RF Attenuator AT-300-(0)(40) Equivalent & Substitute Parts

Part Overview

The AT-300-(0)(40) is an RF attenuator manufactured by Hirose Electric Co Ltd, designed for 0 dB 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 and substitute components essential for procurement planning and design continuity.

Substiute Parts

AT-300-(0)(40)

Hirose Electric Co LtdIn Stock: 868AT-300-(0)(40) Datasheet

Current PartRFQ

AT-100-(0)-WP1(40)

Hirose Electric Co LtdIn Stock: 1050AT-100-(0)-WP1(40) Datasheet

Parametric EquivalentRFQ

R411800124

Radiall USA, Inc.In Stock: 1208R411800124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT-300-(0)(40) are identified based on matching the following critical parameters: 0 dB attenuation value, 50 Ohm impedance, 1W power rating, and SMA in-line module package configuration. The frequency range and product status are secondary considerations that may vary within acceptable operational boundaries.

Two substitute parts meet these core electrical and mechanical requirements:

1. AT-100-(0)-WP1(40) by Hirose Electric Co Ltd: Parametric equivalent with identical attenuation, impedance, power rating, and package type. Frequency range matches at 0 Hz ~ 18 GHz. Product status is Active.

2. R411800124 by Radiall USA, Inc.: Parametric equivalent with identical attenuation, impedance, power rating, and package type. Frequency range is 0 Hz ~ 6 GHz, which is a subset of the original part's range.

Parameter Comparison

Engineering Selection Recommendations

AT-100-(0)-WP1(40) is the primary substitute for AT-300-(0)(40). Both parts are manufactured by Hirose Electric Co Ltd, share identical electrical specifications (0 dB attenuation, 50 Ohm impedance, 1W power), and support the full 0 Hz ~ 18 GHz frequency range. The AT-100 series is in Active product status, ensuring long-term availability and supply chain stability. RoHS compliance is confirmed for both parts.

R411800124 by Radiall USA, Inc. is a secondary substitute suitable only for applications operating within the 0 Hz ~ 6 GHz frequency band. While it matches all core electrical parameters and package configuration, its frequency range limitation restricts its use to lower-frequency applications. This part is in Active status with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can AT-100-(0)-WP1(40) be used as a direct replacement for AT-300-(0)(40)?

A: Yes. Both parts share identical attenuation (0 dB), impedance (50 Ohms), power rating (1W), package type (SMA in-line module), and frequency range (0 Hz ~ 18 GHz). The AT-100 series is in Active status, providing superior long-term availability compared to the Last Time Buy status of the AT-300.

Q: What is the limitation of R411800124 as a substitute?

A: The R411800124 operates within a 0 Hz ~ 6 GHz frequency range, compared to the AT-300's 0 Hz ~ 18 GHz range. This part is suitable only for applications that do not require operation above 6 GHz.

Q: Are all substitute parts RoHS compliant?

A: AT-300-(0)(40) and AT-100-(0)-WP1(40) are confirmed RoHS Compliant. RoHS compliance status for R411800124 is not specified in available documentation.

Q: What is the difference between the AT-300 and AT-100 series?

A: Both series are manufactured by Hirose Electric Co Ltd and share identical electrical and mechanical specifications for this 0 dB configuration. The primary difference is product lifecycle status: AT-300 is Last Time Buy, while AT-100 is Active.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the application frequency requirements do not exceed the substitute part's specified range. All three parts use SMA in-line module packaging and are mechanically compatible.