Storage Chokes DS Series, in encapsulated version Nominal current: Nominal inductance: Max. working voltage: Application range: Isolation voltage: Climatic category: Plastic case Potting resin: 0.5 - 6 A @ a 70C 35 - 1000 H/ tol. 15% 600 VDC up to 1 MHz 2 kV eff. / wdg.-ambient 40/125/21 acc. to IEC 60068-1 UL 94 V-0 UL 94 V-0 Application Execution Storage chokes, wound on powdered MPP core, specially qualify for use as storage of energy in switched power supplies (switching mode regulators). Switched power supplies allow small size with high efficiency and stabilized output voltage. Most important features of this line of chokes are the following: Storage chokes of series DS are encapsulated into a plastic cases. * reduced magnetic reversal * small size * constant inductance at high alternating field modulation and large DC magnetization. Technical Data Type IN (1) [A] DS1-17.5-0.5-800/a DS1-17.5-0.63-500/a DS1-17.5-1.0-200/a DS1-17.5-1.4-100/a DS1-17.5-3.0-35/a DS1-20-0.63-1000/a DS1-20-1.4-200/a DS1-20-3.15-40/a DS1-25-1.4-500/a DS1-25-2.0-200/a DS1-25-3.15-100/a DS1-30-3.15-150/a DS1-30-4-100/a DS1-40-4.0-200/a DS1-40-6.0-100/a DS1-48-3.15-1000/a DS1-48-4-500/a 0.5 0.63 1.0 1.4 3.0 0.63 1.4 3.15 1.4 2.0 3.15 3.15 4.0 4.0 6.0 3.15 4.0 LN (2) [H] 800 500 200 100 35 1000 200 40 500 200 100 150 100 200 100 1000 500 (1) @ a 70C; current derating over 70C: I = I N x [m] [MHz] ~ fRes L [%] L at IN 700 500 180 80 26 700 175 26 200 100 40 55 36 55 26 160 80 2 2.5 5 6.5 11 1.2 4 10 1 3.5 5.7 4.5 6 3 4.5 1 1.5 < 15 < 15 < 15 < 20 < 20 < 15 < 15 < 15 < 20 < 20 < 20 < 15 < 20 < 20 < 20 < 20 < 20 Rcu (3) Cases L x D x H [mm] 17.5 x 16.5 x 10.5 17.5 x 16.5 x 10.5 17.5 x 16.5 x 10.5 17.5 x 16.5 x 10.5 17.5 x 16.5 x 10.5 20.0 x 20.0 x 15.0 20.0 x 20.0 x 15.0 20.0 x 20.0 x 15.0 25.0 x 25.0 x 15.0 25.0 x 25.0 x 15.0 25.0 x 25.0 x 15.0 30.0 x 30.0 x 15.0 30.0 x 30.0 x 15.0 40.0 x 40.0 x 20.0 40.0 x 40.0 x 20.0 48.0 x 48.0 x 25.0 48.0 x 48.0 x 25.0 Grid I x b [mm] 15.0 x 12.5 15.0 x 12.5 15.0 x 12.5 15.0 x 12.5 15.0 x 12.5 15.0 x 15.0 15.0 x 15.0 15.0 x 15.0 20.0 x 20.0 20.0 x 20.0 20.0 x 20.0 22.5 x 22.5 22.5 x 22.5 32.5 x 32.5 32.5 x 32.5 37.5 x 37.5 37.5 x 37.5 Connection pins [mm] 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.7 1 1 1 1 1 1.5 1.5 1.5 1.5 t [mm] 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 (125-a)/55 (2) Nominal inductance measured according to EN 138100, see introduction of this catalog, paragraph 3.4 (3) Resistance @ a 25C All types are also available in open version, DSO1 with relative mounting accessories see page 23. Mechanical dimensions DS1 Application Switch-mode 33