R413203150 Precision Attenuator SMA 3dB Equivalent & Substitute Parts

Part Overview

The Radiall USA R413203150 is a precision RF attenuator module designed for in-line signal attenuation applications. This active product operates across the 0 Hz to 4 GHz frequency range with 3dB attenuation, 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, compliance variations, and connector type alternatives while maintaining core electrical specifications.

Key Parameters

Parameter	Value
Attenuation Value	3dB
Frequency Range	0 Hz ~ 4 GHz
Power Rating	2W
Impedance	50 Ohms
Package / Case	SMA In-Line Module
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following core parameters:

Primary Matching Criteria:

Attenuation Value: 3dB (exact match required)
Impedance: 50 Ohms (exact match required)
Power Rating: 2W (exact match required)
Connector Type: SMA In-Line Module (primary group) or alternative RF connectors (secondary group)

Secondary Considerations:

Frequency Range: Substitute parts with extended frequency ranges (up to 18 GHz or 40 GHz) are compatible for applications operating within the original 0 Hz ~ 4 GHz specification
RoHS Compliance: Substitutes with RoHS non-compliant status are listed but require compliance verification for regulated applications
Packaging: Bulk and Bag packaging are functionally equivalent for component selection

Substitutes are grouped into two categories: SMA In-Line Module equivalents (direct connector match) and alternative connector types (2.92mm) for specialized applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Attenuation (dB)	Frequency Range (GHz)	Power (W)	Impedance (Ohms)	Connector Type	RoHS Status	Inventory (Pcs)
R413203150	Radiall USA, Inc.	3	0 ~ 4	2	50	SMA In-Line	ROHS3 Compliant	754
ATS-1M1F-03DB2W	Amphenol RF	3	0 ~ 6	2	50	SMA In-Line	ROHS3 Compliant	1444
M3933/16-01S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 18	2	50	SMA In-Line	RoHS non-compliant	990
M3933/25-29N	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 12.4	2	50	SMA In-Line	RoHS non-compliant	1003
M3933/25-64S	Cinch Connectivity Solutions Midwest Microwave	3	0 ~ 18	2	50	SMA In-Line	RoHS non-compliant	635
P1AT-SAMF-18G2W-3	P1dB Inc	3	0 ~ 18	2	50	SMA In-Line	RoHS Compliant	745
SA18E-03	Fairview Microwave	3	0 ~ 18	2	50	SMA In-Line	ROHS3 Compliant	1172
SA18H-03	Fairview Microwave	3	0 ~ 18	2	50	SMA In-Line	ROHS3 Compliant	787
P1AT-29MF-40G2W-3	P1dB Inc	3	0 ~ 40	2	50	2.92mm In-Line	RoHS Compliant	873

Engineering Selection Recommendations

SMA In-Line Module Substitutes (Direct Connector Compatibility):

For applications requiring ROHS3 compliance with extended frequency capability, the ATS-1M1F-03DB2W (Amphenol RF) provides direct substitution with 6 GHz frequency range and superior inventory availability (1444 units). The SA18E-03 and SA18H-03 (Fairview Microwave) offer ROHS3 compliance with 18 GHz frequency range and high stock levels.

For applications where RoHS non-compliance is acceptable, the M3933/16-01S and M3933/25-64S (Cinch Connectivity Solutions Midwest Microwave) provide 18 GHz frequency range with military-grade qualification (MIL-DTL-M3933). The M3933/25-29N variant supports 12.4 GHz operation.

The P1AT-SAMF-18G2W-3 (P1dB Inc) combines RoHS compliance with 18 GHz frequency range and represents a compliant alternative for regulated environments.

Alternative Connector Type (2.92mm):

The P1AT-29MF-40G2W-3 (P1dB Inc) provides extended frequency coverage to 40 GHz with RoHS compliance but requires 2.92mm connector compatibility verification in the target application.

Inventory Considerations:

Highest inventory availability exists for M3933/25-64N (70,100 units), though power rating specification is not provided for this variant. ATS-1M1F-03DB2W (1444 units) and SA18E-03 (1172 units) offer substantial stock with full electrical specification documentation.

Frequently Asked Questions (FAQ)

Q: Can the ATS-1M1F-03DB2W replace the R413203150 in all applications?

A: The ATS-1M1F-03DB2W is electrically compatible for applications operating within the original 0 Hz ~ 4 GHz specification. The extended 6 GHz frequency range does not affect performance at lower frequencies. Both parts share identical 3dB attenuation, 2W power rating, 50 Ohm impedance, and SMA connector configuration. ROHS3 compliance is maintained.

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

A: Both parts provide 3dB attenuation, 2W power, 50 Ohm impedance, and SMA connectors with 18 GHz frequency range. The M3933/16 and M3933/25 designations indicate different base product families within the Cinch Connectivity Solutions Midwest Microwave M3933 series. Selection between these variants depends on procurement source and availability. Neither part is RoHS compliant.

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

A: The P1AT-29MF-40G2W-3 provides identical electrical specifications (3dB, 2W, 50 Ohms) but uses a 2.92mm connector instead of SMA. Direct mechanical substitution is not possible without connector adaptation. This part is suitable only for applications with 2.92mm connector compatibility.

Q: Are RoHS non-compliant substitutes acceptable?

A: RoHS non-compliant parts (M3933 series) are suitable for applications without regulatory compliance requirements. For consumer electronics, medical devices, or regulated industrial applications, ROHS3 compliant alternatives (ATS-1M1F-03DB2W, P1AT-SAMF-18G2W-3, SA18E-03, SA18H-03) must be specified.

Q: Does extended frequency range affect performance at 4 GHz?

A: No. Substitutes with extended frequency ranges (6 GHz, 12.4 GHz, 18 GHz, or 40 GHz) maintain the specified 3dB attenuation across the original 0 Hz ~ 4 GHz operating band. Extended frequency capability does not degrade performance at lower frequencies.

Q: What packaging differences exist between substitutes?

A: The R413203150 is supplied in Bulk packaging. Substitute parts are available in Bulk (Amphenol RF, P1dB Inc, Fairview Microwave) or Bag (Cinch Connectivity Solutions Midwest Microwave) packaging. Packaging type does not affect electrical or mechanical performance; selection is based on procurement and inventory management requirements.

Q: Which substitute offers the best inventory availability?

A: The M3933/25-64N (Cinch Connectivity Solutions Midwest Microwave) provides the highest inventory level at 70,100 units. However, power rating specification is not documented for this variant. For fully specified alternatives with substantial inventory, the ATS-1M1F-03DB2W (1444 units) and SA18E-03 (1172 units) are recommended.

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