SA6H-09 Replacement: AT-109V, M3933/25-35S

Original Part

SA6H-09

Fairview Microwave

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

Alternative Part

AT-109V

Hirose Electric Co Ltd

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

M3933/25-35S

Amphenol SV Microwave

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

1. AT-109V Substitution Conclusion Substitution is feasible, subject to validation of high-frequency application compatibility. The AT-109V is identical to the original part SA6H-09 in key electrical specifications (9 dB attenuation, 50 Ω impedance, 2 W power handling) and mechanical package (SMA straight plug). The primary difference lies in its extended frequency range up to 18 GHz, compared to 6 GHz for the original part. Performance is equivalent below 6 GHz, allowing direct substitution in that band. However, in systems originally designed only for operation up to 6 GHz, the wider bandwidth may introduce unverified high-frequency responses—such as phase nonlinearity or resonance points—that could affect signal integrity. It is necessary to verify in the actual circuit or system that no adverse impact occurs. Additionally, confirm that the connector interface (e.g., plug-jack) is fully gender-compatible with existing cables or ports.

2. M3933/25-35S Substitution Conclusion Substitution is feasible, with attention required to interface details and high-frequency suitability. The M3933/25-35S matches the SA6H-09 in electrical parameters (9 dB, 50 Ω, 2 W) and package style, and similarly offers an extended frequency range to 18 GHz (exceeding the original part’s 6 GHz). The technical distinction again centers on potential high-frequency behavior introduced by the wider bandwidth; performance consistency within the original operating band (≤6 GHz) must be ensured. Furthermore, as a part from a military-specification manufacturer (Amphenol SV Microwave), its interface details—such as pin length and dielectric material—may differ slightly from those of the original commercial-grade part. Before substitution, verify mechanical compatibility and connector gender (the original part uses a plug-jack configuration), and confirm in actual application that no issues arise such as increased signal reflection or reduced power handling.

Analysis ID: 221D-81F6000

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