TDK Corporation’s EPCOS SurfIND series is a new range of current-compensated ring core double chokes for high currents and surface mounting. Customers preferring reflow soldering but also needing high-current common-mode chokes, now have an SMD solution. The components can filter common-mode noise for rated currents from 24 to 36 A at a temperature of 70°C. With additional cooling, even higher currents can be achieved. This is easy to implement as the top side can serve as a direct heat sink interface.
For applications up to 250 VAC, the nominal inductance ranges from 120 to 820 µH across seven variants. With stray inductance of up to one per cent of the nominal inductance, these chokes also dampen differential-mode noise.
All components meet IEC/EN 60938-2 standards and share a footprint of 40 by 38 mm, with heights of 20.7 mm for A types and 22.3 mm for B types.