FAQ Capacitors (-) Inductors (Coils) EMC Components RF Components Voltage / Current / Temperature Protection Devices Sensors and Sensor Systems Ceramic Switching / Heating, Piezo Components, Contactors, Buzzers and Microphones Ferrites and Accessories Power Supplies Magnets Facet FAQ Search List - Product Categories L1 Facet FAQ Search List - Product Categories L2 Product Categories 製品カテゴリ Produktkategorien 产品类别 Facet FAQ Search List - Product Categories L3 Product Categories 製品カテゴリ Produktkategorien 产品类别 (-) Products Measurement Electrical Characteristics Environmental Compatibility Product Quality and Service Life Structure, material Technical support tools Others Facet FAQ Search List - FAQ Category 1 Product Categories L1 Product CategoriesCapacitorsInductors (Coils)EMC ComponentsRF ComponentsVoltage / Current / Temperature Protection DevicesSensors and Sensor SystemsCeramic Switching / Heating, Piezo Components, Contactors, Buzzers and MicrophonesTransformersFerrites and AccessoriesPower SuppliesMagnets Product Categories L2 Product Categories Product Categories L3 Product Categories FAQ Category CategoriesProductsMeasurementElectrical CharacteristicsEnvironmental CompatibilityOperation manualOperational descriptions by objectiveProduct Quality and Service LifeReliabilityStructure, materialTechnical support toolsTroubleshootingOthersAbout myTDK Products Q. Is an explanation of the basics of an inductor (a coil) available? Q. Please explain how an inductor (a coil) functions. Q. Why is inductance specified by numbers such as 1, 1.5, 2.2, 3.3, etc.? Q. Would it be safe to use an inductor in which a current exceeding the rated current flows momentarily? Q. Would it be a problem to use inductors in parallel? Q. I would like to use high frequency inductors for impedance matching. Which products do you recommend? Q. I do not understand how the direction identification markings on the MLG/MHQ series inductors correspond to each other. Q. Which inductor is recommended for smoothing a power circuit? Q. Why are the characters such as "4R7" or "100" printed on some products? Q. What is the Q value of an inductor (a coil)? Q. What is SRF (self-resonant frequency)? Q. Please explain the types of TDK's inductors (coils) and their differences. Q. Please provide a basic explanation of the process for choosing an inductor. Q. There are direction identification markings on some products. What are those markings for?