General Power Transformer <Pin Type: EI Series>
Type: EI-25S
Please refer to the sales offices on our website for a representative near you
www.sumida.com 1/1
◆ 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
◆ Dimensions (mm)
◆ Schematics (Bottom)
1. For General Transformer 2. For PFC choke
“ S” is winding start “ S” is winding start
◆ Specification (For General Transformer)
◆ Specification (For PFC choke)
※ 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℃).
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.
Sample No.
Inductance (6-8)
1kHz/1V
D.C.R. (6-8)
(mΩ Max.)
Rated Current
(6-8)
3370-T027
470μH ± 15%
370
1.5 A
20.0 MAX.
22.0 MAX.
27.0 MAX.
φ0.8±0.1
2.7
-0.5
+1.0
5.0
5.0
5.0
12.5
+
+
+
+
+
+
+
+
±0.3
S
S
S
①
②
③
④
⑤
⑥
⑦
⑧
S
①
②
③
④
⑤
⑥
⑦
⑧
S
S