AT-1103(40) RF Attenuator 3dB 50 Ohm SMA Equivalent & Substitute Parts

Part Overview

The AT-1103(40) is a 3dB RF attenuator manufactured by Hirose Electric Co Ltd, designed for inline attenuation applications across 0 Hz to 8 GHz frequency range with 50 Ohm impedance and 10W power handling capability in SMA connector configuration. This part is currently in Last Time Buy status, making identification of equivalent substitute components essential for ongoing procurement and system design continuity.

Substiute Parts

AT-1103(40)

Hirose Electric Co LtdIn Stock: 1145AT-1103(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

Substitution eligibility for the AT-1103(40) is determined by the following critical parameters:

• Attenuation Value: Must be 3dB
• Impedance: Must be 50 Ohms
• Package / Case: Must be SMA In-Line Module
• Power Rating: Must be minimum 10W
• Frequency Range: Must cover or exceed 0 Hz ~ 8 GHz operating band

The substitute part 5903_SMA-50-010/19-_NE from Huber+Suhner, Inc. meets all mandatory electrical and mechanical parameters. The extended frequency range (0 Hz ~ 18 GHz) provides additional operational margin beyond the AT-1103(40) specification without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 5903_SMA-50-010/19-_NE qualifies as a direct substitute for the AT-1103(40) based on matched electrical specifications and identical mechanical form factor. The substitute part carries Active product status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the original component. Both parts maintain RoHS compliance, with the substitute meeting the more recent ROHS3 standard. The extended frequency range of the substitute (18 GHz vs. 8 GHz) does not introduce incompatibility and provides additional operational headroom for system designs.

Frequently Asked Questions (FAQ)

Q: Can the 5903_SMA-50-010/19-_NE be used as a direct replacement for AT-1103(40)?

A: Yes. Both parts share identical attenuation value (3dB), impedance (50 Ohms), power rating (10W), and SMA In-Line Module package configuration. The substitute's extended frequency range does not affect compatibility within the AT-1103(40) operating band.

Q: What is the significance of the frequency range difference?

A: The AT-1103(40) operates to 8 GHz, while the 5903_SMA-50-010/19-_NE extends to 18 GHz. This difference indicates the substitute part maintains performance specifications across a broader frequency spectrum. For applications limited to 8 GHz and below, both parts perform identically.

Q: Are there mechanical compatibility concerns?

A: No. Both parts use identical SMA In-Line Module packaging, ensuring mechanical interchangeability in existing system designs and PCB layouts.

Q: How do RoHS compliance levels affect selection?

A: Both parts are RoHS compliant. The substitute meets ROHS3, the current standard, while the original meets RoHS. This represents an improvement in environmental compliance standards and does not create compatibility issues.

Q: Why is the AT-1103(40) listed as Last Time Buy?

A: Last Time Buy status indicates the manufacturer is discontinuing production. The 5903_SMA-50-010/19-_NE, with Active status, provides supply continuity for ongoing procurement requirements.