AT-520(40) RF Attenuator 20dB 50 Ohm BNC Equivalent & Substitute Parts

Part Overview

The AT-520(40) is a 20dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline RF signal attenuation across 0 Hz to 4 GHz frequency range with 50 Ohm impedance and 2W power handling capability. This component operates in BNC connector configuration for direct integration into RF systems. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent substitute parts ensures continued system availability and supply chain continuity for applications requiring this attenuation specification.

Substiute Parts

AT-520(40)

Hirose Electric Co LtdIn Stock: 1240AT-520(40) Datasheet

Current PartRFQ

CATTEN-0200-BNC

Crystek CorporationIn Stock: 1224CATTEN-0200-BNC Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT-520(40) is determined by strict equivalence across the following critical parameters:

• Attenuation Value: Must be 20dB (no tolerance variation permitted)
• Impedance: Must be 50 Ohms (RF system standard)
• Package / Case: Must be BNC In-Line Module (mechanical and electrical interface requirement)
• Power Rating: Must be minimum 2W (thermal and reliability requirement)
• RoHS Compliance: Must meet RoHS requirements for regulatory alignment

The CATTEN-0200-BNC from Crystek Corporation meets all mandatory substitution criteria. Frequency range variation (0 Hz ~ 1 GHz vs. 0 Hz ~ 4 GHz) represents a functional limitation that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The CATTEN-0200-BNC qualifies as a parametric equivalent for the AT-520(40) based on matching attenuation, impedance, power rating, package configuration, and RoHS compliance status. The substitute part is currently in Active production status, providing supply continuity for applications transitioning from the Last Time Buy AT-520(40).

Selection of CATTEN-0200-BNC requires verification that application operating frequency does not exceed 1 GHz. For systems requiring full 0 Hz to 4 GHz operation, the frequency range limitation of the substitute part necessitates alternative sourcing or design modification.

Frequently Asked Questions (FAQ)

Q: Can CATTEN-0200-BNC directly replace AT-520(40) in all applications?

A: Direct replacement is valid only for applications operating within the 0 Hz to 1 GHz frequency range. The substitute part's maximum frequency specification is 1 GHz, compared to the original part's 4 GHz capability. Applications requiring frequencies above 1 GHz require alternative components.

Q: Are the BNC connector interfaces mechanically identical?

A: Both parts use BNC In-Line Module package configuration, ensuring mechanical compatibility for connector mating and system integration.

Q: What is the difference between RoHS and ROHS3 compliance?

A: Both designations indicate RoHS compliance. ROHS3 represents the current RoHS 3 directive standard. Both parts meet regulatory requirements for hazardous substance restriction.

Q: Is the 2W power rating identical between both parts?

A: Yes, both AT-520(40) and CATTEN-0200-BNC are rated for 2W continuous power handling, ensuring equivalent thermal performance in equivalent operating conditions.

Q: Why is AT-520(40) in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has discontinued production. CATTEN-0200-BNC, currently in Active status, represents the available substitute for continued procurement.