M3933/25-78N

Overview

The M3933/25-78N is a fixed RF attenuator manufactured by Amphenol SV Microwave. It features SMA male to female connectors and operates within a frequency range of DC to 18 GHz. The component provides a maximum attenuation of 10 dB at a characteristic impedance of 50 Ohms. It supports a power rating of 2 W and functions reliably across an operating temperature range from -65 °C to +165 °C.

Feature Summary

• Provides precise signal attenuation in high-frequency microwave applications
• Constructed with durable SMA connector interface for reliable interconnection
• Designed for operation in extreme thermal environments up to 165 °C

Applications

• Military radio systems requiring signal level control
• Test and measurement instrumentation setups
• Microwave communication equipment integration

Procurement Notes

Verify the specific suffix 'N' indicates non-screened construction when sourcing replacements, as screened variants exist within the same series. Confirm that the 10 dB attenuation value matches the system requirement exactly. Ensure the SMA gender configuration aligns with existing cabling infrastructure before finalizing procurement orders.

Selection Notes

Select this model when a fixed 10 dB reduction is required within the 18 GHz bandwidth. The 50 Ohm impedance ensures compatibility with standard RF transmission lines. Consider the 2 W power handling capability against peak signal levels. The wide temperature range makes it suitable for harsh outdoor or aerospace deployments where thermal stability is critical.

Part Context

This component belongs to the M3933 family of military specification attenuators. These units are designed to meet rigorous environmental standards for defense and aerospace use. The SMA interface allows for easy integration into existing coaxial systems without requiring adapter hardware.

Replacement Considerations

M3933/25-78S serves as a screened alternative within the same series. Verify if shielding requirements dictate the choice between screened and non-screened versions.