M3933/25-52S

Overview

The M3933/25-52S is a fixed RF attenuator manufactured by Cinch Connectivity Solutions under the Midwest Microwave brand. It features SMA connectors and provides a nominal attenuation of 30 dB. The device operates within a frequency range of 0 Hz to 12.4 GHz and supports a maximum power rating of 2 W. Designed for rugged environments, it functions between -55 °C and +125 °C. This component complies with MIL-DTL-M3933 standards and is classified as a Qualified Products List (QPL) screened unit.

Feature Summary

• Complies with MIL-DTL-M3933 military specifications
• Qualified Products List (QPL) screened construction
• Fixed 30 dB attenuation value
• SMA connector interface

Applications

• Military electronic systems
• Aerospace communication equipment
• Test and measurement instrumentation
• Harsh environment RF circuits

Procurement Notes

Verify that the specific order requires QPL screening status, as this designation indicates adherence to strict military quality control protocols. Confirm that the SMA connector gender matches the system requirements, as datasheets may list male/female variations. Ensure the 30 dB attenuation value aligns with the circuit design needs. Check for RoHS non-compliance if environmental regulations apply to the final assembly.

Selection Notes

Select this model when a high-attenuation fixed value is required in a compact form factor. The 30 dB rating distinguishes it from lower attenuation variants in the M3933/25 series. Consider the 12.4 GHz upper frequency limit against higher-frequency alternatives like the M3933/16 series if operation above this threshold is necessary. Verify thermal management capabilities given the 2 W power handling limit.

Part Context

This part belongs to the M3933/25 family of connectorized attenuators. Unlike the M3933/16 series which extends to 18 GHz, the M3933/25 series is optimized for frequencies up to 12.4 GHz. The suffix 'S' typically denotes SMA connectors, while 'N' denotes N-type connectors. This specific model represents a high-attenuation option within the standard military-grade lineup.

Replacement Considerations

M3933/25-52N serves as the functional equivalent with N-type connectors instead of SMA. Other M3933/25 variants offer different attenuation values but share similar electrical characteristics.