RF Attenuator AT-109(40) Equivalent & Substitute Parts

Part Overview

The AT-109(40) is a 9dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for RF signal attenuation across 0 Hz to 18 GHz frequency range with 50 Ohm impedance and 1W power handling capability in an SMA in-line module configuration. This part is currently in Last Time Buy status, making identification of equivalent substitute parts essential for ongoing procurement and system design continuity. Equivalent alternatives maintain the core electrical specifications while offering different manufacturer options and product lifecycle statuses.

Substiute Parts

AT-109(40)

Hirose Electric Co LtdIn Stock: 1196AT-109(40) Datasheet

Current PartRFQ

AT-109-WP1(40)

Hirose Electric Co LtdIn Stock: 733AT-109-WP1(40) Datasheet

Parametric EquivalentRFQ

CATTEN-09R0

Crystek CorporationIn Stock: 778CATTEN-09R0 Datasheet

Parametric EquivalentRFQ

R411809124

Radiall USA, Inc.In Stock: 1083R411809124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT-109(40) are qualified based on matching the following critical parameters: 9dB attenuation value, 50 Ohm impedance, 1W power rating, and SMA in-line module package configuration. Frequency range variations are noted as a secondary parameter that may affect application suitability within specific frequency bands. All listed substitutes maintain electrical compatibility within their specified frequency ranges and comply with applicable regulatory standards.

Parameter Comparison

Engineering Selection Recommendations

AT-109-WP1(40) (Hirose Electric Co Ltd): Direct parametric equivalent with identical frequency range (0 Hz ~ 18 GHz) and active product status. Recommended as primary substitute for applications requiring full 18 GHz bandwidth coverage. RoHS compliant with unlimited moisture sensitivity rating.

CATTEN-09R0 (Crystek Corporation): Parametric equivalent with frequency range limited to 0 Hz ~ 3 GHz. Suitable for applications operating within this bandwidth. Active product status with ROHS3 compliance. Inventory availability at 754 units.

R411809124 (Radiall USA, Inc.): Parametric equivalent with frequency range of 0 Hz ~ 4 GHz. Applicable for applications within this frequency band. Active product status with 1054 units in stock.

Selection should prioritize AT-109-WP1(40) for applications requiring the full 18 GHz frequency range of the original AT-109(40). Alternative substitutes are suitable only when application frequency requirements fall within their specified ranges.

Frequently Asked Questions (FAQ)

Q: Can CATTEN-09R0 or R411809124 be used as direct replacements for AT-109(40)?

A: These parts are parametric equivalents only within their specified frequency ranges. CATTEN-09R0 operates to 3 GHz and R411809124 to 4 GHz, compared to AT-109(40) at 18 GHz. Use these substitutes only if your application operates within their frequency limits.

Q: What is the difference between AT-109(40) and AT-109-WP1(40)?

A: Both parts are manufactured by Hirose Electric Co Ltd with identical electrical specifications and frequency range (0 Hz ~ 18 GHz). AT-109-WP1(40) has active product status, while AT-109(40) is Last Time Buy. AT-109-WP1(40) is the recommended long-term substitute.

Q: Are all substitute parts RoHS compliant?

A: AT-109(40) and AT-109-WP1(40) are RoHS Compliant. CATTEN-09R0 is ROHS3 Compliant. RoHS status for R411809124 is not specified in available documentation.

Q: Do all parts use the same SMA connector type?

A: All listed parts use SMA in-line module package configuration, ensuring mechanical compatibility in standard SMA-based RF systems.

Q: Which substitute has the highest inventory availability?

A: R411809124 (Radiall) has 1054 units in stock, followed by CATTEN-09R0 (Crystek) with 754 units, and AT-109-WP1(40) (Hirose) with 673 units.