R413803000 RF Attenuator SMA 3dB 18GHz 2W Equivalent & Substitute Parts

Part Overview

The Radiall USA R413803000 is an RF attenuator module designed for inline signal attenuation in 50-ohm systems. This active product operates across the 0 Hz to 18 GHz frequency range with 3dB attenuation and 2W power handling capability in an SMA connector configuration. Substitute parts are identified to provide equivalent functional performance for applications requiring RF signal reduction, component obsolescence mitigation, or inventory optimization while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Attenuation Value	3dB
Frequency Range	0 Hz ~ 18 GHz
Power Rating	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
RoHS Status	ROHS3 Compliant
ECCN	EAR99

Substitute Part Grouping Explanation

Substitution eligibility for the R413803000 is determined by the following critical parameters:

Primary Substitution Criteria:

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

Secondary Compatibility Factors:

Frequency Range: 0 Hz ~ 18 GHz or greater (equal or extended range acceptable)
Connector Type: SMA (exact match required)

Substitute parts are grouped into two categories based on frequency coverage:

Category A - Full Frequency Coverage (0 Hz ~ 18 GHz): Parts meeting all primary criteria with frequency range equal to or exceeding the original specification. These provide direct substitution without frequency limitations.

Category B - Reduced Frequency Coverage (0 Hz ~ 12.4 GHz or 0 Hz ~ 6 GHz): Parts meeting all primary criteria but with limited frequency range. These are suitable only for applications operating within their specified frequency bands.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation (dB)	Frequency Range (GHz)	Power (W)	Impedance (Ohms)	Package	RoHS Status
R413803000	Radiall USA, Inc.	3	0 ~ 18	2	50	SMA In-Line Module	ROHS3 Compliant
M3933/16-01S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 18	2	50	SMA In-Line Module	RoHS non-compliant
M3933/25-64S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 18	2	50	SMA In-Line Module	RoHS non-compliant
P1AT-SAMF-18G2W-3	P1dB Inc	3	0 ~ 18	2	50	SMA In-Line Module	RoHS Compliant
SA18E-03	Fairview Microwave	3	0 ~ 18	2	50	SMA In-Line Module	ROHS3 Compliant
SA18H-03	Fairview Microwave	3	0 ~ 18	2	50	SMA In-Line Module	ROHS3 Compliant
M3933/25-29N	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 12.4	2	50	SMA In-Line Module	RoHS non-compliant
M3933/25-64N	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 12.4	2	50	SMA In-Line Module	RoHS non-compliant
M3933/16-01N	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 18	Not specified	Not specified	SMA In-Line Module	RoHS non-compliant
ATS-1M1F-03DB2W	Amphenol RF	3	0 ~ 6	2	50	SMA In-Line Module	ROHS3 Compliant
P1AT-29MF-40G2W-3	P1dB Inc	3	0 ~ 40	2	50	2.92mm In-Line Module	RoHS Compliant

Engineering Selection Recommendations

Direct Substitutes (Full Frequency Coverage - 0 Hz ~ 18 GHz):

The following parts provide complete electrical and mechanical equivalence to the R413803000 across the full 18 GHz frequency specification:

P1AT-SAMF-18G2W-3 (P1dB Inc): Meets all primary parameters with RoHS Compliant status. Suitable for applications requiring environmental compliance equivalent to the original part.
SA18E-03 and SA18H-03 (Fairview Microwave): Both meet all primary parameters with ROHS3 Compliant status, matching the original part's compliance profile.
M3933/16-01S and M3933/25-64S (Cinch Connectivity Solutions Midwest Microwave): Meet all primary electrical parameters with 0 Hz ~ 18 GHz coverage. RoHS non-compliant status requires evaluation against application environmental requirements.

Conditional Substitutes (Reduced Frequency Coverage):

M3933/25-29N (Cinch Connectivity Solutions Midwest Microwave): Suitable only for applications operating within 0 Hz ~ 12.4 GHz. Meets all other primary parameters.
M3933/25-64N (Cinch Connectivity Solutions Midwest Microwave): Suitable only for applications operating within 0 Hz ~ 12.4 GHz. Meets all other primary parameters.
ATS-1M1F-03DB2W (Amphenol RF): Suitable only for applications operating within 0 Hz ~ 6 GHz. Meets all other primary parameters with ROHS3 Compliant status.

Non-Equivalent Parts:

M3933/16-01N (Cinch Connectivity Solutions Midwest Microwave): Power rating and impedance specifications not provided; substitution eligibility cannot be confirmed.
P1AT-29MF-40G2W-3 (P1dB Inc): Connector type is 2.92mm, not SMA. Mechanical incompatibility with SMA-based systems.

Frequently Asked Questions (FAQ)

Q: Can M3933/25-64S be used as a direct replacement for R413803000?

A: Yes. M3933/25-64S meets all primary substitution criteria: 3dB attenuation, 50-ohm impedance, 2W power rating, and SMA In-Line Module package with 0 Hz ~ 18 GHz frequency coverage. RoHS non-compliant status must be evaluated against application requirements.

Q: What is the difference between M3933/16-01S and M3933/25-64S?

A: Both parts meet identical electrical specifications (3dB, 50 ohms, 2W, 0 Hz ~ 18 GHz, SMA). The difference lies in the base product number designation (M3933/16 versus M3933/25), which reflects different product lines within Cinch Connectivity Solutions. Electrical performance is equivalent.

Q: Can ATS-1M1F-03DB2W replace R413803000 in all applications?

A: No. ATS-1M1F-03DB2W has a frequency range limited to 0 Hz ~ 6 GHz, compared to the R413803000's 0 Hz ~ 18 GHz specification. Substitution is valid only for applications operating within the 6 GHz frequency limit.

Q: Why is P1AT-29MF-40G2W-3 not a suitable substitute despite having extended frequency coverage?

A: P1AT-29MF-40G2W-3 uses a 2.92mm connector interface, while R413803000 uses SMA connectors. Mechanical incompatibility prevents direct substitution in SMA-based systems.

Q: Are there compliance differences between substitute options?

A: Yes. R413803000 is ROHS3 Compliant. P1AT-SAMF-18G2W-3 and SA18E-03/SA18H-03 are also RoHS Compliant or ROHS3 Compliant. M3933 series parts (M3933/16-01S, M3933/25-64S, M3933/25-29N, M3933/25-64N, M3933/16-01N) are RoHS non-compliant. Application environmental requirements determine acceptable compliance status.

Q: What does "0 Hz ~ 18 GHz" frequency range mean for substitution?

A: This specification indicates the attenuator operates across the entire frequency band from DC (0 Hz) to 18 GHz. Substitute parts with identical or extended frequency ranges (such as 0 Hz ~ 40 GHz) are acceptable. Parts with reduced ranges (such as 0 Hz ~ 12.4 GHz) are suitable only for applications not exceeding their specified upper frequency limit.

Q: Can M3933/16-01N be used as a substitute?

A: M3933/16-01N cannot be confirmed as a suitable substitute. While it specifies 3dB attenuation and 0 Hz ~ 18 GHz frequency coverage in an SMA In-Line Module, the power rating and impedance specifications are not provided in available documentation. Confirmation of 2W power rating and 50-ohm impedance is required before substitution.

Q: What is the significance of the "Bag" versus "Bulk" packaging designation?

A: Packaging designation (Bag or Bulk) reflects the physical form of component delivery and does not affect electrical or mechanical compatibility. Both packaging types deliver functionally equivalent parts.

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