AT-104V RF Attenuator 4dB 50 Ohm SMA In-Line Module

Part Overview

The AT-104V is a 4dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for applications requiring signal attenuation across the 0 Hz to 18 GHz frequency range. This component operates at 50 ohms impedance with 2W power handling capability in an SMA in-line module package format. The part is currently in Last Time Buy status, indicating production discontinuation. Equivalent substitute parts are necessary for ongoing procurement and system maintenance.

Key Parameters

Parameter	Value
Manufacturer Part Number	AT-104V
Manufacturer	Hirose Electric Co Ltd
Attenuation Value	4dB
Frequency Range	0 Hz ~ 18 GHz
Impedance	50 Ohms
Power Rating	2W
Package / Case	SMA In-Line Module
RoHS Status	RoHS Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitute parts for the AT-104V are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Attenuation Value: 4dB (all substitutes match)
Impedance: 50 Ohms (all substitutes match)
Package / Case: SMA In-Line Module (all substitutes match)

Secondary Differentiation Criteria:

Frequency Range: Substitutes vary between 0 Hz ~ 2 GHz, 0 Hz ~ 12.4 GHz, and 0 Hz ~ 18 GHz
Power Rating: Specified as 2W in the main part; some substitutes do not specify power rating
RoHS Compliance: Main part is RoHS Compliant; all substitutes are RoHS non-compliant

Substitutes are organized into three frequency-based groups: limited bandwidth (2 GHz), mid-range bandwidth (12.4 GHz), and full bandwidth (18 GHz). Selection depends on the application's frequency requirements.

Parameter Comparison

Part Number	Manufacturer	Attenuation	Frequency Range	Impedance	Power (W)	Package	RoHS Status	Product Status
AT-104V	Hirose Electric Co Ltd	4dB	0 Hz ~ 18 GHz	50 Ohms	2W	SMA In-Line Module	RoHS Compliant	Last Time Buy
M3933/14-08N	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 12.4 GHz	50 Ohms	—	SMA In-Line Module	RoHS non-compliant	Active
M3933/14-08S	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 12.4 GHz	50 Ohms	—	SMA In-Line Module	RoHS non-compliant	Active
M3933/16-07N	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 18 GHz	50 Ohms	—	SMA In-Line Module	RoHS non-compliant	Active
M3933/16-07S	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 18 GHz	50 Ohms	2W	SMA In-Line Module	RoHS non-compliant	Active
M3933/25-04N	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 2 GHz	50 Ohms	2W	SMA In-Line Module	RoHS non-compliant	Active
M3933/25-04S	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 2 GHz	50 Ohms	2W	SMA In-Line Module	RoHS non-compliant	Active
M3933/25-30N	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 12.4 GHz	50 Ohms	2W	SMA In-Line Module	RoHS non-compliant	Active

Engineering Selection Recommendations

Full Bandwidth Equivalents (0 Hz ~ 18 GHz): M3933/16-07S is the closest functional equivalent to AT-104V, matching the full 18 GHz frequency range and 2W power rating. Both parts maintain identical attenuation, impedance, and package specifications. This part is in Active product status with current inventory availability.

Mid-Range Bandwidth Alternatives (0 Hz ~ 12.4 GHz): M3933/25-30N provides 2W power handling and mid-range frequency coverage suitable for applications not requiring full 18 GHz bandwidth. M3933/14-08N and M3933/14-08S offer equivalent frequency coverage but do not specify power rating.

Limited Bandwidth Alternatives (0 Hz ~ 2 GHz): M3933/25-04N and M3933/25-04S are suitable only for low-frequency applications within the 2 GHz limit, both rated at 2W.

All Cinch Connectivity Solutions Midwest Microwave substitutes are in Active product status with established inventory. RoHS compliance differs from the original AT-104V specification.

Frequently Asked Questions (FAQ)

Q: Can M3933/16-07S directly replace AT-104V in all applications? A: M3933/16-07S matches the critical parameters of AT-104V: 4dB attenuation, 50 ohm impedance, 2W power rating, and 0 Hz ~ 18 GHz frequency range in SMA in-line module package. The primary difference is RoHS compliance status. Substitution is valid for applications where RoHS non-compliance is acceptable.

Q: What is the difference between M3933/16-07N and M3933/16-07S? A: Both parts share identical frequency range (0 Hz ~ 18 GHz), attenuation (4dB), and impedance (50 Ohms). M3933/16-07S specifies 2W power rating; M3933/16-07N does not specify power rating. M3933/16-07N carries Military grade qualification per MIL-DTL-M3933.

Q: Why do some substitutes not specify power rating? A: Power rating is provided only for parts where this parameter is documented in the manufacturer specification. Absence of specification does not indicate zero power capability but rather that this parameter was not included in the available technical data.

Q: Can I use M3933/25-30N if my application requires 18 GHz operation? A: No. M3933/25-30N is limited to 0 Hz ~ 12.4 GHz. For applications requiring full 18 GHz bandwidth, use M3933/16-07S or M3933/16-07N.

Q: Are all substitute parts available in the same packaging as AT-104V? A: All substitute parts use SMA in-line module package format. AT-104V was supplied in Bulk packaging; Cinch substitutes are supplied in Bag packaging. This does not affect functional compatibility.

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