R413804121 RF Attenuator SMA 4dB 26.5GHz 2W Equivalent & Substitute Parts

Part Overview

The R413804121 is an RF attenuator manufactured by Radiall USA, Inc., designed for inline SMA applications. This component provides 4dB attenuation across a frequency range of 0 Hz to 26.5 GHz with 50 Ohm impedance and 2W power handling capability. The part is currently in active product status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching core electrical parameters: attenuation value, impedance, power rating, and package type. Alternative components may be required due to inventory availability, lead time considerations, or specific application frequency range requirements.

Key Parameters

Parameter	Value
Attenuation Value	4dB
Frequency Range	0 Hz ~ 26.5 GHz
Impedance	50 Ohms
Power Rating	2W
Package Type	SMA In-Line Module
Connector Configuration	SMA Male to SMA Female
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the R413804121 is determined by the following core parameters:

Primary Matching Criteria:

Attenuation Value: 4dB (exact match required)
Impedance: 50 Ohms (exact match required)
Package Type: SMA In-Line Module (exact match required)
Power Rating: 2W (exact match or higher acceptable)

Secondary Consideration:

Frequency Range: The main part operates 0 Hz ~ 26.5 GHz. Substitute parts with lower maximum frequency ratings remain functionally compatible for applications operating within their specified frequency range, though they do not provide full bandwidth coverage of the main part.

All identified substitute parts match the primary criteria of 4dB attenuation, 50 Ohm impedance, and SMA in-line module packaging. Frequency range variations and compliance certifications are noted for application-specific selection.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation	Frequency Range	Power (Watts)	Impedance	Package Type	RoHS Status	Product Status
R413804121	Radiall USA, Inc.	4dB	0 Hz ~ 26.5 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active
ATS-1M1F-04DB2W	Amphenol RF	4dB	0 Hz ~ 6 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active
CGA-1040-04-SMA-02	Cinch Connectivity Solutions	4dB	0 Hz ~ 4 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active
M3933/25-66N	Cinch Connectivity Solutions Midwest Microwave	4dB	0 Hz ~ 18 GHz	Not Specified	Not Specified	SMA In-Line Module	RoHS non-compliant	Active
P1AT-SAMF-6G2W-4	P1dB Inc	4dB	0 Hz ~ 6 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active

Engineering Selection Recommendations

Full Specification Match (Recommended for Direct Replacement):

The R413804121 has no substitute parts that match all electrical and compliance specifications. The main part provides the widest frequency coverage at 0 Hz ~ 26.5 GHz with ROHS3 compliance and 2W power rating.

Compliant Alternatives (ROHS3 Compliant, 2W, 50 Ohm, 4dB):

ATS-1M1F-04DB2W (Amphenol RF): Suitable for applications operating within 0 Hz ~ 6 GHz. ROHS3 compliant with active product status.
CGA-1040-04-SMA-02 (Cinch Connectivity Solutions): Suitable for applications operating within 0 Hz ~ 4 GHz. ROHS3 compliant with active product status.
P1AT-SAMF-6G2W-4 (P1dB Inc): Suitable for applications operating within 0 Hz ~ 6 GHz. ROHS3 compliant with active product status.

Military Grade Alternative (Non-Compliant with RoHS):

M3933/25-66N (Cinch Connectivity Solutions Midwest Microwave): Qualified to MIL-DTL-M3933 military specification. Operates 0 Hz ~ 18 GHz. RoHS non-compliant. Power rating not specified in available data. Suitable for military applications where RoHS compliance is not required.

Selection should prioritize applications requiring the full 26.5 GHz bandwidth of the R413804121. For bandwidth-limited applications, the compliant alternatives provide equivalent electrical performance within their specified frequency ranges.

Frequently Asked Questions (FAQ)

Q: Can ATS-1M1F-04DB2W be used as a direct replacement for R413804121?

A: The ATS-1M1F-04DB2W matches the core electrical parameters of 4dB attenuation, 50 Ohm impedance, 2W power rating, and SMA in-line module packaging. However, it operates only to 6 GHz maximum frequency, compared to the R413804121's 26.5 GHz capability. It is suitable for applications operating within the 0 Hz ~ 6 GHz range.

Q: What is the difference between the R413804121 and M3933/25-66N?

A: Both components provide 4dB attenuation in SMA in-line module format. The M3933/25-66N is qualified to military specification MIL-DTL-M3933 and operates to 18 GHz. The R413804121 operates to 26.5 GHz and is ROHS3 compliant. The M3933/25-66N is RoHS non-compliant. Power rating for the M3933/25-66N is not specified in available documentation.

Q: Are all substitute parts ROHS3 compliant?

A: No. The ATS-1M1F-04DB2W, CGA-1040-04-SMA-02, and P1AT-SAMF-6G2W-4 are ROHS3 compliant. The M3933/25-66N is RoHS non-compliant and is intended for military applications.

Q: What packaging formats are available for these attenuators?

A: All listed parts use SMA in-line module packaging. The R413804121, ATS-1M1F-04DB2W, CGA-1040-04-SMA-02, and P1AT-SAMF-6G2W-4 are supplied in bulk packaging. The M3933/25-66N is supplied in bag packaging.

Q: Which substitute part has the highest frequency capability?

A: The M3933/25-66N operates to 18 GHz maximum frequency. The R413804121 operates to 26.5 GHz, providing the highest frequency capability among all listed parts.

Q: Can I use CGA-1040-04-SMA-02 in a 10 GHz application?

A: No. The CGA-1040-04-SMA-02 is specified for 0 Hz ~ 4 GHz operation. Use at frequencies above 4 GHz is outside the component's specified operating range.

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