RF Attenuator AT-108(40) Equivalent & Substitute Parts

Part Overview

The AT-108(40) is an RF attenuator manufactured by Hirose Electric Co Ltd, designed for RF signal attenuation applications requiring 8dB reduction across a broad frequency range of 0 Hz to 18 GHz. This in-line module operates at 50 Ohms impedance with 1W power handling capability and features SMA connectors for direct integration into RF systems. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts is necessary to ensure continued availability and system compatibility for new designs or replacement requirements.

Substiute Parts

AT-108(40)

Hirose Electric Co LtdIn Stock: 937AT-108(40) Datasheet

Current PartRFQ

6808.19.A

Huber+Suhner, Inc.In Stock: 10486808.19.A Datasheet

Parametric EquivalentRFQ

CATTEN-08R0

Crystek CorporationIn Stock: 794CATTEN-08R0 Datasheet

Parametric EquivalentRFQ

R411808124

Radiall USA, Inc.In Stock: 1045R411808124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT-108(40) are qualified based on matching the following critical parameters: 8dB attenuation value, 50 Ohm impedance, 1W power rating, and SMA in-line module package configuration. All substitute parts listed maintain these core electrical and mechanical specifications. Frequency range variations exist among substitutes and must be evaluated against specific application requirements. All substitute parts maintain RoHS or equivalent environmental compliance status.

Parameter Comparison

Engineering Selection Recommendations

The 6808.19.A from Huber+Suhner provides the closest functional match to the AT-108(40), maintaining identical frequency range coverage of 0 Hz to 18 GHz while meeting all core electrical specifications. This part is currently in Active production status and carries REACH Unaffected compliance designation.

The CATTEN-08R0 from Crystek and R411808124 from Radiall USA are functionally equivalent for applications operating within their respective frequency ranges of 0 Hz to 3 GHz and 0 Hz to 4 GHz. Both parts maintain Active production status and full environmental compliance certifications. Selection between these options depends on the maximum operating frequency required by the application.

All substitute parts maintain the 8dB attenuation, 50 Ohm impedance, 1W power rating, and SMA in-line module package configuration necessary for direct functional replacement.

Frequently Asked Questions (FAQ)

Q: Can the CATTEN-08R0 substitute for the AT-108(40) in all applications?

A: The CATTEN-08R0 is functionally equivalent for applications operating at frequencies up to 3 GHz. Applications requiring operation above 3 GHz must use either the 6808.19.A or R411808124, depending on the maximum frequency requirement.

Q: What is the primary difference between the substitute parts?

A: The primary difference is frequency range coverage. The 6808.19.A matches the original AT-108(40) with 0 Hz to 18 GHz coverage. The R411808124 extends to 4 GHz, and the CATTEN-08R0 extends to 3 GHz. All other electrical and mechanical parameters remain identical.

Q: Are all substitute parts physically compatible with existing SMA connectors?

A: Yes. All substitute parts use the SMA in-line module package configuration, ensuring mechanical compatibility with standard SMA connector systems.

Q: Why is the AT-108(40) marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. Substitute parts in Active production status provide continued availability for new designs and replacement requirements.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All substitute parts carry either RoHS Compliant or RoHS3 Compliant designations, or REACH Unaffected status, meeting current environmental compliance standards.