These chokes are based on alloy powder toroidal cores of Sendust material. They have slightly larger inductance dependence on DC magnetization when compared to the iron powder cores. However their frequency range is superior, so they can be used as working chokes of switching power supply up to at least 100 kHz.

Standard chokes of series PMEC 300 are designed as the storage chokes for high-efficiency SMPS.

Chokes are fitted with two windings, which are usually connected on PCB in parallel. However the option of serial connection brings the advantage of choosing the resulting inductance in uncommon fine steps.

• Climatic category: 40/125/21
• Nominal voltage: 250V, 50Hz
• Inductance tolerance (@10kHz, 50mV, 25'C): +/-20%

1) Approximate diameter of core without winding.

PMEC is a leading manufacturer of inductive components from Chech Republic.
The company offers components based on ferrite, nanocrystalline, sendust, permalloy and iron powder cores of various types, manufactured to top european quality standards.
PMEC holds a market position as one of the biggest, flexiblest and most reliable suppliers in the Czech Republic.Product range includes single and multiple winding chokes, current transfomers and current sensors in open or sealed cases, both for vertical and horizontal assembly, fully compatible and interchangeable with products of top european manufacturers.
PMEC offers also winding of the cores and assembly into the cases and carriers supplied by the customer.
PMEC uses most efficient windowg machines, automatic potting and robotic measurement and marking system.