RF Attenuator AT-110V Equivalent & Substitute Parts

Part Overview

The AT-110V is a 10dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for 50-ohm systems operating across 0 Hz to 18 GHz with 2W power handling capability in an SMA in-line module configuration. This component is designated as Last Time Buy, indicating production discontinuation. Identifying equivalent and substitute parts ensures design continuity and supply chain resilience for applications requiring fixed RF attenuation in microwave and RF systems.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT-110V
Manufacturer	Hirose Electric Co Ltd
Attenuation Value	10dB
Frequency Range	0 Hz ~ 18 GHz
Power (Watts)	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AT-110V is determined by the following critical parameters:

Attenuation Value: 10dB (exact match required for signal level specifications)
Impedance: 50 Ohms (system impedance matching)
Package / Case: SMA In-Line Module (mechanical and electrical interface compatibility)
Frequency Range: Minimum coverage of 0 Hz ~ 18 GHz or applicable subset
Power Rating: Minimum 2W or higher (thermal and reliability requirements)

Substitute parts are grouped into two categories:

Category A - Full Parameter Match (0 Hz ~ 18 GHz, 2W, 10dB, 50 Ohms, SMA): Parts meeting all critical parameters with identical or superior specifications.

Category B - Functional Equivalents (Frequency Range Limitation): Parts meeting attenuation, impedance, power, and package requirements but with reduced frequency coverage (0 Hz ~ 3 GHz or 0 Hz ~ 12.4 GHz). These are suitable for applications not requiring full 18 GHz bandwidth.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation Value	Frequency Range	Power (Watts)	Impedance	Package / Case	Product Status	RoHS Status
AT-110V	Hirose Electric Co Ltd	10dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	Last Time Buy	ROHS3 Compliant
32AS102-K10S3	Rosenberger	10dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	Active	RoHS Compliant
M3933/16-03S	Cinch Connectivity Solutions Midwest Microwave	10dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	Active	RoHS non-compliant
M3933/16-03N	Cinch Connectivity Solutions Midwest Microwave	10dB	0 Hz ~ 18 GHz	—	50 Ohms	SMA In-Line Module	Active	RoHS non-compliant
M3933/14-03S	Cinch Connectivity Solutions Midwest Microwave	10dB	0 Hz ~ 12.4 GHz	—	50 Ohms	SMA In-Line Module	Active	RoHS non-compliant
LCAT1002-10	L-com	10dB	0 Hz ~ 3 GHz	2W	50 Ohms	SMA In-Line Module	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute (Active Status, Full Frequency Coverage): The 32AS102-K10S3 from Rosenberger is the preferred substitute, offering identical electrical specifications (10dB, 0 Hz ~ 18 GHz, 2W, 50 Ohms, SMA) with Active product status and RoHS compliance. This part provides direct functional replacement without design modification.

Secondary Substitutes (Active Status, Full Frequency Coverage): M3933/16-03S from Cinch Connectivity Solutions Midwest Microwave matches all critical parameters (10dB, 0 Hz ~ 18 GHz, 2W, 50 Ohms, SMA) and maintains Active status. Note that this part is RoHS non-compliant; selection depends on regulatory requirements for the end application.

M3933/16-03N from Cinch Connectivity Solutions Midwest Microwave provides 10dB attenuation across 0 Hz ~ 18 GHz with 50-ohm impedance and SMA packaging. Power rating is not specified; verification with the manufacturer is required for applications with strict thermal budgets.

Limited Frequency Coverage Alternatives: M3933/14-03S (0 Hz ~ 12.4 GHz) and LCAT1002-10 (0 Hz ~ 3 GHz) are suitable only for applications where the reduced frequency range is acceptable. These parts should not be selected for systems requiring full 18 GHz operation.

Compliance Considerations: For RoHS-compliant designs, select 32AS102-K10S3 or LCAT1002-10. For applications without RoHS requirements, M3933/16-03S and M3933/16-03N offer additional sourcing options.

Frequently Asked Questions (FAQ)

Q: Can AT-111V (11dB) be used as a substitute for AT-110V (10dB)? A: No. Attenuation value is a critical parameter that directly affects signal level in the system. An 11dB attenuator will reduce signal strength by 1dB more than specified, causing system performance degradation. Substitution requires exact attenuation matching.

Q: What is the difference between M3933/16-03S and M3933/16-03N? A: Both parts provide 10dB attenuation across 0 Hz ~ 18 GHz with 50-ohm impedance and SMA packaging. M3933/16-03S specifies 2W power rating, while M3933/16-03N does not provide power specification. For applications with defined power requirements, M3933/16-03S is the safer selection.

Q: Can LCAT1002-10 replace AT-110V in a full-band system? A: LCAT1002-10 is limited to 0 Hz ~ 3 GHz operation, while AT-110V covers 0 Hz ~ 18 GHz. This substitute is only suitable for applications operating within the 3 GHz bandwidth. For systems requiring full 18 GHz coverage, LCAT1002-10 is not appropriate.

Q: Are there RoHS compliance differences between substitutes? A: Yes. AT-110V and LCAT1002-10 are ROHS3 compliant. 32AS102-K10S3 is RoHS compliant. M3933/16-03S, M3933/16-03N, and M3933/14-03S are RoHS non-compliant. Selection depends on end-product regulatory requirements.

Q: Does the SMA in-line module package ensure mechanical compatibility? A: Yes. All listed substitutes use SMA in-line module packaging, ensuring mechanical and electrical interface compatibility with existing system designs. No connector or mounting modifications are required.

Q: What should I verify before selecting M3933/16-03N? A: Confirm power handling capability with the manufacturer, as power rating is not specified in available documentation. For applications with 2W or higher power requirements, this specification gap must be resolved before design implementation.

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