RF Attenuator AT-115(40) Equivalent & Substitute Parts

Part Overview

The AT-115(40) is an RF attenuator manufactured by Hirose Electric Co Ltd, designed for RF signal attenuation applications requiring 15dB reduction across a broad frequency range. This in-line module operates at 50 Ohms impedance with 1W power handling capability and SMA connectors. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for ongoing procurement and system design continuity.

Substiute Parts

AT-115(40)

Hirose Electric Co LtdIn Stock: 1097AT-115(40) Datasheet

Current PartRFQ

AT-115-WP1(40)

Hirose Electric Co LtdIn Stock: 718AT-115-WP1(40) Datasheet

Parametric EquivalentRFQ

R411815124

Radiall USA, Inc.In Stock: 992R411815124 Datasheet

Parametric EquivalentRFQ

R411816124

Radiall USA, Inc.In Stock: 804R411816124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT-115(40) is determined by matching the following critical parameters: attenuation value (15dB), impedance (50 Ohms), power rating (1W), and package type (SMA In-Line Module). The frequency range represents the operational bandwidth; substitutes with narrower frequency ranges remain functionally equivalent for applications operating within their specified limits.

Two categories of substitutes are identified:

Direct Parametric Equivalent: AT-115-WP1(40) matches all primary electrical and mechanical parameters identically, differing only in product status and packaging designation.

Functional Equivalents with Parameter Variance: R411815124 and R411816124 maintain core electrical specifications (15dB/16dB attenuation, 50 Ohms, 1W) and identical package type, but operate within a reduced frequency range (0 Hz ~ 6 GHz) compared to the original part's 18 GHz upper limit.

Parameter Comparison

Engineering Selection Recommendations

AT-115-WP1(40) is the primary substitute for AT-115(40). Both parts are manufactured by Hirose Electric Co Ltd with identical electrical and mechanical specifications. The AT-115-WP1(40) maintains Active product status, ensuring continued availability and supply chain stability. This part is recommended for direct replacement in all applications currently using AT-115(40).

R411815124 (Radiall USA, Inc.) is a functional equivalent suitable for applications operating within the 0 Hz ~ 6 GHz frequency range. This part maintains 15dB attenuation, 50 Ohm impedance, and 1W power rating. Selection of this part requires confirmation that system operating frequencies do not exceed 6 GHz.

R411816124 (Radiall USA, Inc.) provides 16dB attenuation within the 0 Hz ~ 6 GHz frequency range. The 1dB attenuation increase relative to the original specification must be evaluated for system performance impact. This part is suitable only for applications where the higher attenuation value is acceptable and operating frequencies remain below 6 GHz.

All substitute parts maintain RoHS compliance and identical SMA In-Line Module packaging, ensuring mechanical compatibility with existing connector interfaces.

Frequently Asked Questions (FAQ)

Q: Can AT-115-WP1(40) be used as a direct replacement for AT-115(40)?

A: Yes. Both parts are manufactured by Hirose Electric Co Ltd with identical attenuation (15dB), frequency range (0 Hz ~ 18 GHz), impedance (50 Ohms), power rating (1W), and SMA In-Line Module package type. The AT-115-WP1(40) is the recommended substitute.

Q: What is the primary difference between AT-115(40) and the Radiall substitutes?

A: The Radiall parts (R411815124 and R411816124) operate within a reduced frequency range of 0 Hz ~ 6 GHz, compared to the original part's 0 Hz ~ 18 GHz capability. All other electrical parameters (impedance, power rating, package type) remain equivalent.

Q: Can R411816124 be used in place of AT-115(40)?

A: R411816124 is functionally compatible only if two conditions are met: the application operates exclusively within the 0 Hz ~ 6 GHz frequency range, and the system design accepts 16dB attenuation instead of the specified 15dB.

Q: Are all substitute parts RoHS compliant?

A: Yes. AT-115-WP1(40) is RoHS Compliant. R411815124 and R411816124 are ROHS3 Compliant. All parts meet regulatory requirements for hazardous substance restrictions.

Q: Do the substitute parts use the same connector type?

A: Yes. All parts listed use SMA In-Line Module connectors, ensuring mechanical compatibility with existing RF system interfaces.

Q: Why is AT-115(40) in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this part number. AT-115-WP1(40) is the recommended active alternative from the same manufacturer for continued procurement.