Frame Core Power Line Chokes with Vertical Design
TDK Corporation has extended its range of EPCOS frame core power line chokes with the B82733V series in a vertical design. The new series complements the existing horizontally designed B82733F series. The vertical design is particularly advantageous when there is limited space on the printed circuit board. With an insertion height of 27 mm, for example, the new chokes have a footprint of just 29 mm x 15.5 mm. This is more than 30 percent smaller than that of the horizontal version which, with a height of 14 mm, requires an area of 26.5 mm x 24.8 mm.
The current-compensated chokes are designed for a maximum voltage of 300 Vac and offer inductance values of between 10 mH and 100 mH. At an operating temperature of 40 degrees C, the chokes can handle rated currents of between 0.7A and 2.3A. Both the plastic frame and the epoxy resin coating meet UL94 V-0
In addition to their good common-mode suppression, the chokes feature good differential-mode suppression thanks to their relatively high stray inductance of about two percent. In many cases this means that no additional components for differential-mode suppression are required. The chokes are therefore particularly suitable for new designs of switch-mode power supplies with high switching frequencies.
The new components are approved according to ENEC (VDE) and UL and are RoHS-compatible. Main applications are expected to include low- to medium-power switch-mode power supplies. Main features and benefits include: Footprint reduced by more than 30 percent; Good suppression of both common-mode and differential-mode interference; and Approved according to ENEC (VDE) and UL.
