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R411830121 RF Attenuator SMA 30dB 18GHz 2W Equivalent & Substitute Parts
Part Overview
The R411830121 is an RF attenuator manufactured by Radiall USA, Inc., designed for in-line signal attenuation in RF and microwave applications. This SMA-connectorized module provides 30dB attenuation across a frequency range of 0 Hz to 18 GHz with 50-ohm impedance and 2-watt power handling capability. The part maintains Active product status and is available in bulk packaging. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative sourcing is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Attenuation Value | 30dB |
| Frequency Range | 0 Hz ~ 18 GHz |
| Power Rating | 2W |
| Impedance | 50 Ohms |
| Package / Case | SMA In-Line Module |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the R411830121 are classified based on strict parametric equivalence. The primary substitution criteria are: attenuation value (30dB), impedance (50 ohms), power handling (2W), package type (SMA In-Line Module), and product status (Active). Parts are grouped into two categories:
Full Parametric Equivalents: Parts that match all key parameters including the complete frequency range of 0 Hz to 18 GHz.
Frequency-Limited Equivalents: Parts that match all parameters except frequency range, which is restricted to 0 Hz to 6 GHz.
The frequency range parameter is critical for substitution decisions. Parts with reduced frequency range are not suitable for applications requiring operation above 6 GHz.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Attenuation (dB) | Frequency Range | Power (W) | Impedance (Ω) | Package | Product Status |
|---|---|---|---|---|---|---|---|
| R411830121 | Radiall USA, Inc. | 30 | 0 Hz ~ 18 GHz | 2 | 50 | SMA In-Line Module | Active |
| P1AT-SAMF-18G2W-30 | P1dB Inc | 30 | 0 Hz ~ 18 GHz | 2 | 50 | SMA In-Line Module | Active |
| SA18E-30 | Fairview Microwave | 30 | 0 Hz ~ 18 GHz | 2 | 50 | SMA In-Line Module | Active |
| SA6HA-30 | Fairview Microwave | 30 | 0 Hz ~ 6 GHz | 2 | 50 | SMA In-Line Module | Active |
Engineering Selection Recommendations
Full Parametric Equivalents (Recommended for Direct Substitution):
The P1AT-SAMF-18G2W-30 (P1dB Inc) and SA18E-30 (Fairview Microwave) are complete parametric equivalents to the R411830121. Both parts match all specified parameters including the 0 Hz to 18 GHz frequency range. Both substitute parts carry Active product status and are RoHS3 compliant with MSL rating of 1 (Unlimited). These parts are suitable for direct substitution in applications requiring full 18 GHz bandwidth operation.
Frequency-Limited Equivalent (Conditional Substitution):
The SA6HA-30 (Fairview Microwave) matches all parameters except frequency range, which is limited to 0 Hz to 6 GHz. This part is suitable only for applications operating within the 0 Hz to 6 GHz band. The SA6HA-30 is not suitable for substitution in systems requiring operation above 6 GHz.
All substitute parts maintain Active product status and are available in bulk packaging, consistent with the original part specifications.
Frequently Asked Questions (FAQ)
Q: Can the SA6HA-30 be used as a direct replacement for the R411830121?
A: The SA6HA-30 is a parametric equivalent only for applications operating within 0 Hz to 6 GHz. It is not suitable for systems requiring operation above 6 GHz. Verify the maximum operating frequency of your application before selecting this substitute.
Q: What are the critical parameters that determine substitution compatibility?
A: The critical parameters are attenuation value (30dB), impedance (50 ohms), power rating (2W), package type (SMA In-Line Module), and frequency range. All five parameters must be compatible with your application requirements.
Q: Are all substitute parts RoHS compliant?
A: The P1AT-SAMF-18G2W-30, SA18E-30, and SA6HA-30 are all RoHS3 compliant. The original R411830121 does not specify RoHS status in the provided data.
Q: What is the difference between the substitute parts?
A: The P1AT-SAMF-18G2W-30 and SA18E-30 are full parametric equivalents with identical frequency range (0 Hz to 18 GHz). The SA6HA-30 has a reduced frequency range (0 Hz to 6 GHz) and is suitable only for lower-frequency applications.
Q: Are all parts available in the same packaging format?
A: Yes, all parts are supplied as SMA In-Line Modules in bulk packaging, ensuring mechanical and electrical compatibility in system integration.
Q: What inventory levels are available for each substitute part?
A: P1AT-SAMF-18G2W-30 has 860 pieces in stock, SA18E-30 has 1053 pieces in stock, and SA6HA-30 has 1056 pieces in stock. The original R411830121 has 730 pieces in stock.
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