AT-1003(40) RF Attenuator 3dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-1003(40) is a 3dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for in-line attenuation applications across 0 Hz to 8 GHz frequency range with 50 Ohm impedance and 10W power handling capability. This component is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent substitute parts is necessary to ensure continued availability and supply chain continuity for applications requiring this specific attenuation and impedance profile.

Substiute Parts

AT-1003(40)

Hirose Electric Co LtdIn Stock: 1053AT-1003(40) Datasheet

Current PartRFQ

5903_SMA-50-010/19-_NE

Huber+Suhner, Inc.In Stock: 7785903_SMA-50-010/19-_NE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT-1003(40) are identified based on the following critical parameters that must remain constant or exceed the original specification:

• Attenuation Value: 3dB (exact match required)
• Impedance: 50 Ohms (exact match required)
• Power Rating: 10W (minimum requirement)
• Package Type: SMA In-Line Module (exact match required)
• Frequency Range: Must encompass or exceed 0 Hz ~ 8 GHz

The substitute part 5903_SMA-50-010/19-_NE from Huber+Suhner, Inc. meets all substitution criteria with identical attenuation, impedance, power rating, and package configuration. The extended frequency range of 0 Hz ~ 18 GHz provides additional operational capability beyond the original specification.

Parameter Comparison

Engineering Selection Recommendations

The 5903_SMA-50-010/19-_NE from Huber+Suhner, Inc. is a direct functional substitute for the AT-1003(40). Selection of this substitute part is supported by:

• Identical electrical specifications (3dB attenuation, 50 Ohm impedance, 10W power handling)
• Identical mechanical interface (SMA In-Line Module package)
• Active product status ensuring ongoing availability and supply chain support
• ROHS3 compliance exceeding the RoHS compliance of the original part
• Extended frequency range capability (0 Hz ~ 18 GHz) providing operational margin beyond the original 8 GHz specification

Frequently Asked Questions (FAQ)

Q: Can the 5903_SMA-50-010/19-_NE be used as a direct replacement for AT-1003(40)?

A: Yes. Both parts share identical attenuation (3dB), impedance (50 Ohms), power rating (10W), and SMA In-Line Module package configuration. The substitute part meets all electrical and mechanical requirements of the original specification.

Q: What is the significance of the extended frequency range in the substitute part?

A: The 5903_SMA-50-010/19-_NE operates across 0 Hz ~ 18 GHz, compared to the original 0 Hz ~ 8 GHz range. This extended capability provides operational margin and compatibility with higher frequency applications without compromising performance within the original 8 GHz specification window.

Q: Are there any compliance differences between the two parts?

A: The substitute part carries ROHS3 compliance, which represents a more current regulatory standard compared to the RoHS compliance of the original AT-1003(40). Both parts meet environmental and hazardous substance restrictions applicable to electronic components.

Q: Why is the AT-1003(40) classified as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer has discontinued production of this part. The substitute part 5903_SMA-50-010/19-_NE from Huber+Suhner maintains Active product status, ensuring continued availability for new designs and ongoing production requirements.

Q: Are the SMA connectors on both parts mechanically compatible?

A: Yes. Both parts use SMA In-Line Module package configuration, ensuring mechanical compatibility with standard SMA connector interfaces in RF applications.