Magnetics

Magnetic components are essential for power conversion, signal conditioning, and EMI suppression in modern electronics. This category includes filters for noise control, inductors for energy storage, and transformers for voltage isolation and conversion.

Online Components offers over 41,000 magnetic components from more than 100 authorized suppliers, including Bourns, Pulse, Triad Magnetics, and TE Connectivity. With U.S.-based inventory, competitive pricing, and fast global shipping, you can source the magnetics you need with confidence.

How to Choose the Right Magnetic Component

Component Type

Filters reduce electromagnetic interference (EMI) and maintain signal integrity, inductors store and manage energy in power supplies, and transformers provide isolation and voltage conversion.

Electrical Ratings

Check current capacity, inductance, resistance, and voltage handling. Select with a margin to ensure stability under load and long-term reliability.

Form Factor & Mounting

Select between surface-mount (SMD) and through-hole packages according to your assembly requirements. For higher power, consider chassis- or panel-mount transformer designs.

Popular Applications for Magnetic Components

• Power Supplies & Converters: Inductors and transformers in AC-DC and DC-DC conversion.
• Signal Integrity & EMI Control: Filters for reducing conducted and radiated noise in sensitive circuits.
• Networking & Telecom: Transformers and common-mode chokes in routers, switches, and telecom equipment.
• Industrial & Automation Systems: Magnetics in motor drives, control panels, and factory power infrastructure.
• Consumer & Automotive Electronics: Inductors and transformers in chargers, infotainment systems, and onboard power distribution.

Why Buy Magnetic Components from Online Components?

• Authorized Distributor Since 1999: Genuine supply, traceable back to leading manufacturers.
• Extensive Selection: 41,000+ part numbers covering filters, inductors, and transformers.
• Fast Fulfillment: Same-day U.S. shipping with predictable global flat-rate delivery.
• Competitive Pricing: Transparent screen pricing and low MOQs for both prototypes and production.
• Easy Sourcing: Search by electrical rating, package, or supplier to find exactly what you need.

Magnetic Components: What You Should Know

What’s the difference between filters, inductors, and transformers?

Filters suppress EMI and unwanted noise, inductors store energy and smooth current flow, and transformers transfer energy between circuits while providing voltage step-up/step-down and electrical isolation.

How do I size inductors for a power supply design?

Match inductance and current rating to your converter topology. Always select with headroom to prevent saturation under peak loads.

Why use common-mode chokes in networking and telecom equipment?

They suppress conducted EMI across data lines, improving signal integrity and compliance with regulatory standards.

What packaging options are available for magnetics?

Surface-mount for compact, automated assembly; through-hole for durability; and chassis/panel-mount transformers for high-power applications.