RF Attenuator AT-101(40) Equivalent & Substitute Parts

Part Overview

The AT-101(40) is a 1dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation in 50-ohm RF systems operating from DC to 18 GHz. This component handles 1W of power and is housed in an SMA connector package. The part is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure continued availability and system compatibility for new designs or replacement inventory.

Substiute Parts

AT-101(40)

Hirose Electric Co LtdIn Stock: 968AT-101(40) Datasheet

Current PartRFQ

AT-101-WP1(40)

Hirose Electric Co LtdIn Stock: 977AT-101-WP1(40) Datasheet

Parametric EquivalentRFQ

CATTEN-01R0

Crystek CorporationIn Stock: 874CATTEN-01R0 Datasheet

Parametric EquivalentRFQ

R411801124

Radiall USA, Inc.In Stock: 994R411801124 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT-101(40) are qualified based on matching the following critical parameters: 1dB attenuation value, 50-ohm impedance, 1W power handling, and SMA in-line module packaging. Frequency range variations are permitted within the operational envelope of the application, as long as the substitute part covers the required frequency band. All substitute parts listed maintain RoHS or ROHS3 compliance status.

Three substitute parts meet these criteria:

• AT-101-WP1(40) by Hirose Electric Co Ltd: Full parametric match with identical frequency range (0 Hz ~ 18 GHz) and active product status
• CATTEN-01R0 by Crystek Corporation: Matches attenuation, power, impedance, and package; frequency range limited to 0 Hz ~ 3 GHz
• R411801124 by Radiall USA, Inc.: Matches attenuation, power, impedance, and package; frequency range limited to 0 Hz ~ 6 GHz

Parameter Comparison

Engineering Selection Recommendations

For applications requiring the full 0 Hz ~ 18 GHz frequency range of the original AT-101(40), the AT-101-WP1(40) is the direct equivalent. This part is manufactured by the same supplier, maintains identical electrical specifications, and carries active product status, ensuring long-term availability.

For applications operating within 0 Hz ~ 6 GHz, the R411801124 by Radiall USA, Inc. provides an alternative with ROHS3 compliance and active status.

For applications limited to 0 Hz ~ 3 GHz, the CATTEN-01R0 by Crystek Corporation is suitable and carries ROHS3 compliance.

All substitute parts maintain the required 1dB attenuation, 50-ohm impedance, 1W power rating, and SMA in-line module package configuration.

Frequently Asked Questions (FAQ)

Q: Can CATTEN-01R0 or R411801124 be used as direct replacements for AT-101(40) in all applications?

A: Only if your application operates within their respective frequency ranges. CATTEN-01R0 is limited to 0 Hz ~ 3 GHz, and R411801124 to 0 Hz ~ 6 GHz. If your system requires operation above these limits, AT-101-WP1(40) is the appropriate substitute.

Q: What is the difference between AT-101(40) and AT-101-WP1(40)?

A: Both parts are manufactured by Hirose Electric Co Ltd and share identical electrical and mechanical specifications. The primary difference is product status: AT-101(40) is Last Time Buy, while AT-101-WP1(40) is Active. For new designs and ongoing production, AT-101-WP1(40) is recommended.

Q: Are all substitute parts RoHS compliant?

A: Yes. AT-101(40) and AT-101-WP1(40) carry RoHS Compliant status. CATTEN-01R0 and R411801124 carry ROHS3 Compliant status. All meet environmental compliance requirements.

Q: Do these parts require any mechanical modifications for installation?

A: No. All listed parts use identical SMA in-line module packaging and are mechanically interchangeable within their qualified frequency ranges.

Q: Which substitute should I choose for new designs?

A: AT-101-WP1(40) is the recommended choice for new designs, as it provides full frequency coverage matching the original AT-101(40) and maintains active product status for long-term supply assurance.