RF Attenuator AT-310(40) Equivalent & Substitute Parts

Part Overview

The AT-310(40) is a 10dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for RF signal conditioning applications across 0 Hz to 18 GHz frequency range. This component features 50 Ohm impedance, 1W power handling capability, and SMA in-line module packaging. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Attenuation Value	10dB
Frequency Range	0 Hz ~ 18 GHz
Power Rating	1W
Impedance	50 Ohms
Package Type	SMA In-Line Module
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT-310(40) is determined by the following critical parameters: attenuation value (10dB), impedance (50 Ohms), power rating (1W), and package type (SMA In-Line Module). Frequency range compatibility is evaluated on an application-specific basis, as substitute parts may operate across different frequency bands while maintaining the core electrical specifications.

The substitute parts are grouped into two categories:

Full-Range Equivalents (0 Hz ~ 18 GHz or higher): Parts meeting or exceeding the original frequency specification with identical attenuation and impedance values.

Frequency-Limited Substitutes (0 Hz ~ 6 GHz or 0 Hz ~ 3 GHz): Parts with identical electrical specifications but reduced frequency range, suitable for applications operating within their specified bandwidth.

Attenuation Tolerance Variants: Parts with attenuation values within acceptable engineering tolerance (±1dB) for non-critical applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation (dB)	Frequency Range	Power (W)	Impedance (Ω)	Package	Product Status	RoHS Status
AT-310(40)	Hirose Electric Co Ltd	10	0 Hz ~ 18 GHz	1	50	SMA In-Line Module	Last Time Buy	RoHS Compliant
AT-110-WP1(40)	Hirose Electric Co Ltd	10	0 Hz ~ 18 GHz	1	50	SMA In-Line Module	Active	RoHS Compliant
6810.19.A	Huber+Suhner, Inc.	10	0 Hz ~ 18 GHz	1	50	SMA In-Line Module	Active	REACH Unaffected
CATTEN-0100	Crystek Corporation	10	0 Hz ~ 3 GHz	1	50	SMA In-Line Module	Active	ROHS3 Compliant
R411810124	Radiall USA, Inc.	10	0 Hz ~ 6 GHz	1	50	SMA In-Line Module	Active	ROHS3 Compliant
R411811124	Radiall USA, Inc.	11	0 Hz ~ 6 GHz	1	50	SMA In-Line Module	Active	ROHS3 Compliant
R413V10000	Radiall USA, Inc.	10	0 Hz ~ 67 GHz	1	50	SMA In-Line Module	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Identical Specifications):

AT-110-WP1(40) from Hirose Electric Co Ltd is the direct equivalent, offering identical electrical and mechanical specifications with Active product status. This part maintains full compatibility with the AT-310(40) across the complete 0 Hz to 18 GHz frequency range.

6810.19.A from Huber+Suhner, Inc. provides equivalent performance across 0 Hz to 18 GHz with identical attenuation, power, and impedance specifications. This part is Active and REACH Unaffected.

R413V10000 from Radiall USA, Inc. exceeds the original frequency specification, operating to 67 GHz while maintaining 10dB attenuation and 1W power rating. This part is suitable for applications requiring extended frequency coverage.

Frequency-Limited Substitutes:

R411810124 from Radiall USA, Inc. maintains 10dB attenuation and 1W power rating but operates only to 6 GHz. This part is suitable for applications within the 0 Hz to 6 GHz band.

CATTEN-0100 from Crystek Corporation maintains 10dB attenuation and 1W power rating but operates only to 3 GHz. This part is suitable for applications within the 0 Hz to 3 GHz band.

Attenuation Tolerance Variant:

R411811124 from Radiall USA, Inc. provides 11dB attenuation (±1dB from specification) with identical impedance and power rating, operating to 6 GHz. This part is suitable for applications where ±1dB attenuation tolerance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can R411810124 or CATTEN-0100 replace AT-310(40) in all applications?

A: These parts are suitable only for applications operating within their respective frequency ranges (6 GHz and 3 GHz maximum). If your application requires operation above these frequencies, use AT-110-WP1(40), 6810.19.A, or R413V10000 instead.

Q: What is the difference between AT-310(40) and AT-110-WP1(40)?

A: Both parts are manufactured by Hirose Electric Co Ltd with identical electrical specifications (10dB, 0 Hz ~ 18 GHz, 50 Ohms, 1W). The primary difference is product status: AT-310(40) is Last Time Buy while AT-110-WP1(40) is Active. AT-110-WP1(40) is the recommended long-term substitute.

Q: Is R413V10000 compatible with AT-310(40)?

A: Yes. R413V10000 maintains the same attenuation (10dB), impedance (50 Ohms), and power rating (1W) while extending frequency coverage to 67 GHz. It is fully compatible and suitable for applications requiring extended frequency range.

Q: Can R411811124 be used as a direct replacement?

A: R411811124 provides 11dB attenuation instead of 10dB. It is suitable only for applications where ±1dB attenuation tolerance is acceptable. Verify your circuit design requirements before substitution.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts meet RoHS or ROHS3 compliance requirements. AT-310(40), AT-110-WP1(40), CATTEN-0100, R411810124, R411811124, and R413V10000 are RoHS or ROHS3 compliant. 6810.19.A is REACH Unaffected.

Q: What packaging is used for all these parts?

A: All parts use SMA In-Line Module packaging, ensuring mechanical and electrical compatibility across the entire substitute list.

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