ECS-45K20B

Overview

The ECS-45K20B is a monolithic crystal filter manufactured by ECS Inc. International, designed for through-hole mounting in the UM-1 package. It operates at a center frequency of 45 MHz with a 3 dB bandwidth of 10 kHz and features four poles. The component supports a load capacitance of 2.5 pF and functions within an operating temperature range of -20°C to 70°C.

Feature Summary

• Monolithic construction providing stable filtering characteristics
• Four-pole design for enhanced selectivity
• Through-hole mounting capability for robust integration

Applications

• Power supply circuits
• Battery chargers
• Portable electronic devices

Procurement Notes

Verify the specific datasheet version from ECS Inc. International to confirm exact electrical tolerances and mechanical dimensions. Ensure compatibility with existing PCB footprints for the UM-1 package. Cross-reference specifications with system requirements for frequency stability and temperature performance before finalizing procurement decisions.

Selection Notes

Select this component when a 45 MHz bandpass filter is required for signal conditioning in power management or portable applications. Consider the UM-1 package size and through-hole mounting constraints during layout. Verify that the 10 kHz bandwidth meets the system's noise rejection needs.

Part Context

This part belongs to the ECS monolithic crystal filter series, which integrates multiple resonators into a single ceramic body. These filters are commonly used in intermediate frequency (IF) stages and clock generation circuits where compact size and reliable performance are critical.

Replacement Considerations

Consult official ECS documentation for direct substitutes. Generic equivalents may differ in bandwidth or pole count.