AT-320(40) RF Attenuator 20dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-320(40) is a 20dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation applications across 0 Hz to 18 GHz with 50 Ohm impedance and 1W power handling. This part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure continued availability and supply chain continuity for applications requiring 20dB attenuation in the specified frequency and power range.

Substiute Parts

AT-320(40)

Hirose Electric Co LtdIn Stock: 1074AT-320(40) Datasheet

Current PartRFQ

AT-120-WP1(40)

Hirose Electric Co LtdIn Stock: 1118AT-120-WP1(40) Datasheet

Parametric EquivalentRFQ

6820.19.A

Huber+Suhner, Inc.In Stock: 10356820.19.A Datasheet

Parametric EquivalentRFQ

R411820124

Radiall USA, Inc.In Stock: 753R411820124 Datasheet

Parametric EquivalentRFQ

R413V20000

Radiall USA, Inc.In Stock: 943R413V20000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT-320(40) are qualified based on the following critical parameters:

• Attenuation Value: 20dB (exact match required)
• Impedance: 50 Ohms (exact match required)
• Power Rating: 1W (exact match required)
• Package / Case: SMA In-Line Module (exact match required)
• Frequency Range: Minimum coverage of 0 Hz ~ 18 GHz or greater

Parts meeting these criteria are considered parametric equivalents and direct substitutes. Frequency range extensions beyond 18 GHz do not disqualify a part; however, frequency ranges below 18 GHz maximum require evaluation for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Full Compatibility): AT-120-WP1(40) from Hirose Electric Co Ltd is the recommended primary substitute. It matches all critical parameters including frequency range (0 Hz ~ 18 GHz), maintains Active product status, and carries equivalent RoHS Compliant certification. This part provides direct functional replacement with no operational limitations.

Secondary Substitutes (Conditional Compatibility): 6820.19.A from Huber+Suhner, Inc. meets all electrical and mechanical parameters with Active status. Compliance certifications differ; verify REACH and RoHS requirements for your application.

R413V20000 from Radiall USA, Inc. exceeds frequency range requirements (0 Hz ~ 67 GHz) and carries ROHS3 Compliant status. This part is suitable for applications requiring extended frequency coverage.

Limited Compatibility: R411820124 from Radiall USA, Inc. has a restricted frequency range (0 Hz ~ 6 GHz), which is below the AT-320(40) specification of 18 GHz. This part is suitable only for applications operating within 0 Hz ~ 6 GHz bandwidth.

Frequently Asked Questions (FAQ)

Q: Can R411820124 replace AT-320(40) in all applications? A: No. R411820124 operates only to 6 GHz maximum, while AT-320(40) is specified to 18 GHz. Use R411820124 only in applications with frequency requirements not exceeding 6 GHz.

Q: What is the difference between AT-320(40) and AT-120-WP1(40)? A: Both parts are 20dB, 50 Ohm, 1W SMA In-Line Module attenuators with identical frequency range (0 Hz ~ 18 GHz). AT-120-WP1(40) is Active status, while AT-320(40) is Last Time Buy. AT-120-WP1(40) is the direct replacement.

Q: Are all substitute parts RoHS compliant? A: AT-120-WP1(40) and R411820124 and R413V20000 carry RoHS or ROHS3 compliance. Verify compliance documentation for 6820.19.A with your supplier.

Q: Can I use R413V20000 if my application only requires 18 GHz coverage? A: Yes. R413V20000 operates from 0 Hz ~ 67 GHz, which fully covers the 18 GHz requirement. Extended frequency capability does not limit functionality at lower frequencies.

Q: What packaging is available for these substitute parts? A: All substitute parts are supplied in SMA In-Line Module package format, matching AT-320(40) mechanical specifications.