Chokes for Power Lines B82791-H Current-Compensated Ring Core Double Chokes B82791-G Rated voltage 250 Vac Rated current 0,25 to 0,7 A Rated inductance 4,7 to 47 mH Construction ■ Current-compensated ring core double choke with ferrite core ■ Polycarbonate case ■ Without potting ■ Sector winding Features ■ Vertical and horizontal versions ■ Case flame-retardant as per UL 94 V-0 ■ High resonance frequency owing to special winding technique and omission of potting ■ > 1 % stray inductance for symmetrical interference suppression Applications ■ Compact and narrow electronic lamp ballasts ■ Telecom applications such as NTBA, PCMx ■ Integrated power supplies for video recorders, ■ ■ ■ ■ portable TVs, SAT receivers, set-top boxes, video-on-demand Automation, e.g. sensor modules with integrated power supplies Electronic transformers, e.g. for halogen lamps Plug-in and portable power supplies and chargers for cellular and cordless phones Compact, modular and desktop power supplies Terminals ■ Fitting PCB standard grid Marking Ordering code, rated current, rated inductance, rated voltage, manufacturer, date of manufacture Approvals Approval marks Standards EN 60938-2 UL 1283 341 04/00 Chokes for Power Lines B82791-H Current-Compensated Ring Core Double Chokes B82791-G Dimensional drawing and pin configuration Vertical version (B82791-H) Horizontal version (B82791-G) General technical data Test voltage VT 1500 Vac, 2 s (line/line) Rated current IR Referred to 50 Hz and 40 °C ambient temperature Inductance tolerance − 30/+ 50 % Weight Approx. 3 g For further technical data see page 334 Characteristics and ordering codes IR A LR mH LS, typ µH Rtyp mΩ Ordering code vertical version horizontal version 0,25 0,3 0,35 0,4 0,5 0,6 0,7 47 30 22 15 10 6,8 4,7 750 400 350 225 150 100 70 2400 2200 1900 1350 1000 630 440 B82791-H2251-N20 B82791-H2301-N1 B82791-H2351-N1 B82791-H2401-N1 B82791-H2501-N1 B82791-H2601-N1 B82791-H2701-N1 B82791-G2251-N20 B82791-G2301-N1 B82791-G2351-N1 B82791-G2401-N1 B82791-G2501-N1 B82791-G2601-N1 B82791-G2701-N1 342 04/00 Chokes for Power Lines B82791-H Current-Compensated Ring Core Double Chokes B82791-G Impedance |Z | versus frequency f (measured with windings in parallel) SSB1397-L 10 6 Ω Z 10 5 10 4 - 10 3 10 2 10 1 4 10 10 5 *2251-N20 *2301-N1 *2351-N1 *2401-N1 *2501-N1 *2601-N1 *2701-N1 10 6 Hz 10 7 f 343 04/00