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Three-Phase Common Mode Power Line Choke solutions from Nanjing Infinity Technology (INF) suppress conducted common-mode noise on three-phase AC inputs. They help equipment meet EMC targets while maintaining stable, efficient operation. Typical uses include VFD drives, industrial automation, PV inverters, EV charging, UPS, medical power, telecom systems, and three-phase EMI filter assemblies.
INF is a custom magnetic component expert and China-based manufacturer focused on high-performance EMI suppression. We tailor inductance, impedance, core material, insulation, and mechanical footprint to your platform. Our quality system follows ISO9001, and products are designed to meet UL, CE, and RoHS requirements. You receive application guidance, rapid prototypes, and free samples to validate performance quickly.
Families include SQ, ET, and UU series power line chokes, plus toroidal designs for three-phase lines. Options cover MnZn ferrite and nanocrystalline cores with PCB, chassis, or cased/potted formats for robust integration in harsh environments.
| Attribute | MnZn Ferrite | Nanocrystalline |
|---|---|---|
| Suppression band | Lower to mid frequencies | Wideband including higher frequencies |
| Size for target impedance | Typically larger | More compact |
| Thermal behavior | Good | Very good at higher flux |
| Typical use | General industrial and telecom | VFD, PV inverters, UPS, EV charging |
PCB mount saves wiring in compact systems. Chassis mount supports higher current and heat sinking. Cased/potted options add mechanical protection and environmental resistance.
Start with your emissions profile, line ratings, and allowable temperature rise. Choose core material and impedance to target dominant common-mode frequencies without excessive losses or saturation. Align creepage/clearance and mounting with your insulation strategy.
These chokes reduce bearing currents and radiated noise in drives and servos. PV and storage converters benefit from wideband attenuation in compact footprints. EV charger inputs and UPS front ends gain stable suppression under variable load. Automation, medical, and telecom power shelves achieve compliance without sacrificing efficiency.
INF designs align with ISO9001 quality management and products are designed to meet UL, CE, and RoHS. On request, designs can reference requirements in EN 60938-2. Materials for housings and bobbins can be specified to meet UL 94 V-0. We advise on creepage, clearance, hipot, grounding, and filter layout.
INF provides ODM/OEM services to tune inductance, impedance, winding schemes, and insulation systems. We match dimensions and mounting to your enclosure and wiring plan, and support star or delta line configurations. Prototypes and free samples accelerate validation.
As a manufacturer, Nanjing Infinity Technology (INF) is ready to support your next design with reliable quality and responsive engineering. Share specifications or EMI data to receive a tailored proposal, samples for evaluation, and guidance on complete filter integration.
