RF Attenuator AT-104(40) Equivalent & Substitute Parts

Part Overview

The AT-104(40) is a 4dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for RF signal conditioning applications across 0 Hz to 18 GHz frequency range. This in-line SMA module provides 1W power handling capability with 50 Ohm impedance matching. The part is currently in Last Time Buy status, making identification of equivalent alternatives essential for ongoing procurement and design continuity. Substitute parts must maintain identical electrical performance characteristics while meeting current availability and compliance requirements.

Substiute Parts

AT-104(40)

Hirose Electric Co LtdIn Stock: 909AT-104(40) Datasheet

Current PartRFQ

AT-104-WP1(40)

Hirose Electric Co LtdIn Stock: 860AT-104-WP1(40) Datasheet

Parametric EquivalentRFQ

CATTEN-04R0

Crystek CorporationIn Stock: 1111CATTEN-04R0 Datasheet

Parametric EquivalentRFQ

R411804124

Radiall USA, Inc.In Stock: 822R411804124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT-104(40) is determined by matching the following critical parameters: attenuation value (4dB), impedance (50 Ohms), power rating (1W), package configuration (SMA In-Line Module), and connector type. Frequency range represents an operational boundary; substitute parts must support the minimum required frequency coverage for the application. All identified substitutes maintain the core electrical specifications and physical form factor required for direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

AT-104-WP1(40) serves as the primary parametric equivalent, offering identical electrical specifications and full frequency range coverage (0 Hz ~ 18 GHz) with Active product status. This Hirose Electric part maintains complete compatibility with existing AT-104(40) designs.

CATTEN-04R0 (Crystek Corporation) provides a functional substitute for applications operating within 0 Hz ~ 3 GHz frequency range. This part meets all core electrical requirements but operates at reduced maximum frequency.

R411804124 (Radiall USA, Inc.) functions as a substitute for applications requiring operation up to 6 GHz. This part satisfies electrical specifications within its frequency envelope but does not support the full 18 GHz capability of the original design.

All substitute options maintain RoHS compliance and equivalent power handling characteristics. Selection should be based on application frequency requirements and current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can AT-104-WP1(40) replace AT-104(40) in all applications? A: Yes. AT-104-WP1(40) maintains identical electrical specifications across the full 0 Hz ~ 18 GHz frequency range and is mechanically compatible as an SMA In-Line Module.

Q: What is the frequency limitation when using CATTEN-04R0? A: CATTEN-04R0 operates to 3 GHz maximum frequency. Applications requiring operation above 3 GHz must use AT-104-WP1(40) or R411804124 (up to 6 GHz).

Q: Are all substitute parts RoHS compliant? A: Yes. AT-104(40) and AT-104-WP1(40) are RoHS Compliant. CATTEN-04R0 and R411804124 are ROHS3 Compliant. All meet current environmental standards.

Q: Do substitute parts use the same SMA connector interface? A: Yes. All listed substitutes are configured as SMA In-Line Modules with identical connector type and physical form factor.

Q: Which substitute should be selected for new designs? A: AT-104-WP1(40) is recommended for new designs, as it provides full frequency coverage (0 Hz ~ 18 GHz) and maintains Active product status with established supply availability.