B78108T1393K000

TDK B78108T1393K000 is a through-hole fixed inductor with a nominal inductance of 39 µH and a tolerance of ±10%. It is rated for a maximum DC current of 140 mA and features a DC resistance of 4.5 Ohm maximum, making it suitable for low-current power and signal circuits. The component uses a ferrite drum core with wirewound construction and is unshielded, which should be considered when electromagnetic interference is a concern in the surrounding layout.

The inductor offers a Q factor of 60 at 2.52 MHz and a self-resonant frequency of 22 MHz. This indicates useful high-frequency behavior for resonant and filtering applications up to tens of megahertz. The device operates over a temperature range of -55°C to 125°C, covering standard industrial and automotive temperature environments.

Mechanically, the part is supplied in an axial package with dimensions of 0.130 inch diameter by 0.276 inch length (3.30 mm x 7.00 mm). Its through-hole design supports conventional PCB mounting and manual or wave soldering processes. The unshielded construction reduces weight and cost compared to shielded alternatives but may require layout precautions in sensitive circuits.