M3933/25-75S

Overview

The M3933/25-75S is a fixed RF attenuator manufactured by Amphenol SV Microwave, designed for high-frequency applications up to 18 GHz. It features SMA male-to-female connectors and maintains a 50-ohm impedance. The component provides an attenuation value of 8.5 dB. It is classified as a screened variant within the M3933 series, indicating specific shielding characteristics suitable for military specifications. The device operates as a connectorized attenuator, integrating the attenuation function directly into the connector interface.

Feature Summary

• Provides fixed signal attenuation with SMA male to female interface configuration
• Operates effectively in frequency ranges extending up to 18 GHz
• Features screened construction for enhanced electromagnetic interference protection
• Maintains standard 50-ohm system impedance for signal integrity

Applications

• Military radio systems requiring precise signal level control
• Test and measurement equipment operating at microwave frequencies
• Avionics communication subsystems needing signal attenuation
• Radar system components requiring fixed loss insertion

Procurement Notes

Verify the specific screening requirements against project specifications, as this model denotes a screened variant. Confirm that the SMA gender combination matches the circuit design needs. Ensure environmental ratings meet operational extremes if deployed in harsh conditions. Cross-reference the exact attenuation tolerance with schematic requirements before finalizing procurement orders.

Selection Notes

Select this component when a fixed 8.5 dB loss is required within an 18 GHz bandwidth. Choose the screened version over non-screened variants if EMI mitigation is critical. Ensure compatibility with existing SMA infrastructure. Consider power handling capabilities relative to the system's maximum output levels to prevent damage during operation.

Part Context

This part belongs to the M3933 series of RF attenuators from Amphenol SV Microwave. The series includes various attenuation values and connector configurations. The '75' suffix typically indicates the specific attenuation value within the product line. These components are generally built to meet rigorous military standards for reliability and performance in demanding environments.

Replacement Considerations

Direct substitutes include other M3933/25-XXS models with different attenuation values if the loss requirement changes. Non-screened equivalents like M3933/25-64N may be considered if shielding is not mandatory. Verify connector gender and frequency limits match exactly when sourcing alternatives.