AT-120(40) RF Attenuator 20dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-120(40) is a 20dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation applications across 0 Hz to 18 GHz frequency range with 50 Ohm impedance and 1W power handling capability in SMA connector configuration. This part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure continued availability and maintain system compatibility for new designs or replacement requirements.

Substiute Parts

AT-120(40)

Hirose Electric Co LtdIn Stock: 865AT-120(40) Datasheet

Current PartRFQ

AT-120-WP1(40)

Hirose Electric Co LtdIn Stock: 1118AT-120-WP1(40) Datasheet

Parametric EquivalentRFQ

6820.19.A

Huber+Suhner, Inc.In Stock: 10356820.19.A Datasheet

Parametric EquivalentRFQ

R411820124

Radiall USA, Inc.In Stock: 753R411820124 Datasheet

Parametric EquivalentRFQ

R413V20000

Radiall USA, Inc.In Stock: 943R413V20000 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT-120(40) is determined by matching the following critical parameters: 20dB attenuation value, 50 Ohm impedance, 1W power rating, and SMA In-Line Module package configuration. Frequency range compatibility must be evaluated based on application requirements. Parts meeting these core electrical and mechanical specifications are classified as parametric equivalents.

The substitute parts identified fall into two categories based on frequency range coverage:

Full-Range Coverage (0 Hz ~ 18 GHz or higher): Parts that match or exceed the original frequency specification.

Limited-Range Coverage (0 Hz ~ 6 GHz): Parts with reduced frequency range that require application-specific validation.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: AT-120-WP1(40) from Hirose Electric Co Ltd is the direct equivalent with identical electrical specifications and frequency range. This part maintains Active product status and RoHS compliance, providing the most straightforward replacement path.

Alternative Substitutes with Full Frequency Coverage: 6820.19.A (Huber+Suhner) and R413V20000 (Radiall USA) both provide 20dB attenuation across 0 Hz ~ 18 GHz or extended frequency range with 1W power and 50 Ohm impedance in SMA In-Line Module configuration. Both are Active products.

Limited-Range Alternative: R411820124 (Radiall USA) provides 20dB attenuation with 1W power and 50 Ohm impedance but is restricted to 0 Hz ~ 6 GHz frequency range. This part is suitable only for applications operating within this frequency band.

Frequently Asked Questions (FAQ)

Q: Can AT-120-WP1(40) directly replace AT-120(40)?

A: Yes. Both parts share identical electrical parameters (20dB attenuation, 0 Hz ~ 18 GHz frequency range, 1W power, 50 Ohm impedance) and SMA In-Line Module package configuration. AT-120-WP1(40) is the active production equivalent.

Q: What is the difference between the Radiall substitutes R411820124 and R413V20000?

A: Both provide 20dB attenuation, 1W power, and 50 Ohm impedance in SMA In-Line Module configuration. R411820124 operates to 6 GHz, while R413V20000 extends to 67 GHz. Selection depends on application frequency requirements.

Q: Is R411820124 suitable for all AT-120(40) applications?

A: R411820124 is suitable only for applications operating within 0 Hz ~ 6 GHz. Applications requiring the full 0 Hz ~ 18 GHz range of the original part require alternatives with matching or extended frequency specifications.

Q: Are all substitutes RoHS compliant?

A: AT-120(40), AT-120-WP1(40), R411820124, and R413V20000 are RoHS compliant. RoHS status for 6820.19.A is not specified in available documentation.

Q: What packaging options are available?

A: All identified substitutes are supplied in SMA In-Line Module package configuration, matching the original AT-120(40) mechanical form factor.