Industrial-Grade Inductors & Common Mode Chokes
A comprehensive catalog of standard off-the-shelf inductors and fully custom engineered magnetic components rank among the core engineering capabilities of Triad Magnetics. As essential passive two-terminal components, inductors store electrical energy within a concentrated magnetic field when electric current flows through their turns. Serving as indispensable workhorses in power conversion, RF communication, and industrial automation systems, inductors maintain signal integrity, manage voltage ripple, and isolate system noise.
With over 75 years of manufacturing heritage, ISO 9001:2015 certified production centers in the United States and the Philippines, and thousands of standard catalog part numbers, Triad Magnetics provides global original equipment manufacturers (OEMs) with precision performance, thermal stability, and reliable power conditioning.
Engineering Compliance & Quality Assurance
All Triad inductors and chokes are constructed using UL-recognized 130°C Class B (or higher) insulation materials, conforming strictly to RoHS, REACH, and international electrical safety standards. Custom designs undergo 100% automated electrical testing and parameter verification prior to global shipment.
Inductor Classifications & Technical Specifications
Depending on core materials, mounting configurations, and operational frequencies, inductors perform distinct functional roles across electronic circuitry. Primary inductor classifications engineered by Triad Magnetics include:
- Coupled Inductors: Engineered with multiple windings around a shared magnetic core. Their high magnetic coupling factor allows efficient step-up or step-down voltage transformation and ripple-current cancellation in switch-mode DC-DC converters.
- Multilayer & Surface Mount (SMD) Inductors: Miniature multi-layer ceramic or ferrite structures optimized for compact high-density circuit board layouts where board real estate is critical.
- Molded Power Inductors: Encapsulated within rugged ceramic, thermoset plastic, or magnetic powder housings to provide environmental resilience, mechanical strength, and superior thermal conductivity.
- High-Power Inductors: Designed to carry high DC saturation currents without core degradation. These units feature integral magnetic shielding to mitigate stray electromagnetic interference (EMI).
- Radio Frequency (RF) Inductors: Specialized high-Q inductors designed for minimal AC resistance, low parasitic capacitance, and stable performance at high operational frequencies.
- Surface Mount Shielded Power Inductors: Ultra-low profile, self-shielded inductors ideal for mobile devices, embedded computing, and micro-power conversion systems.
Choke Technology: Common Mode vs. Differential Mode Filtering
Chokes represent a specialized class of inductors designed specifically to filter high-frequency AC signals while permitting low-frequency or direct current (DC) to pass with minimal impedance. By introducing high reactance to undesired high-frequency pulses, chokes effectively eliminate voltage spikes, line noise, and electromagnetic ripple in power delivery circuits.
Engineers categorize filtering chokes into two primary structural types:
1. Power & Audio Frequency Chokes
Constructed with laminated silicon steel or heavy iron cores to maximize inductance at line frequencies (50Hz to 400Hz). These heavy-duty components smooth out current fluctuations in high-power industrial equipment, audio amplifiers, and linear power supply outputs.
2. RF & High-Frequency Common Mode Chokes
Built using advanced ferrite toroidal cores or powdered iron compositions with segmented, balanced winding patterns. High-frequency chokes deliver exceptional common mode noise attenuation across multi-megahertz bands without saturating under heavy operating load currents.
Triad Standard Product Series Matrix
Triad Magnetics manufactures over 260 distinct standard inductor and choke series engineered for rapid deployment. The table below outlines key series characteristics for OEM design selection:
| Series | Inductor / Choke Type | Core Material & Style | Target Applications |
|---|---|---|---|
| CMF Series | Dual-Function Common Mode | Compact Vertical / Horizontal Ferrite | LED Drivers, Electronic Ballasts, SMPS Line Filters |
| CMT8100 Series | High-Current Common Mode | Precision-Wound Toroidal Ferrite | AC Line EMI Suppression, Industrial Power Supplies |
| CMT908 / CME Series | Differential Mode Filter | UL 130°C Rated Closed-Loop Ferrite | Input AC Filtering, Noise Isolation, Power Conditioning |
| UT / ET Series | EMI / RFI Suppression Choke | Low-Leakage Section Winding Core | Precision Instrumentation, Commercial Electronics |
| Toroidal Differential Mode | Switch-Mode High Frequency | Powdered Iron / Ferrite Toroids | DC-DC Converters, Output Smoothing, Inverters |
| Rod Core Series | High-Frequency Power Choke | Low-Cost Iron Rod Core | Automated PCB Assembly, Motor Drives, Power Supplies |
| AX97 / AX104R Series | Shielded SMD Power Inductor | Low-DCR Slim Ferrite Construction | High-Density DC-DC Regulators, Embedded Systems |
| AX1005 / AX02 Series | Heavy-Duty SMD Power Inductor | Self-Shielded Low Noise Body (Max 6.5mm) | Telecom Infrastructure, High-Current Power Modules |
| Smoothing Filter Series | DC Power Supply Filter Choke | Air-Gapped Laminated Steel Core | Linear Power Supplies, Variable Frequency Drives (VFD) |
Detailed Product Line Breakdown
CMF Series Dual-Function Common Mode Inductors
The CMF Series combines common-mode noise rejection and stray differential-mode inductance into a single ultra-compact footprint. Available in vertical or horizontal PC board mounting styles, CMF inductors eliminate the need for separate differential chokes, saving critical PCB area in switch-mode power supplies and solid-state LED luminaires.
CMT8100 & CMT908 Series Heavy-Duty Line Filters
Built with precision automatic winding machines, the CMT8100 and CMT908 lines reduce stray capacitance and maximize self-resonant frequency. Their high dielectric isolation strength prevents line-to-line breakdown, fulfilling strict safety requirements in heavy industrial machinery, UPS back-up systems, and renewable energy inverters.
AX-Series Surface Mount (SMD) Shielded Power Inductors
Featuring maximum profiles ranging from 4.0mm to 6.5mm, the AX97, AX104R, AX1005, and AX02 product lines deliver low direct current resistance (DCR) alongside massive DC current handling. Integral magnetic shielding retains flux within the component body, eliminating cross-talk interference with adjacent high-speed signal lines.
Smoothing Filter Chokes with Gapped Cores
Designed for demanding power distribution networks, Triad smoothing chokes incorporate precise air gaps within their laminated iron cores. This structural gap prevents magnetic core saturation under maximum continuous DC load currents, providing smooth, linear inductance characteristics across varying operating temperatures.
Custom Inductor & Choke Design Capabilities
When off-the-shelf catalog parts do not satisfy unique mechanical dimensions, thermal limits, or electrical parameters, Triad's U.S. Design Center engineers bespoke magnetic solutions. Our custom manufacturing capabilities include:
- Custom Winding Configurations: Foil winding, Litz wire for high-frequency skin effect reduction, bifilar/filar windings for tight magnetic coupling, and heavy wire gauges for high-ampere applications.
- Specialized Core Materials: High-permeability ferrites, amorphous metals, nanocrystalline cores, powdered iron, and silicon steel laminations tuned for specific frequency bands.
- Thermal & Environmental Protection: Vacuum pressure impregnation (VPI), epoxy potting, custom bobbin moldings, and harsh-environment encapsulation.
- Rapid Prototyping & Testing: Fast sample turnaround with full electromagnetic simulation, thermal imaging, impulse testing, and complete compliance documentation.
Global OEM Applications Served
Triad inductors and chokes provide robust power conditioning and noise suppression across diverse critical industries:
- Industrial & Commercial Automation: Machine tool drives, variable frequency motor drives (VFDs), conveyor systems, and robotics controls.
- Renewable Energy Systems: Solar inverter output filters, wind power conditioning networks, and grid-tie power converters.
- Medical Equipment: Low-leakage common mode chokes for medical power units complying with IEC 60601-1 safety requirements.
- HVAC & Building Controls: Noise-suppressed power chokes for commercial compressor drives, smart dampers, and climate management networks.
- Audio & Sound Processing: Ultra-low distortion filter chokes for professional mixing consoles, broadcast transmitters, and high-fidelity power amplifiers.
Request Technical Specifications & Engineering Catalog
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