AT-307(40) RF Attenuator 7dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-307(40) is a 7dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation in 50-ohm RF systems operating from DC to 18 GHz with 1W power handling capability. The part features an SMA connector interface and is packaged as an in-line module. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new design implementations where the original part is no longer available from the manufacturer.

Substiute Parts

AT-307(40)

Hirose Electric Co LtdIn Stock: 898AT-307(40) Datasheet

Current PartRFQ

6807.19.A

Huber+Suhner, Inc.In Stock: 10756807.19.A Datasheet

Parametric EquivalentRFQ

CATTEN-07R0

Crystek CorporationIn Stock: 1204CATTEN-07R0 Datasheet

Parametric EquivalentRFQ

R411807124

Radiall USA, Inc.In Stock: 1049R411807124 Datasheet

Parametric EquivalentRFQ

R413307000

Radiall USA, Inc.In Stock: 995R413307000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT-307(40) are qualified based on the following critical parameters that determine functional equivalence:

• Attenuation Value: Must be 7dB (exact match required)
• Impedance: Must be 50 Ohms (exact match required)
• Power Rating: Must be 1W minimum
• Package / Case: Must be SMA In-Line Module (exact match required)
• Frequency Range: Must support the operating bandwidth of the application

Three parametric equivalent parts meet these core substitution criteria. Frequency range variations exist among substitutes, which affects application suitability. All substitute parts maintain the same attenuation, impedance, power rating, and physical package as the original AT-307(40).

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are parametrically equivalent to the AT-307(40) based on attenuation value, impedance, power rating, and physical package. Selection among substitutes depends on application frequency requirements:

6807.19.A (Huber+Suhner, Inc.) provides the closest frequency range match to the original part, supporting 0 Hz ~ 18 GHz operation. This part is currently in active production status and is recommended for applications requiring the full 18 GHz bandwidth of the original AT-307(40).

R413307000 (Radiall USA, Inc.) extends frequency coverage to 40 GHz, suitable for applications requiring extended high-frequency performance beyond the original specification.

CATTEN-07R0 (Crystek Corporation) and R411807124 (Radiall USA, Inc.) have reduced frequency ranges (3 GHz and 4 GHz respectively) and are suitable only for applications operating within these bandwidth limitations.

All active substitute parts are currently available in inventory and carry appropriate compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can I use CATTEN-07R0 or R411807124 as direct replacements for AT-307(40)?

A: These parts are parametrically equivalent for attenuation, impedance, power rating, and package type. However, their frequency ranges are limited to 3 GHz and 4 GHz respectively, compared to the original 18 GHz specification. Use these substitutes only if your application operates within their frequency limitations.

Q: Which substitute provides the best compatibility with the original AT-307(40)?

A: The 6807.19.A from Huber+Suhner, Inc. matches the original frequency range of 0 Hz ~ 18 GHz while maintaining all other electrical and mechanical parameters. This part is the most direct functional equivalent.

Q: Are all substitute parts RoHS compliant?

A: CATTEN-07R0 and R411807124 are ROHS3 compliant. The 6807.19.A is REACH unaffected. Compliance status varies by substitute; verify requirements for your specific application and region.

Q: What is the physical compatibility of these substitute parts?

A: All substitute parts use the SMA In-Line Module package, ensuring mechanical compatibility with the original AT-307(40) in standard SMA connector applications.

Q: Are these parts currently available?

A: Yes. All four substitute parts are listed as active products with current inventory availability ranging from 931 to 1098 pieces in stock.