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A Leaded Toroidal Line Choke provides differential‑mode EMI attenuation in AC/DC and DC/DC stages. The toroidal core concentrates flux for low leakage, compact size, and reduced stray fields. Through‑hole, radial leads offer robust mounting and vibration resistance. With a wide inductance range and strong current capability, these chokes help you meet EMC targets without sacrificing efficiency.
We are a China‑based manufacturer with integrated R&D and OEM/ODM capabilities. Our engineers tailor inductance, current rating, core material, wire, insulation, and footprint to your specification. Production follows ISO9001, with support for UL, CE, and RoHS where applicable. Free samples and rapid prototypes accelerate validation and time to compliance.
Select iron powder for stable inductance under DC bias and low loss at moderate switching frequencies. Choose ferrite for high permeability and compact designs, while managing saturation and temperature behavior. Finishes include tape wrap, epoxy coat, sleeving, or encapsulation to meet creepage, clearance, and environmental needs.
| Variant | Key Strengths | Considerations |
|---|---|---|
| Iron powder | Stable vs DC bias; predictable attenuation | Often larger than ferrite at the same L |
| Ferrite | Compact inductance; effective into low MHz | Check saturation and thermal behavior |
Use these inductors as the L element in L‑C or π filters to reduce symmetric noise. Typical deployments include SMPS input/output filters, telecom power, computing, instrumentation, and LED drivers. Through‑hole construction supports industrial automation, inverters, and automotive conditions with vibration.
Define inductance at operating current and set tolerance for target attenuation. Specify rated and peak current, allowable temperature rise, and DCR budget. Confirm mechanical limits, lead spacing, insulation class, and operating temperature range.
| Factor | What to Define | Impact |
|---|---|---|
| Inductance | L at operating current, tolerance | Sets attenuation at switching and harmonics |
| Current | Continuous and peak/inrush | Prevents saturation and thermal issues |
| DCR | Resistance target | Balances copper loss and size |
| Core | Iron powder or ferrite | Influences size and loss |
| Mechanical | OD/height, lead pitch, insulation | Ensures PCB fit and safety distances |
Configurable inductance spans from low microhenries to tens of millihenries. Current ratings cover sub‑amp to double‑digit amp classes, with optimized DCR via wire gauge and turns. Mechanical dimensions and lead options are tailored to your layout and thermal constraints.
Our team designs to spec and provides prototypes with free samples for quick evaluation. We offer DFM guidance to balance attenuation, loss, and cost, then transition from pilot to mass production with controlled processes. Contact our manufacturer engineering team for a customized Leaded Toroidal Line Choke, samples, and a fast quotation.
