# Hangzhou Kefeng Electronics Co., LTD | emi filter core scrc70a,soft clip on ferrite core,nizn emi filter core, balun core transformer,rid balun core,rid balun ferrite core, MnZn pc40 ferrite core,RM7 Split Transformer Cores,MnZn rm ferrite core, ## summary > Manufacturer, Distributor/Wholesaler, Agent, Importer, Exporter, Trading Company, Seller, Brands: Careful, Careful Magnetism Co., Ltd. is a leading corporation with over 20 years of experience in Ferrite Core manufacturing. Our company has expanded to include 3 factories, serving a growing number of clients. With a team of over 1000 staff, including 120 management and technology professionals, we have established a technological center equipped with international-level automatic magnetic material examination equipment and the most advanced production line in the country., Established in 1987, Employees: >300, Annual sales: 25000000-30000000, Export ratio: 50% - 60%, Primary markets: North America, South America, Western Europe, Eastern Europe, Eastern Asia, Southeast Asia, Middle East, Africa, Oceania, Worldwide. ## Company Information * [Company Profile](https://www.emiferritecore.com/aboutus.html): Overview, history, teams and core capabilities. * [Factory & Manufacturing](https://www.emiferritecore.com/factory.html): Production capacity, OEM/ODM capabilities, and R&D strength. * [Quality Control](https://www.emiferritecore.com/quality.html): ISO certifications, quality standards, and compliance. * [Contact Us](https://www.emiferritecore.com/contactus.html): Global offices, inquiries, and support channels. ## Product Category * [EMI Suppression Core](https://www.emiferritecore.com/supplier-4704566-emi-suppression-core): Keywords: emi suppression ferrite,emi ferrite core,ferrite toroidal core. * [Split Core](https://www.emiferritecore.com/supplier-4704567-split-core): Keywords: split ferrite core,clip on ferrite ring,ferrite clamp on cores. * [Transformer Core](https://www.emiferritecore.com/supplier-4704568-transformer-core): Keywords: transformer ferrite core,ferrite toroidal core,ferrite ring core. * [Ferrite Core Inductor](https://www.emiferritecore.com/supplier-4704569-ferrite-core-inductor): Keywords: ferrocore inductors,custom inductors,choke coil inductor. * [Ferrite Drum Core](https://www.emiferritecore.com/supplier-4704570-ferrite-drum-core): Keywords: soft ferrite core,ni zn ferrite core,mn zn ferrite core. * [Ferrite Rod](https://www.emiferritecore.com/supplier-4704571-ferrite-rod): Keywords: ferrite bar,ferrite rod core,soft ferrite rod. * [Magnetic Powder Core](https://www.emiferritecore.com/supplier-4704572-magnetic-powder-core): Keywords: iron powder core,iron powder toroid core,magnetic iron core. * [Strong Permanent Magnet](https://www.emiferritecore.com/supplier-4704573-strong-permanent-magnet): Keywords: permanent magnets are magnets,neodymium block magnet,powerful permanent magnet. * [Nanocrystalline Core](https://www.emiferritecore.com/supplier-4704574-nanocrystalline-core): Keywords: amorphous transformer core,nanocrystalline toroidal core,nano crystalline core. * [Nizn Ferrite Core](https://www.emiferritecore.com/supplier-4756655-nizn-ferrite-core): Keywords: mnzn ferrite core,ferrite ring core,toroid ferrite core. ## Featured Products * [Wireless Charging Coils Nanocrystalline Core Toroidal Fe Based Amorphous Transformer Core](https://www.emiferritecore.com/sale-50911776-wireless-charging-coils-nanocrystalline-core-toroidal-fe-based-amorphous-transformer-core.html): Keywords: coils nanocrystalline core,nanocrystalline core toroidal,fe based amorphous transformer core. * [EMI Clamp Clip On USB Cable Ferrite Core Black Plastic 5mm Clip-On Ferrite Ring Core](https://www.emiferritecore.com/sale-50911817-emi-clamp-clip-on-usb-cable-ferrite-core-black-plastic-5mm-clip-on-ferrite-ring-core.html): Keywords: usb cable ferrite core black,clip on usb cable ferrite core,emi ferrite cable core. * [Size 6*25 EMI NiZn Impeder Soft Ferrite Bar Rod Core For Choke Coil](https://www.emiferritecore.com/videos-50911787-size-6-25-emi-nizn-impeder-soft-ferrite-bar-rod-core-for-choke-coil.html): Keywords: 6*25 ferrite bar,6*25 ferrite rod bar,nizn ferrite bar. * [Custom Size High Frequency Ferrite Power Inductor Coil 5 Mh Drum Core Inductor](https://www.emiferritecore.com/sale-50910659-custom-size-high-frequency-ferrite-power-inductor-coil-5-mh-drum-core-inductor.html): Keywords: 5 mh drum core inductor,power inductor coil 5 mh,nizn drum core inductor. * [Drum Ferrite Core Rohs ISO9001 10*12/25*30 Core 2pins With Free Sample](https://www.emiferritecore.com/sale-50910675-drum-ferrite-core-rohs-iso9001-10-12-25-30-core-2pins-with-free-sample.html): Keywords: drum ferrite core rohs,rohs ferrite drum core,iso9001 drum ferrite core. * [Rohs ISO9001 Magnetic Iron Core Iron Powder Toroidal Cores Use For Choke](https://www.emiferritecore.com/sale-50911534-rohs-iso9001-magnetic-iron-core-iron-powder-toroidal-cores-use-for-choke.html): Keywords: iso9001 magnetic iron core,rohs magnetic iron core,rohs iron powder toroidal cores. * [EMI Clip On USB Cable Ferrite Core 3.5/4/5/6/7/8/9mm Round Black Ferrite Clamp On Cores](https://www.emiferritecore.com/videos-50912219-emi-clip-on-usb-cable-ferrite-core-3-5-4-5-6-7-8-9mm-round-black-ferrite-clamp-on-cores.html): Keywords: black ferrite clamp on cores,clip on usb cable ferrite core,emi ferrite clamp on cores. * [NiZn Material EMI Filter core SCRC70A 90A 130B Cable Clamp Split Soft Clip On Ferrite Core](https://www.emiferritecore.com/videos-50911340-nizn-material-emi-filter-core-scrc70a-90a-130b-cable-clamp-split-soft-clip-on-ferrite-core.html): Keywords: emi filter core scrc70a,soft clip on ferrite core,nizn emi filter core. * [High Frequency Rid Soft Ferrite Balun Core Transformer Iron Rf Core NiZn / MnZn](https://www.emiferritecore.com/videos-50910504-high-frequency-rid-soft-ferrite-balun-core-transformer-iron-rf-core-nizn-mnzn.html): Keywords: balun core transformer,rid balun core,rid balun ferrite core. * [MnZn PC40 / PC44 / PC47 Ferrite RM7 Split Transformer Cores Soft rm ferrite core](https://www.emiferritecore.com/sale-50910480-mnzn-pc40-pc44-pc47-ferrite-rm7-split-transformer-cores-soft-rm-ferrite-core.html): Keywords: MnZn pc40 ferrite core,RM7 Split Transformer Cores,MnZn rm ferrite core. ## Case Studies & Applications * [New Catalog of Careful.pdf](https://www.emiferritecore.com/cases/new-catalog-of-careful-pdf-30281.html) * [ISO9001：2015.pdf](https://www.emiferritecore.com/cases/iso9001-2015-pdf-30278.html) * [ISO14001.pdf](https://www.emiferritecore.com/cases/iso14001-pdf-30276.html) * [SCEM—careful company.pdf](https://www.emiferritecore.com/cases/scem-careful-company-pdf-30275.html) * [REACH Report.pdf](https://www.emiferritecore.com/cases/reach-report-pdf-30273.html) * [ROHS Report.pdf](https://www.emiferritecore.com/cases/rohs-report-pdf-30272.html) ## Search Search endpoint: https://www.emiferritecore.com/buy-{keyword}.html Rules: - Convert keywords to lowercase - Replace spaces with "-" - Remove special characters Users can combine keywords for more precise searches. ## News & Blog * [All About Core Wire](https://www.emiferritecore.com/news/all-about-core-wire-216370.html) * [Ettd39 Ferrite Core](https://www.emiferritecore.com/news/ettd39-ferrite-core-216372.html) * [How to Power Up Your Iron Core Inductor](https://www.emiferritecore.com/news/how-to-power-up-your-iron-core-inductor-216373.html) * [How to Build a Better Ee30 Ferrite Core Circuit Board](https://www.emiferritecore.com/news/how-to-build-a-better-ee30-ferrite-core-circuit-board-216377.html) * [Finishing Up With a Nice, High Quality Chip Ferrite Bead](https://www.emiferritecore.com/news/finishing-up-with-a-nice-high-quality-chip-ferrite-bead-216379.html) * [Laird Technologies Boosts EMI Suppression with Advanced Ferrite Cores](https://www.emiferritecore.com/blog/laird-technologies-boosts-emi-suppression-with-advanced-ferrite-cores-384751.html) * [Split Core Ferrites Boost Electronic Connectivity and Signal Integrity](https://www.emiferritecore.com/blog/split-core-ferrites-boost-electronic-connectivity-and-signal-integrity-384247.html) * [Ferrite Cores Boost Circuit Performance Via Impedance Matching](https://www.emiferritecore.com/blog/ferrite-cores-boost-circuit-performance-via-impedance-matching-382462.html) * [Ferrite Cores Key to Effective EMC Testing and EMI Reduction](https://www.emiferritecore.com/blog/ferrite-cores-key-to-effective-emc-testing-and-emi-reduction-381857.html) * [Q50A Clamp Enhances Electrical Monitoring with Precision](https://www.emiferritecore.com/blog/q50a-clamp-enhances-electrical-monitoring-with-precision-381367.html)