EMC/RFI Chokes RT Series N

RT series N common mode chokes from Schaffner deliver higher performance than previous versions while retaining the same mechanical volume. This series is based on nanocrystalline core technology and achieves up to 15 dB higher attenuation performance than its ferrite-based predecessor across relevant frequency bands of the electromagnetic compatibility (EMC) frequency spectrum. By filtering electromagnetic common mode noise on the grid side of an electrical device, the RT series N eliminates the problem of electromagnetic interference (EMI) directly on a PCB. The choke is the same 65 mm in diameter as the existing series, but it provides designers with more power while having to work within tight space restrictions and reduces the need to use an external EMC filter.

With rated currents from 25 A to 63 A at +60°C and operational voltages up to 600 V_AC and 450 V_DC, this choke is particularly suited for use at frequencies from 10 MHz to 30 MHz. Ensuring cost-effective PCB designs for up to 100 A with forced cooling, the choke is available in horizontal and vertical PCB mounting options to suit specific design requirements. Other features include a broad range of inductance ratings from 3 mH to 13 mH, low magnetic leakage flux, and superior winding insulation. Offering a choice of 2-wire and 3-wire configurations for DC, 2-line AC, and 3-phase applications, this choke is ideal for machine and electronics manufacturers that have power demand for their applications from 10 kW to 80 kW. This high-quality choke features an approved UL insulation system which enables customizations to be achieved with ease.

Typical applications include photovoltaic inverters, converters, uninterruptible power supplies (UPS) and switch-mode power supplies, LED lighting, communication devices, and medical/laboratory equipment. These chokes are also ideal for use in power supplies that are used in EV charging stations and robotics. While not all applications will require the extra power provided by the RT series N, designers will be able to use the choke as a safety option to improve EMC levels should a measurement fail.