CTMC1812SF-681K

Fixed Inductors Overview

The CTMC1812SF-681K is a fixed inductor manufactured by Central Technologies, designed for surface-mount applications. It features an unshielded drum core construction with wirewound technology. The component provides a nominal inductance of 680 µH with a tolerance of ±10%. Key electrical specifications include a maximum DC resistance of 30 Ohms and a rated current of 50 mA. The device operates within a temperature range defined by standard industrial classifications and utilizes the 1812 (4532 Metric) package footprint.

Fixed Inductors Feature Summary

• Unshielded drum core design for general-purpose filtering
• Wirewound construction ensuring stable inductance characteristics
• Surface-mount compatibility with standardized 1812 dimensions

Fixed Inductors Applications

• General purpose signal processing circuits
• Power supply input/output filtering
• RF circuit impedance matching

Fixed Inductors Procurement Notes

Verify the specific suffix K indicates the required ±10% tolerance against project specifications. Confirm that the 50 mA current rating aligns with peak operational loads to prevent saturation. Ensure the unshielded nature does not interfere with nearby sensitive components due to potential magnetic field emission. Cross-reference the 30 Ohm DCR limit with voltage drop requirements in the target circuit topology.

Fixed Inductors Selection Notes

Select this component when a high-inductance value is required in a compact surface-mount form factor. The unshielded design may necessitate careful layout planning to minimize electromagnetic interference with adjacent traces. Consider the low current rating of 50 mA; it is suitable for low-power signal paths rather than high-current power delivery stages. Evaluate the self-resonant frequency implications if used in high-frequency switching environments.

Fixed Inductors Part Context

This part belongs to the CTMC1812SF series of fixed inductors from Central Technologies. The series offers various inductance values within the 1812 package, catering to diverse filtering needs. The SF designation typically denotes specific performance or packaging variations within the manufacturer's lineup, distinguishing it from shielded or axial-leaded alternatives like the CTC5F series.

Fixed Inductors Replacement Considerations

Direct substitutes must match the 680 µH inductance, 1812 package size, and ≤30 Ohm DCR. Verify that alternative vendors offer comparable 50 mA current ratings. Unshielded drum core variants are preferred to maintain similar magnetic field profiles.