We're a young company. Only open for production for about a year. In that year, we've delivered about 150,000 production units across six product lines. The units we've wound have been toroidal coils on grain-oriented 3% silicon-iron cores (Bsat 1.6 to 2.0T), powdered iron cores, ferrite cores (permeability 750 to 15,000), and bobbin-wound assemblies on plastic bobbins. These parts end up in current sensors for industrial power monitoring, switching power supplies, common mode chokes for EMI suppression, isolation transformers for medical equipment, and filter inductors for motor drives. The applications span building automation, factory floor energy management, HVAC controls, solar inverters, EV charging systems, battery management circuits, LED drivers, telecom power conditioning, test and measurement instrumentation, and defense electronics. Toroidal geometry keeps flux contained inside the core. That means lower radiated EMI, higher inductance per turn, and a smaller footprint at a given power rating. It matters in any design where board space is tight, noise budgets are strict, or efficiency losses compound at scale.
Every toroid gets wound with even distribution across the full 360 degrees of the core. We practice consistent tension, turn by turn, uniform magnetic field distribution, no localized hot spots, and repeatable DCR within tolerance. We've done multi-lap windings for high-count specs where single-layer coverage fills the window. We've wound 1,500 turns of 34 AWG on a 1.55" silicon-iron core, and 202 turns of 18 AWG on a bobbin. Our full range is 5 to 45 AWG wire and 20 to 2,500 turns. We are set up for customization, and will enthusiastically create toroids well outside these ranges within the bounds of physics.
If called for, we wrap cores in Mylar tape (3M Type 74 or equivalent) at some point in production. We cut leads to exact spec and tin the leads with SN100 lead-free solder. We source the wire gauge and core material the drawing calls for, from the usual to the exotic. If the unit requires a gauge or material outside what we've run, we source and test it in conversation with you.
Every unit tested before it ships. DCR measured at room temperature with a micro-ohmmeter. Inductance verified on an LCR meter at the specified test frequency. Hi-pot (dielectric withstand) testing on coupled inductors and transformers per IEC 60950. Visual and mechanical inspection for even distribution, insulation integrity, lead length, tinning quality, and overall dimensions. Full test data ships with every batch.
Saturation current, core loss, Q factor. Send us your testing requirements and we'll confirm what we can cover.
1,000 to 100,000 pieces per run. Prototypes and first articles. Mixed SKUs in a single batch. First orders typically take about two months from sample approval to delivery. Repeat orders run in as little as two weeks.
Varnish, epoxy encapsulation, or cased assemblies. Through-hole and surface mount terminations. Chassis mount, flying leads. Operating range rated −55°C to +155°C. Everything RoHS compliant. Everything lead-free. UL and CSA recognition available.
Send us your drawings or specifications. We'll review them and get back to you within one business day.
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