RF Attenuator AT-201(40) Equivalent & Substitute Parts

Part Overview

The AT-201(40) is a 1dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation in 50-ohm RF systems operating across DC to 18 GHz. This component is classified as Last Time Buy, indicating discontinued production. Identifying equivalent substitute parts is necessary to maintain supply chain continuity for applications requiring this attenuation specification and frequency range.

Substiute Parts

AT-201(40)

Hirose Electric Co LtdIn Stock: 973AT-201(40) Datasheet

Current PartRFQ

AT-101-WP1(40)

Hirose Electric Co LtdIn Stock: 977AT-101-WP1(40) Datasheet

Parametric EquivalentRFQ

CATTEN-01R0

Crystek CorporationIn Stock: 874CATTEN-01R0 Datasheet

Parametric EquivalentRFQ

R411801124

Radiall USA, Inc.In Stock: 994R411801124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT-201(40) is determined by matching the following critical parameters: attenuation value (1dB), impedance (50 Ohms), power rating (1W), package type (SMA In-Line Module), and connector interface. Frequency range compatibility is evaluated on an application-specific basis, as substitute parts may operate within narrower frequency bands while maintaining the core attenuation and impedance specifications.

Three parametric equivalent parts meet the primary electrical and mechanical requirements:

• AT-101-WP1(40) by Hirose Electric Co Ltd: Full frequency range match (0 Hz ~ 18 GHz)
• CATTEN-01R0 by Crystek Corporation: Reduced frequency range (0 Hz ~ 3 GHz)
• R411801124 by Radiall USA, Inc.: Intermediate frequency range (0 Hz ~ 6 GHz)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: AT-101-WP1(40)

The AT-101-WP1(40) is the optimal substitute for the AT-201(40). Both parts are manufactured by Hirose Electric Co Ltd and share identical electrical specifications and frequency range coverage (0 Hz ~ 18 GHz). The AT-101-WP1(40) maintains Active product status, ensuring continued availability and supply chain support. Both parts meet RoHS compliance requirements.

Secondary Substitutes: CATTEN-01R0 and R411801124

These parts are suitable only for applications operating within their respective frequency ranges. CATTEN-01R0 is limited to 0 Hz ~ 3 GHz operation, while R411801124 extends to 0 Hz ~ 6 GHz. Both maintain Active status and meet ROHS3 compliance. Selection between these options depends on the maximum operating frequency required by the application.

Frequently Asked Questions (FAQ)

Q: Can AT-101-WP1(40) be used as a direct replacement for AT-201(40)?

A: Yes. Both parts share identical attenuation (1dB), frequency range (0 Hz ~ 18 GHz), power rating (1W), impedance (50 Ohms), and SMA In-Line Module packaging. The AT-101-WP1(40) is the direct equivalent with Active product status.

Q: What is the frequency limitation of CATTEN-01R0?

A: CATTEN-01R0 operates from 0 Hz to 3 GHz. It is suitable only for applications within this frequency band. Applications requiring operation above 3 GHz must use AT-101-WP1(40) or R411801124.

Q: Are all substitute parts RoHS compliant?

A: Yes. AT-201(40) and AT-101-WP1(40) are RoHS Compliant. CATTEN-01R0 and R411801124 are ROHS3 Compliant. All parts meet applicable RoHS requirements.

Q: Do all substitute parts use the same SMA connector interface?

A: Yes. All listed parts use SMA In-Line Module packaging, ensuring mechanical and electrical compatibility at the connector level.

Q: Why is AT-201(40) marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. AT-101-WP1(40) is the recommended active alternative from the same manufacturer.