RF Attenuator AT-110(40) Equivalent & Substitute Parts

Part Overview

The AT-110(40) is a 10dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation in 50-ohm RF systems. This component operates across a frequency range of 0 Hz to 18 GHz with 1W power handling capability and SMA connectors. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure continued availability and system compatibility for new designs and field replacements.

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-110(40) is determined by the following critical parameters:

Attenuation Value: Must be 10dB (±1dB tolerance acceptable for near-equivalent applications)
Impedance: Must be 50 Ohms
Package Type: Must be SMA In-Line Module
Power Rating: Must support minimum 1W
Frequency Range: Must cover the required operating bandwidth

Parts are grouped into two categories:

Full Equivalents (identical attenuation and frequency coverage): AT-110-WP1(40), R413V10000

Functional Equivalents (10dB attenuation, 50 ohms, 1W, SMA, but with limited frequency range): CATTEN-0100, R411810124

Near-Equivalent (11dB attenuation, outside tolerance): R411811124

Alternative Source (10dB, extended frequency range): 6810.19.A

Parameter Comparison

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

Engineering Selection Recommendations

Primary Substitutes (Full Compatibility)

AT-110-WP1(40) from Hirose Electric Co Ltd is the direct replacement. It maintains identical electrical specifications and frequency coverage while offering Active product status. Both RoHS Compliant certifications ensure regulatory alignment.

R413V10000 from Radiall USA, Inc. provides full parametric equivalence with extended frequency coverage to 67 GHz. This part is Active and ROHS3 Compliant, offering superior performance margin for future applications.

Secondary Substitutes (Frequency-Limited)

6810.19.A from Huber+Suhner, Inc. matches the AT-110(40) across all critical parameters including the 18 GHz frequency ceiling. Active status and REACH Unaffected designation support long-term availability.

CATTEN-0100 from Crystek Corporation and R411810124 from Radiall USA, Inc. are suitable only for applications operating below 3 GHz and 6 GHz respectively. Both are Active with current compliance certifications.

Not Recommended

R411811124 deviates from the 10dB specification with 11dB attenuation, placing it outside acceptable tolerance for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can AT-110-WP1(40) replace AT-110(40) in all applications?

A: Yes. Both parts share identical attenuation (10dB), frequency range (0 Hz ~ 18 GHz), power rating (1W), impedance (50 Ohms), and package type (SMA In-Line Module). AT-110-WP1(40) is the active production equivalent.

Q: What is the difference between R413V10000 and AT-110(40)?

A: R413V10000 provides the same 10dB attenuation, 1W power, and 50-ohm impedance in an SMA In-Line Module. The primary difference is extended frequency coverage to 67 GHz versus 18 GHz on the AT-110(40). This makes R413V10000 suitable for broader bandwidth applications.

Q: Can CATTEN-0100 be used as a direct replacement?

A: CATTEN-0100 is suitable only for systems operating at frequencies below 3 GHz. The AT-110(40) specifies operation to 18 GHz. Use CATTEN-0100 only if your application bandwidth does not exceed 3 GHz.

Q: Why is R411811124 listed if it is not recommended?

A: R411811124 is included for reference as it appears in the substitute list. However, its 11dB attenuation deviates from the 10dB specification of the AT-110(40), making it unsuitable for direct substitution without circuit redesign.

Q: What compliance certifications should I verify?

A: The AT-110(40) is RoHS Compliant. Substitute parts AT-110-WP1(40) and R413V10000 are ROHS3 Compliant. CATTEN-0100 and R411810124 are ROHS3 Compliant. Verify that your application requirements align with these certifications before final selection.

Q: Are there inventory considerations for part selection?

A: Current inventory levels are: AT-110(40) 850 pcs, AT-110-WP1(40) 813 pcs, R413V10000 850 pcs, 6810.19.A 847 pcs, CATTEN-0100 824 pcs, R411810124 1043 pcs, and R411811124 875 pcs. All parts show adequate stock for procurement.

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