M3933/25-54S

Overview

The M3933/25-54S is a connectorized RF attenuator manufactured by Cinch Connectivity Solutions under the Midwest Microwave brand. It provides a fixed attenuation value of 40 dB with a power rating of 2 W. The device operates within a frequency range of 0 Hz to 12.4 GHz and maintains a 50 Ohm impedance. It utilizes SMA connectors in an inline module configuration. The component is qualified to MIL-DTL-M3933 standards, supporting operation from -55°C to +125°C.

Feature Summary

• MIL-DTL-M3933 Qualified Product List (QPL) compliance for defense applications
• Fixed 40 dB attenuation precision in a compact inline module form factor
• Wideband performance extending up to 12.4 GHz with stable impedance
• Robust construction rated for extreme environmental temperatures

Applications

• Military radio systems requiring precise signal level control
• Aerospace test and measurement instrumentation setups
• Defense communication equipment signal conditioning
• Harsh environment RF circuit protection and calibration

Procurement Notes

Verify that the specific order includes QPL screening documentation as specified in the manufacturer datasheet. Confirm that the SMA connector gender matches the system interface requirements. Ensure that the 2 W power handling capability aligns with the peak power levels present in the target application circuit to prevent component damage during operation.

Selection Notes

Select this model when a high-precision 40 dB fixed attenuation is required within the 12.4 GHz bandwidth. Consider the SMA interface compatibility and the 50 Ohm system impedance. Evaluate the thermal management needs given the -55°C to +125°C operating range and the 2 W power dissipation limit for reliable long-term performance in demanding environments.

Part Context

This part belongs to the M3933/25 series of connectorized attenuators designed for military and aerospace use. The series offers various attenuation values while maintaining consistent electrical performance and rugged mechanical characteristics. It represents a standardized solution for integrating precise RF attenuation into shielded or open-frame military electronic assemblies.

Replacement Considerations

Compatible substitutes include other M3933/25 series variants such as M3933/25-62N or M3933/25-34N, provided the attenuation value difference is acceptable for the circuit design. Verify that any replacement maintains the same SMA interface, 50 Ohm impedance, and MIL-DTL-M3933 qualification status.