Amphenol SV Microwave M3933/25-75N RF Attenuator

Part Overview

The Amphenol SV Microwave M3933/25-75N is an RF attenuator module designed for high-frequency signal conditioning applications. This SMA in-line module provides 8.5 dB attenuation across a 0 Hz to 18 GHz frequency range with 2W power handling capability and 50-ohm impedance. The component maintains Active product status and full RoHS3 compliance. Alternative equivalent models become necessary when original inventory is unavailable, when last-time-buy conditions approach, or when project requirements demand alternative packaging configurations or source diversification.

Substiute Parts

M3933/25-75N

Amphenol SV MicrowaveIn Stock: 884M3933/25-75N Datasheet

Current PartRFQ

AT-109V

Hirose Electric Co LtdIn Stock: 1050AT-109V Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute relationships for RF attenuators are determined by equivalence across four critical electrical and mechanical parameters: attenuation value, frequency range, power handling, impedance, and physical package configuration. The Hirose Electric Co Ltd AT-109V represents a parametrically equivalent substitute with the following alignment:

Key Substitution Parameters:

• Frequency Range: Both 0 Hz ~ 18 GHz (exact match)
• Power Handling: Both 2W (exact match)
• Impedance: Both 50 Ohms (exact match)
• Package Type: Both SMA In-Line Module (exact match)
• Attenuation Value: 9 dB (substitute) vs 8.5 dB (original)

The attenuation value variation of 0.5 dB falls within acceptable engineering tolerance for RF signal conditioning applications. Both components maintain identical frequency response characteristics and power specifications across the microwave frequency spectrum.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: Amphenol SV Microwave M3933/25-75N

The original M3933/25-75N maintains Active product status with full RoHS3 compliance. This component demonstrates continued availability and support from the primary manufacturer. Selection of the original part is appropriate for applications where exact attenuation specification (8.5 dB) is critical and where long-term supply continuity is required.

Substitute Selection: Hirose Electric Co Ltd AT-109V

The AT-109V provides electrical and mechanical equivalence with identical frequency, power, impedance, and package specifications. This substitute carries RoHS compliance certification and matches the EAR99 export classification. Substitution is suitable where the 0.5 dB attenuation variance (9 dB vs 8.5 dB) is acceptable within system design tolerances. The Last Time Buy status of this component indicates a defined supply window and requires advance procurement planning.

Both components share identical HTSUS classification and export control designation, supporting direct substitution for regulated supply chain requirements.

Frequently Asked Questions (FAQ)

Q: What makes the Hirose AT-109V compatible with the Amphenol M3933/25-75N?

A: Both components match across all critical RF attenuator parameters: 0 Hz to 18 GHz frequency coverage, 2W power handling, 50-ohm impedance, and SMA in-line module packaging. The attenuation differential of 0.5 dB falls within standard engineering substitution tolerance for RF signal conditioning circuits.

Q: Does the packaging difference (Bag vs Bulk) affect electrical performance?

A: Packaging designation reflects procurement and logistics configuration only. Bag and Bulk packaging contain identical electronic components with identical electrical specifications. Selection between packaging options depends on quantity requirements and inventory management protocols rather than performance characteristics.

Q: Can I substitute the AT-109V in applications where exact 8.5 dB attenuation is specified?

A: The AT-109V provides 9 dB attenuation rather than 8.5 dB. Circuit-level compatibility depends on whether the design specification permits 0.5 dB variation. Review system gain margin and signal level requirements to determine substitution feasibility. The attenuation difference represents a 5.9% variance from the original specification.

Q: What is the significance of the AT-109V Last Time Buy status?

A: Last Time Buy designation indicates the manufacturer has announced production discontinuation with a defined supply window. Procurement of AT-109V requires accelerated ordering to secure inventory before the component transitions to obsolescence. The M3933/25-75N Active status ensures ongoing availability without timeline constraints.

Q: Are both components suitable for export under EAR99 classification?

A: Both the M3933/25-75N and AT-109V carry EAR99 designation, indicating they do not require individual export licenses under the Export Administration Regulations. Both components share identical HTSUS tariff classification (8533.21.0090), supporting consistent regulatory treatment across supply chain operations.