R413803115 RF Attenuator SMA 3dB 4GHz 2W Equivalent & Substitute Parts

Part Overview

The R413803115 is an RF attenuator manufactured by Radiall USA, Inc., designed for in-line signal attenuation applications. This active product provides 3dB attenuation across a frequency range of 0 Hz to 4 GHz with 50 Ohm impedance and 2W power handling capability in an SMA connector configuration. Substitute parts are identified to address inventory availability, extended frequency range requirements, or alternative compliance certifications while maintaining core electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	R413803115
Manufacturer	Radiall USA, Inc.
Attenuation Value	3dB
Frequency Range	0 Hz ~ 4 GHz
Power (Watts)	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the R413803115 are qualified based on the following core parameters:

Primary Substitution Criteria:

Attenuation Value: 3dB (exact match required)
Impedance: 50 Ohms (exact match required)
Power Rating: 2W (exact match required)
Package / Case: SMA In-Line Module (exact match required)

Secondary Compatibility Factors:

Frequency Range: Minimum 0 Hz ~ 4 GHz (substitutes with extended range are acceptable)
Connector Type: SMA (standard RF connector compatibility)

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (Frequency Range ≥ 4 GHz): Parts meeting all primary criteria with frequency range equal to or exceeding the main part specification.

Category B - Extended Frequency Range Equivalents (Frequency Range > 4 GHz): Parts exceeding the main part frequency specification, suitable for applications requiring broader bandwidth while maintaining identical attenuation, impedance, and power handling.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation Value	Frequency Range	Power (Watts)	Impedance	Package / Case	RoHS Status	Product Status
R413803115	Radiall USA, Inc.	3dB	0 Hz ~ 4 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active
ATS-1M1F-03DB2W	Amphenol RF	3dB	0 Hz ~ 6 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active
M3933/16-01S	Cinch Connectivity Solutions Midwest Microwave	3dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/25-29N	Cinch Connectivity Solutions Midwest Microwave	3dB	0 Hz ~ 12.4 GHz	2W	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
M3933/25-64S	Cinch Connectivity Solutions Midwest Microwave	3dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS non-compliant	Active
P1AT-SAMF-18G2W-3	P1dB Inc	3dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	RoHS Compliant	Active
SA18E-03	Fairview Microwave	3dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active
SA18H-03	Fairview Microwave	3dB	0 Hz ~ 18 GHz	2W	50 Ohms	SMA In-Line Module	ROHS3 Compliant	Active

Engineering Selection Recommendations

RoHS3 Compliant Substitutes (Preferred for Regulated Applications):

The following substitutes maintain ROHS3 compliance matching the main part specification:

ATS-1M1F-03DB2W (Amphenol RF): Extends frequency range to 6 GHz while maintaining ROHS3 compliance and all electrical parameters.
P1AT-SAMF-18G2W-3 (P1dB Inc): Extends frequency range to 18 GHz with RoHS Compliant status and all electrical parameters.
SA18E-03 (Fairview Microwave): Extends frequency range to 18 GHz while maintaining ROHS3 compliance and all electrical parameters.
SA18H-03 (Fairview Microwave): Extends frequency range to 18 GHz while maintaining ROHS3 compliance and all electrical parameters.

Military-Grade Alternatives (MIL-DTL-M3933 Qualified):

The following substitutes are qualified to MIL-DTL-M3933 specification:

M3933/16-01N (Cinch Connectivity Solutions Midwest Microwave): Extends frequency range to 18 GHz with military qualification.
M3933/25-64N (Cinch Connectivity Solutions Midwest Microwave): Extends frequency range to 12.4 GHz with military qualification and highest inventory availability (70,100 units).

Extended Frequency Range Substitutes (Non-Compliant RoHS):

The following substitutes extend frequency range beyond 4 GHz but do not maintain RoHS compliance:

M3933/16-01S (Cinch Connectivity Solutions Midwest Microwave): Extends frequency range to 18 GHz.
M3933/25-29N (Cinch Connectivity Solutions Midwest Microwave): Extends frequency range to 12.4 GHz.
M3933/25-64S (Cinch Connectivity Solutions Midwest Microwave): Extends frequency range to 18 GHz.

All substitute parts maintain the core electrical specifications of 3dB attenuation, 50 Ohm impedance, 2W power handling, and SMA In-Line Module package configuration.

Frequently Asked Questions (FAQ)

Q: Can I substitute the R413803115 with a part that has a higher frequency range?

A: Yes. Any substitute part with a frequency range equal to or greater than 0 Hz ~ 4 GHz is electrically compatible. Parts with extended frequency ranges (6 GHz, 12.4 GHz, 18 GHz, or 40 GHz) will function correctly in applications limited to 4 GHz operation while providing additional bandwidth capability for future applications.

Q: What is the difference between RoHS3 Compliant and RoHS non-compliant substitutes?

A: RoHS3 Compliant parts (R413803115, ATS-1M1F-03DB2W, P1AT-SAMF-18G2W-3, SA18E-03, SA18H-03) meet European Union Restriction of Hazardous Substances regulations. RoHS non-compliant parts (M3933 series) do not meet these restrictions. Selection depends on regulatory requirements for your application or end market.

Q: Are all SMA In-Line Module packages mechanically interchangeable?

A: Yes. All substitute parts listed use the SMA In-Line Module package configuration, ensuring mechanical compatibility with existing SMA connector interfaces and mounting configurations.

Q: What is the significance of MIL-DTL-M3933 qualification?

A: MIL-DTL-M3933 qualification indicates the part meets U.S. military specifications for RF attenuators. Parts qualified to this standard (M3933/16-01N, M3933/25-64N) are suitable for defense and aerospace applications requiring military-grade components.

Q: Can I use the P1AT-29MF-40G2W-3 as a substitute?

A: The P1AT-29MF-40G2W-3 is not a direct substitute. While it matches the 3dB attenuation, 2W power, and 50 Ohm impedance specifications, it uses a 2.92mm connector package instead of SMA. This connector type difference prevents mechanical compatibility with SMA interfaces.

Q: Which substitute offers the best inventory availability?

A: The M3933/25-64N (Cinch Connectivity Solutions Midwest Microwave) offers the highest inventory availability with 70,100 units in stock. This part is MIL-DTL-M3933 qualified and extends the frequency range to 12.4 GHz.

Q: What is the difference between M3933/25-64N and M3933/25-64S?

A: Both parts are manufactured by Cinch Connectivity Solutions Midwest Microwave with identical frequency range (0 Hz ~ 12.4 GHz or 18 GHz respectively). The M3933/25-64N does not specify power rating, while M3933/25-64S explicitly provides 2W power handling matching the main part specification. For applications requiring confirmed 2W power capability, M3933/25-64S is the appropriate selection.

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