CTMC1812SF-390J

Fixed Inductors Overview

The CTMC1812SF-390J is a general purpose wire-wound chip inductor manufactured by Central Technologies. It features an unshielded drum core design with a nominal inductance of 39 µH and a tolerance of ±5%. The component utilizes a ferrite core and is packaged in a surface-mount 1812 (4532 metric) footprint. Key electrical specifications include a maximum DC resistance of 4.5 Ohms and a rated current of 150 mA.

Fixed Inductors Feature Summary

• Unshielded drum core construction for general purpose applications
• Surface-mount 1812 package format
• Ferrite core material

Fixed Inductors Applications

• General purpose filtering
• Tuning circuits
• RF applications

Fixed Inductors Procurement Notes

Verify the specific suffix 'SF' against the manufacturer's latest documentation to confirm lead-free status and RoHS compliance, as standard variants may differ. Ensure the ordering code matches the required tolerance and inductance value precisely. Confirm that the 150 mA current rating meets the circuit requirements before finalizing procurement.

Fixed Inductors Selection Notes

Select this component when a 39 µH inductance is required in a compact 1812 surface-mount form factor. Consider the 4.5 Ohm DC resistance limit for voltage drop calculations. The unshielded design requires adequate spacing from sensitive components to prevent magnetic interference. Verify thermal performance at the intended operating current.

Fixed Inductors Part Context

This part belongs to the CTMC1812SF series of wire-wound chip inductors from Central Technologies. The series offers various inductance values within the 1812 package size. The 'SF' designation typically indicates specific manufacturing attributes such as lead-free composition or enhanced reliability standards compared to standard molded variants.

Fixed Inductors Replacement Considerations

Direct substitutes must match the 39 µH inductance, 1812 package dimensions, and similar current ratings. Cross-reference with other manufacturers offering unshielded drum core inductors in the same footprint. Verify that alternative parts meet the same DC resistance and tolerance specifications.