General Power Transformer <Pin Type: EI Series> Type: EI-25S ◆ Product Description ・28.0×21.0mm Max.(L×W), 21.0mm Max. Height. ・Custom design is available. ◆ Feature ・Max. Operating frequency 300kHz. Max. Operating power 36.0W(300kHz) ・Ideally used in Switching regulator, EL inverter and Power Factor Correction choke. ・RoHS Compliance 20.0 MAX. ＋ ＋ ＋ ＋ ＋ ＋ ＋ ＋ ＋1.0 －0.5 2.7 22.0 MAX. 5.0 5.0 5.0 ±0.3 27.0 MAX. φ0.8±0.1 ◆ Dimensions (mm) 12.5 ◆ Schematics (Bottom) 1. For General Transformer ④ ⑤ S S ③ ⑥ S ② ⑦ S ① ⑧ 2. For PFC choke ⑤ ④ “ S” is winding start ③ ⑥ S ② ⑦ S ① ⑧ “ S” is winding start ◆ Specification (For General Transformer) Sample No. Inductance (1-2) 1kHz/1V D.C.R. (1-2) (Ω Max.) Hi-pot Winding-winding (50/60Hz) 3370-T029 15.7mH ± 20% 3.5 AC 1500Vrms/1min. ◆ Specification (For PFC choke) Sample No. Inductance (6-8) 1kHz/1V (mΩ Max.) D.C.R. (6-8) Rated Current (6-8) 3370-T027 470μH ± 15% 370 1.5 A ※ Rated current: The DC current at which the inductance decreases to 90 % of it’s initial value or when △t=40℃, whichever is lower(Ta=20℃). Please refer to the sales offices on our website for a representative near you www.sumida.com 1/1