AT-205(40) RF Attenuator 5dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-205(40) is a 5dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for in-line attenuation applications across 0 Hz to 18 GHz frequency range with 1W power handling capability and 50 Ohm impedance. This component operates in SMA connector configuration as a bulk-packaged module. The part is currently in Last Time Buy status, making identification of equivalent substitute components essential for ongoing procurement and system design continuity.

Substiute Parts

AT-205(40)

Hirose Electric Co LtdIn Stock: 1171AT-205(40) Datasheet

Current PartRFQ

CATTEN-05R0

Crystek CorporationIn Stock: 1151CATTEN-05R0 Datasheet

Parametric EquivalentRFQ

R411805124

Radiall USA, Inc.In Stock: 1210R411805124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the AT-205(40) are qualified based on the following critical parameters that must align for functional equivalence:

• Attenuation Value: 5dB (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: Must encompass or match the operating bandwidth

The two identified substitute parts meet these core electrical and mechanical requirements. Frequency range variations are noted as they represent the maximum operational bandwidth of each component, with the main part AT-205(40) supporting the widest range at 0 Hz ~ 18 GHz.

Parameter Comparison

Engineering Selection Recommendations

Both CATTEN-05R0 and R411805124 are active production components with current availability, providing viable alternatives to the AT-205(40) which is in Last Time Buy status.

CATTEN-05R0 (Crystek Corporation) operates across 0 Hz ~ 3 GHz and carries ROHS3 compliance with REACH Unaffected status. This component is suitable for applications within its specified frequency range.

R411805124 (Radiall USA, Inc.) operates across 0 Hz ~ 4 GHz and carries ROHS3 compliance. This component is suitable for applications within its specified frequency range.

Selection between substitutes should be determined by the specific frequency requirements of the target application. Applications requiring operation above 4 GHz cannot be served by either substitute and would require alternative sourcing strategies.

Frequently Asked Questions (FAQ)

Q: Can CATTEN-05R0 or R411805124 be used as direct replacements for AT-205(40)?

A: Both components share identical attenuation value (5dB), impedance (50 Ohms), power rating (1W), and package type (SMA In-Line Module). Substitution is valid only when the application frequency requirement does not exceed the maximum operating frequency of the substitute part. CATTEN-05R0 is limited to 3 GHz maximum, and R411805124 is limited to 4 GHz maximum.

Q: What is the frequency limitation impact?

A: The AT-205(40) supports operation to 18 GHz. CATTEN-05R0 and R411805124 have reduced frequency ranges at 3 GHz and 4 GHz respectively. Applications operating above these frequency limits cannot use these substitutes.

Q: Are there compliance differences between the main part and substitutes?

A: The AT-205(40) is RoHS Compliant. Both substitutes are ROHS3 Compliant, representing a more recent compliance standard. R411805124 carries REACH Unaffected status. All three components share the same ECCN (EAR99) and HTSUS (8533.21.0090) classifications.

Q: What is the inventory status for each component?

A: AT-205(40) has 1156 pieces in stock (Last Time Buy status). CATTEN-05R0 has 1084 pieces in stock (Active status). R411805124 has 1165 pieces in stock (Active status).

Q: Are there any moisture sensitivity considerations?

A: AT-205(40) has Moisture Sensitivity Level 1 (Unlimited). CATTEN-05R0 and R411805124 both list Moisture Sensitivity Level as Not Applicable.