AT-308(40) RF Attenuator Equivalent & Substitute Parts

Part Overview

The AT-308(40) is an RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation applications across a broad frequency range. This part operates at 8dB attenuation with 50 Ohm impedance and 1W power handling capability in an SMA connector configuration. The product is designated as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure continued availability for system maintenance, design updates, and procurement flexibility.

Substiute Parts

AT-308(40)

Hirose Electric Co LtdIn Stock: 723AT-308(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

Substitution eligibility for the AT-308(40) is determined by matching the following critical parameters: attenuation value (8dB), impedance (50 Ohms), power rating (1W), and package type (SMA In-Line Module). All identified substitute parts meet these core electrical and mechanical requirements. Frequency range variations exist among substitutes and must be evaluated against specific application requirements. Compliance certifications (RoHS, REACH, ECCN) are provided for regulatory assessment but do not restrict substitution at the component level.

Parameter Comparison

Engineering Selection Recommendations

The 6808.19.A from Huber+Suhner, Inc. provides the closest parametric match to the AT-308(40), with identical frequency range coverage (0 Hz ~ 18 GHz) and Active product status, ensuring long-term availability. This part is recommended as the primary substitute for applications requiring full frequency range compatibility.

The CATTEN-08R0 from Crystek Corporation and R411808124 from Radiall USA, Inc. are functionally equivalent for applications operating within their respective frequency ranges (0 Hz ~ 3 GHz and 0 Hz ~ 4 GHz). Both parts maintain Active status and are suitable for narrowband or lower-frequency applications. Selection between these options depends on specific frequency requirements and procurement lead times.

All substitute parts are available in production quantities and carry appropriate compliance certifications (RoHS, REACH, ECCN) consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can CATTEN-08R0 be used as a direct replacement for AT-308(40)?

A: CATTEN-08R0 is electrically equivalent for attenuation, power, impedance, and package type. However, its frequency range is limited to 0 Hz ~ 3 GHz compared to the AT-308(40) range of 0 Hz ~ 18 GHz. Use this substitute only in applications operating within the 0 Hz ~ 3 GHz band.

Q: What is the difference between the substitute parts?

A: All substitutes share identical attenuation (8dB), power rating (1W), impedance (50 Ohms), and SMA In-Line Module packaging. The primary difference is frequency range: 6808.19.A covers 0 Hz ~ 18 GHz (matching the original), while CATTEN-08R0 and R411808124 are limited to 0 Hz ~ 3 GHz and 0 Hz ~ 4 GHz respectively.

Q: Is the 6808.19.A a pin-for-pin replacement?

A: Yes. The 6808.19.A maintains identical SMA In-Line Module packaging and electrical specifications, enabling direct substitution without circuit modification.

Q: Are there compliance differences between the main part and substitutes?

A: All parts carry RoHS compliance or equivalent environmental certifications. REACH status varies (Unaffected for substitutes, Compliant for the original). ECCN classification is consistent across all parts (EAR99). Verify specific compliance requirements for your application and region.

Q: Which substitute offers the best long-term availability?

A: The 6808.19.A from Huber+Suhner, Inc. carries Active product status with 949 units in stock, providing the most reliable long-term supply option.