CTTF0402F-4N7B

Overview

The CTTF0402F-4N7B is a fixed thin film chip inductor manufactured by Central Technologies, designed for surface-mount applications. It features an inductance of 4.7 nH with a tolerance code 'B' indicating ±0.1 nH precision. The component operates within a temperature range of -40 °C to +85 °C and supports a maximum rated current of 320 mA. Its DC resistance is specified at a maximum of 600 mΩ, while the self-resonant frequency reaches 6000 MHz. This unshielded device utilizes a 0402 package footprint and complies with RoHS standards.

Feature Summary

• Thin film construction for high-frequency stability
• Ultra-low inductance tolerance for precision circuits
• Unshielded design suitable for compact layouts

Applications

• Cellular telephone RF circuits
• GPS product matching networks
• Pagers and communication devices

Procurement Notes

Verify the specific tolerance suffix 'B' corresponds to ±0.1 nH accuracy during ordering. Confirm that the 0402 package dimensions align with the target PCB land pattern. Ensure the 320 mA current rating meets the circuit's peak requirements. Check for RoHS compliance documentation if required by assembly standards.

Selection Notes

Select this component when sub-nanohenry precision is critical for impedance matching. The thin film technology offers superior stability compared to standard wound inductors. Consider the 600 mΩ DC resistance impact on insertion loss. Evaluate the unshielded nature regarding potential electromagnetic interference in dense layouts.

Part Context

This part belongs to the CTTF0402F series from Central Technologies, which covers inductances from 0.2 nH to 33 nH. The series provides various tolerance options including B, C, S, F, G, H, and J codes. It serves as a specialized solution for RF front-end applications requiring minimal parasitic effects and tight manufacturing tolerances.

Replacement Considerations

Direct substitutes include other CTTF0402F variants with identical 4.7 nH values but different tolerances such as CTTF0402F-4N7C or CTTF0402F-4N7S. Cross-manufacturer equivalents must match the 0402 footprint, 4.7 nH nominal value, and similar self-resonant frequency characteristics.