M3933/25-39S

Overview

The M3933/25-39S 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 13 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 military applications, it complies with MIL-DTL-M3933 standards. The unit utilizes a coaxial construction with a 50 Ohm impedance.

Feature Summary

• Complies with MIL-DTL-M3933 specifications for Qualified Product List (QPL) reliability
• Provides fixed 13 dB attenuation in an inline module configuration
• Operates reliably across a wide temperature range from -55°C to +125°C

Applications

• Military communication systems requiring certified RF components
• Test and measurement equipment operating up to 12.4 GHz
• Aerospace signal processing circuits

Procurement Notes

Verify that the specific part number matches the required QPL status and MIL-DTL-M3933 compliance. Confirm connector gender and mating compatibility with existing SMA interfaces. Ensure thermal management aligns with the 2 W power rating and specified operating temperature limits. Check for RoHS exemption requirements as these are typically non-compliant.

Selection Notes

Select this model when a precise 13 dB attenuation is required within the 12.4 GHz bandwidth. Consider the SMA interface for standard connectivity needs. Evaluate the 2 W power handling against system signal levels. Verify environmental ratings meet the -55°C to +125°C operational constraints for harsh environments.

Part Context

This component belongs to the M3933/25 series of connectorized attenuators. It shares the same form factor and electrical architecture as other variants in the family, differing primarily in attenuation value and frequency extension. The series is characterized by rugged construction suitable for defense and aerospace sectors.

Replacement Considerations

M3933/25-39N serves as a direct functional substitute with identical electrical parameters and MIL-DTL-M3933 compliance. Both parts offer 13 dB attenuation and 12.4 GHz operation. Verify connector gender consistency between S and N suffixes before substitution.