R411809121 RF Attenuator SMA 9dB 2W Equivalent & Substitute Parts

Part Overview

The R411809121 is an RF attenuator manufactured by Radiall USA, Inc., designed for in-line attenuation applications in RF and microwave systems. This SMA-connectorized module provides 9dB attenuation across a 0 Hz to 4 GHz frequency range with 2W power handling capability and 50-ohm impedance. The part is currently active in production and ROHS3 compliant. Equivalent and substitute parts are identified for applications requiring extended frequency coverage, inventory availability, or alternative sourcing options while maintaining core electrical and mechanical specifications.

Key Parameters

Parameter	Value
Attenuation Value	9dB
Frequency Range	0 Hz ~ 4 GHz
Power Rating	2W
Impedance	50 Ohms
Package Type	SMA In-Line Module
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the R411809121 are qualified based on the following critical parameters that determine functional equivalence:

Core Electrical Parameters (Required Match):

Attenuation Value: 9dB
Impedance: 50 Ohms
Power Rating: 2W
Connector Type: SMA

Mechanical Parameters (Required Match):

Package Configuration: SMA In-Line Module

Compliance Parameters:

RoHS3 Compliance
Active product status

The substitute parts ATS-1M1F-09DB2W and P1AT-SAMF-6G2W-9 meet all core electrical and mechanical requirements. Both parts extend the frequency range to 0 Hz ~ 6 GHz, which encompasses the original 0 Hz ~ 4 GHz specification and provides additional operational bandwidth. This extended frequency capability does not compromise compatibility with applications designed for the R411809121 within its original frequency band.

Parameter Comparison

Parameter	R411809121 (Radiall USA)	ATS-1M1F-09DB2W (Amphenol RF)	P1AT-SAMF-6G2W-9 (P1dB Inc)
Attenuation Value	9dB	9dB	9dB
Frequency Range	0 Hz ~ 4 GHz	0 Hz ~ 6 GHz	0 Hz ~ 6 GHz
Power Rating	2W	2W	2W
Impedance	50 Ohms	50 Ohms	50 Ohms
Package Type	SMA In-Line Module	SMA In-Line Module	SMA In-Line Module
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active
Inventory Availability	1011 Pcs	953 Pcs	812 Pcs

Engineering Selection Recommendations

Primary Selection (R411809121): The Radiall USA R411809121 remains the primary choice for applications with frequency requirements limited to 0 Hz ~ 4 GHz. This part offers the highest current inventory level at 1011 pieces and maintains active production status with full ROHS3 compliance.

Secondary Selection (ATS-1M1F-09DB2W): The Amphenol RF ATS-1M1F-09DB2W is a direct functional equivalent with extended frequency coverage to 6 GHz. This part is suitable for applications requiring broader frequency operation or when Radiall inventory is unavailable. The part maintains ROHS3 compliance and active product status with 953 pieces in stock.

Tertiary Selection (P1AT-SAMF-6G2W-9): The P1dB Inc P1AT-SAMF-6G2W-9 provides equivalent electrical and mechanical specifications with 6 GHz frequency coverage. This part is ROHS3 compliant and REACH unaffected, with 812 pieces available. Selection is appropriate when Radiall and Amphenol options are exhausted or when REACH compliance status is a procurement requirement.

All three parts are suitable for direct substitution within the specified electrical and mechanical parameters. Selection among alternatives should be based on inventory availability, delivery lead time, and procurement compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can the ATS-1M1F-09DB2W be used as a direct replacement for the R411809121?

A: Yes. Both parts share identical attenuation (9dB), power rating (2W), impedance (50 ohms), and SMA in-line module packaging. The extended frequency range of the ATS-1M1F-09DB2W (0 Hz ~ 6 GHz versus 0 Hz ~ 4 GHz) does not affect compatibility with applications designed for the R411809121 within its original frequency band.

Q: What is the difference between the three substitute parts?

A: All three parts provide 9dB attenuation, 2W power handling, 50-ohm impedance, and SMA in-line module configuration. The primary differences are manufacturer origin and frequency range extension. The R411809121 operates to 4 GHz, while both ATS-1M1F-09DB2W and P1AT-SAMF-6G2W-9 extend to 6 GHz. Compliance certifications vary slightly, with P1AT-SAMF-6G2W-9 being REACH unaffected.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The R411809121, ATS-1M1F-09DB2W, and P1AT-SAMF-6G2W-9 are all ROHS3 compliant.

Q: Does the extended frequency range of substitute parts affect performance in 0 Hz ~ 4 GHz applications?

A: No. Extended frequency range does not degrade performance within the original 0 Hz ~ 4 GHz band. The substitute parts maintain identical attenuation and impedance specifications across the overlapping frequency range.

Q: Which part should be selected for new designs?

A: For new designs, either ATS-1M1F-09DB2W or P1AT-SAMF-6G2W-9 are appropriate selections, as the extended 6 GHz frequency coverage provides design flexibility without performance compromise. Selection between these two should be based on procurement requirements, lead time, and compliance certifications.

Q: Are there any mechanical differences between the parts?

A: No. All three parts use identical SMA in-line module packaging and are mechanically interchangeable.

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