive limitation similarly resides in its frequency range: the FMAT1013 has a maximum operating frequency of 6 GHz, significantly lower than the AT-109V's 18 GHz. This part can only be safely and effectively deployed in RF circuits up to 6 GHz as a lower-frequency-domain replacement for the original part. For any application involving signal processing above 6 GHz, the FMAT1013 is unsuitable. Prior to selecting it as a substitute, it is imperative to strictly verify that the system's maximum operating frequency does not exceed its 6 GHz upper limit.

Analysis ID: 079E-2110000

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