B111NC4S

Overview

The B111NC4S is a surface-mount bandpass filter manufactured by Knowles Dielectric Labs. It operates at a center frequency of 11.425 GHz with a bandwidth of 2.55 GHz. The component features a 50 Ohm impedance and an insertion loss of 2.25 dB. Designed for board mounting, it supports SMD/SMT termination styles. The device functions within a temperature range of -55°C to +125°C.

Feature Summary

• Surface-mount construction for automated assembly integration
• Bandpass filtering capability centered at 11.425 GHz
• Operational stability across extended industrial temperature ranges

Applications

• Microwave communication systems
• Radio frequency signal conditioning
• Test and measurement instrumentation

Procurement Notes

Verify the specific datasheet version for the B111NC4S to confirm current manufacturing status and RoHS compliance details. Ensure that the ordering suffix matches the required packaging format, as variations may exist between bulk and reel options. Cross-reference the part number with official distributor catalogs to validate availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when a fixed center frequency of 11.425 GHz is required. The 2.55 GHz bandwidth defines the passband width. Verify that the 50 Ohm system impedance aligns with the circuit design. Confirm that the SMD package dimensions fit the PCB layout constraints and that the thermal operating range meets the environmental requirements.

Part Context

This component belongs to the Knowles Dielectric Labs bandpass filter series. These filters are engineered for high-frequency RF applications requiring precise frequency selection. The product line typically utilizes advanced dielectric materials to achieve low insertion loss and stable performance in compact surface-mount packages suitable for modern electronics manufacturing.

Replacement Considerations

Check for direct substitutes from the same manufacturer series. Verify that any alternative part maintains the 11.425 GHz center frequency and 2.55 GHz bandwidth. Ensure impedance and package compatibility before substitution.