LCAT7438-4

Overview

The LCAT7438-4 is a fixed RF attenuator manufactured by L-com, designed for coaxial signal applications. It provides a typical attenuation of 4 dB with a maximum power handling capacity of 2 Watts continuous wave. The device operates within a frequency range of DC to 4 GHz and maintains a characteristic impedance of 75 Ohms. It features a BNC in-line module package configuration, incorporating a male connector on one end and a female connector on the other. The unit exhibits a Voltage Standing Wave Ratio (VSWR) of less than 1.35:1 and complies with RoHS3 standards.

Feature Summary

• Coaxial in-line design with integrated BNC male and female connectors
• Fixed 4 dB attenuation value for precise signal reduction
• Operates across a broad frequency spectrum from DC to 4 GHz
• Supports up to 2 Watts of continuous wave power

Applications

• RF signal level adjustment in broadcast infrastructure
• Impedance matching in 75 Ohm video transmission systems
• Signal conditioning in telecommunications test equipment
• Attenuation requirements in CATV distribution networks

Procurement Notes

Verify that the specific order matches the 75 Ohm impedance specification, as 50 Ohm variants exist within similar product lines. Confirm the BNC connector gender orientation aligns with the required circuit topology. Ensure environmental conditions do not exceed the 2 Watt power rating to prevent thermal damage. Check for RoHS3 compliance documentation if regulatory adherence is mandatory for the deployment region.

Selection Notes

Select this component when a precise 4 dB reduction is required in a 75 Ohm system operating below 4 GHz. The BNC interface suits standard coaxial cabling setups without requiring adapters. Consider the 2 Watt power limit when designing circuits with high signal levels. This model is appropriate for applications prioritizing low VSWR and stable attenuation performance over wide bandwidths.

Part Context

This part belongs to L-com's LCAT7438 series of fixed attenuators, which offers various attenuation values including 3 dB and 10 dB options. The series maintains consistent physical dimensions and connector types while varying internal resistance networks to achieve different decibel losses. All models share the same 75 Ohm impedance and BNC interface specifications for interchangeability in compatible systems.

Replacement Considerations

Compatible substitutes include the LCAT7438-3 for 3 dB attenuation or the LCAT7438-10 for 10 dB attenuation, provided the impedance and connector type remain unchanged. Verify that any replacement maintains the 75 Ohm characteristic impedance and BNC interface to ensure seamless integration without modifying existing cable assemblies.