M3933/25-61S

Overview

The M3933/25-61S is a fixed RF attenuator manufactured by Cinch Connectivity Solutions under the Midwest Microwave brand. It provides a nominal attenuation of 1.5 dB with a maximum power rating of 2 W. The component operates within a frequency range of 0 Hz to 18 GHz and utilizes SMA connectors in an in-line module configuration. Designed for military applications, it complies with MIL-DTL-M3933 standards and features screened QPL construction.

Feature Summary

• Complies with MIL-DTL-M3933 military specifications for qualified products list (QPL) components
• Screened construction ensures high reliability for defense and aerospace environments
• SMA connector interface supports in-line module integration into RF signal chains

Applications

• Military radar systems requiring precise signal level control
• Aerospace communication equipment operating at microwave frequencies
• Defense test and measurement instrumentation setups

Procurement Notes

Verify that the specific order requires MIL-DTL-M3933 compliance and QPL screening status. Confirm SMA connector gender compatibility for the intended circuit design. Ensure the 2 W power rating and 18 GHz frequency range meet system requirements. Check for RoHS non-compliance as these are typically lead-based military components.

Selection Notes

Select this model when a low attenuation value of 1.5 dB is required up to 18 GHz. The SMA interface suits standard coaxial interconnects. Consider the 2 W power handling for high-power RF paths. Verify environmental specifications against harsh operation needs.

Part Context

This part belongs to the M3933/25 series of connectorized attenuators from Midwest Microwave. The series offers various attenuation values within the same form factor. These components are designed for high-reliability applications where strict military standards apply.

Replacement Considerations

Direct replacements must match the 1.5 dB attenuation, SMA interface, and MIL-DTL-M3933 specification. Other M3933/25 variants offer different attenuation levels but share similar mechanical and electrical characteristics.