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AT-403(40) RF Attenuator 3dB 50 Ohm N-Type Equivalent & Substitute Parts
Part Overview
The AT-403(40) is a 3dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation applications across 0 Hz to 13 GHz with 50 Ohm impedance and 2W power handling. This part is designated as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to maintain system compatibility and ensure continued availability for new designs and field replacements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Attenuation Value | 3dB |
| Frequency Range | 0 Hz ~ 13 GHz |
| Power Rating | 2W |
| Impedance | 50 Ohms |
| Package Type | N-Type In-Line Module |
| RoHS Status | RoHS Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by matching the following core parameters: attenuation value (3dB), impedance (50 Ohms), power rating (2W), and connector type (N-Type In-Line Module). Frequency range compatibility is evaluated based on application requirements; parts with equal or extended frequency coverage are considered suitable substitutes. All listed substitutes maintain identical attenuation, impedance, power, and package specifications as the main part.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Attenuation | Frequency Range | Power (W) | Impedance | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| AT-403(40) | Hirose Electric Co Ltd | 3dB | 0 Hz ~ 13 GHz | 2W | 50 Ohms | N-Type In-Line Module | Last Time Buy | RoHS Compliant |
| 6803.17.A | Huber+Suhner, Inc. | 3dB | 0 Hz ~ 12.4 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | ROHS3 Compliant |
| 6803.17.B | Huber+Suhner, Inc. | 3dB | 0 Hz ~ 18 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | Not Specified |
| 6803_N-50-1/1--_NE | Huber+Suhner, Inc. | 3dB | 0 Hz ~ 6 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | ROHS3 Compliant |
| ATT-0218-03-NNN-02 | Cinch Connectivity Solutions Midwest Microwave | 3dB | 0 Hz ~ 12.4 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | RoHS Compliant |
| ATT-0219-03-NNN-02 | Cinch Connectivity Solutions Midwest Microwave | 3dB | 0 Hz ~ 18 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | ROHS3 Compliant |
| ATT-0389-03-NNN-02 | Cinch Connectivity Solutions Midwest Microwave | 3dB | 0 Hz ~ 18 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | RoHS Compliant |
| R412703000 | Radiall USA, Inc. | 3dB | 0 Hz ~ 2 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | ROHS3 Compliant |
| R414703000 | Radiall USA, Inc. | 3dB | 0 Hz ~ 12.4 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | ROHS3 Compliant |
| R414703150 | Radiall USA, Inc. | 3dB | 0 Hz ~ 18 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | ROHS3 Compliant |
| R414703161 | Radiall USA, Inc. | 3dB | 0 Hz ~ 18 GHz | 2W | 50 Ohms | N-Type In-Line Module | Active | Not Specified |
Engineering Selection Recommendations
All listed substitute parts maintain active product status and are available in production quantities. Parts with extended frequency coverage (0 Hz ~ 18 GHz) including ATT-0219-03-NNN-02, ATT-0389-03-NNN-02, R414703150, and R414703161 provide full compatibility with the AT-403(40) across its entire operating range and beyond. Parts with matching or narrower frequency ranges (6803.17.A, ATT-0218-03-NNN-02, R414703000) are suitable for applications operating within their specified frequency limits. The 6803_N-50-1/1--_NE and R412703000 are limited to lower frequency applications and should be selected only when system requirements do not exceed their maximum frequency specifications. ROHS3 compliant alternatives are preferred for new designs requiring enhanced environmental compliance.
Frequently Asked Questions (FAQ)
Q: Can I substitute the AT-403(40) with any of these parts? A: Substitution is valid only when the application frequency range does not exceed the substitute part's maximum frequency specification. All listed parts share identical attenuation (3dB), impedance (50 Ohms), power rating (2W), and N-Type connector configuration.
Q: What is the difference between parts with different frequency ranges? A: Frequency range indicates the upper limit of flat attenuation performance. Parts rated to 18 GHz (ATT-0219-03-NNN-02, ATT-0389-03-NNN-02, R414703150, R414703161) provide the broadest compatibility. Parts with lower frequency ratings (2 GHz, 6 GHz, 12.4 GHz) are optimized for narrower bandwidth applications and should not be used in systems requiring operation above their specified limits.
Q: Are all substitutes mechanically compatible? A: Yes. All substitute parts use N-Type In-Line Module packaging, ensuring mechanical and electrical interface compatibility with the AT-403(40).
Q: Which substitutes have the best compliance certifications? A: Parts with ROHS3 Compliant status (6803.17.A, 6803_N-50-1/1--_NE, ATT-0219-03-NNN-02, R412703000, R414703000, R414703150) meet current environmental compliance requirements. Parts with RoHS Compliant status (ATT-0218-03-NNN-02, ATT-0389-03-NNN-02) also meet compliance but may not include ROHS3 enhancements.
Q: What inventory levels are available? A: Current stock levels range from 682 to 1165 pieces across all substitute options, with ATT-0219-03-NNN-02 offering the highest availability at 1040 pieces.
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