Size Dimen­sions 3D L
(mm)
W
(mm)
H
(mm)
Mount
EE13/7/4
13.72 20.45 10.8 THT
EE13/7/6
15 15.75 18.5 THT
EE16/7/5
- - - THT
EE16/8/5
- - - THT
EE20/10/6
- 25 16 THT
RM8
24.64 24.64 17.32 THT

Characteristics

Applications

  • Offline-switch mode power supplies
  • Especially designed for several ICs from STMicroelectronics
  • Auxiliary power supply
  • Home appliances
  • Consumer electronics

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Products

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EE13/7/4
EE13/7/6
EE16/7/5
EE16/8/5
EE20/10/6
RM8
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Order Code
Data­sheet
Simu­lation
Downloads
Status
VIN
VOut1 (V)
IOut1 (A)
VOut2 (V)
IOut2 (mA)
Vaux (V)
ISAT (A)
VT (V (AC))
fswitch (kHz)
L (mH)
NPRI : NSEC : NAUX
L (mm)
W (mm)
H (mm)
Mount
Size
Samples
WE-OLSTM Offline Flyback Transformers
750370702
60 - 187 V (AC), 12 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 60 - 187 V (AC)
Output Voltage 1 12 V
Output Current 1 1 A
Auxiliary Voltage 20 V
Saturation Current 1.2 A
Insulation Test Voltage 3200 V (AC)
Switching Frequency 67 - 97
Inductance 1.5 mH
Turns Ratio 5.6:1:0.52:0.8 
Length 22.2 mm
Width 25 mm
Height 16 mm
Mount THT 
Size EE20/10/6 
WE-OLSTM Offline Flyback Transformers
7508110351
64 - 265 V (AC), 12 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 64 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 0.5 A
Auxiliary Voltage 15 V
Saturation Current 0.53 A
Insulation Test Voltage 3000 V (AC)
Switching Frequency 54 - 66
Inductance 2.5 mH
Turns Ratio 5.57:1:1.24 
Length 15 mm
Width 15.75 mm
Height 18.5 mm
Mount THT 
Size EE13/7/6 
WE-OLSTM Offline Flyback Transformers
750370024
85 - 424 V (AC), 12 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 424 V (AC)
Output Voltage 1 12 V
Output Current 1 0.5 A
Auxiliary Voltage 16 V
Saturation Current 0.34 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 115
Inductance 1.6 mH
Turns Ratio 8:1:1.33 
Length 13.72 mm
Width 20.45 mm
Height 10.8 mm
Mount THT 
Size EE13/7/4 
WE-OLSTM Offline Flyback Transformers
750310660
85 - 265 V (AC), 12 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 0.5 A
Auxiliary Voltage 12 V
Insulation Test Voltage 3600 V (AC)
Switching Frequency 120
Inductance 1.2 mH
Turns Ratio 7.87:1:1 
Length 20.83 mm
Width 22.35 mm
Height 17.53 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
750871011
85 - 272 V (AC), 5 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 1 5 V
Output Current 1 1 A
Switching Frequency 50 - 140
Inductance 4 mH
Turns Ratio 21.9:1:2.9 
Length 20 mm
Width 24 mm
Height 16 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
750871010
85 - 272 V (AC), 5 V, 1 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 1 5 V
Output Current 1 1 A
Auxiliary Voltage 12 V
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60
Inductance 3.3 mH
Turns Ratio 14.36:1:2.27 
Length 20.32 mm
Width 24.58 mm
Height 16 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
750370026
85 - 272 V (AC), 12 V, 0.3 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 1 12 V
Output Current 1 0.3 A
Output Voltage 2 12 V
Output Current 2 300 mA
Auxiliary Voltage 12 V
Saturation Current 0.44 A
Insulation Test Voltage 3200 V (AC)
Switching Frequency 70 - 134
Inductance 3.9 mH
Turns Ratio 8.96:1:1:1 
Length 20.2 mm
Width 24.2 mm
Height 15.5 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
750871110
85 - 272 V (AC), 5 V, 2.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 1 5 V
Output Current 1 2.5 A
Auxiliary Voltage 10 V
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60
Inductance 1.6 mH
Turns Ratio 14.4:1:2 
Length 21 mm
Width 25 mm
Height 16 mm
Mount THT 
Size EE20/10/6 
WE-OLSTM Offline Flyback Transformers
750871111
85 - 272 V (AC), 5 V, 2.4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 1 5 V
Output Current 1 2.4 A
Auxiliary Voltage 12 V
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60
Inductance 1.7 mH
Turns Ratio 13.9:1:2.6 
Length 21 mm
Width 25 mm
Height 16 mm
Mount THT 
Size EE20/10/6 
WE-OLSTM Offline Flyback Transformers
760871131
85 - 297 V (AC), 12 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 297 V (AC)
Output Voltage 1 12 V
Output Current 1 0.5 A
Output Voltage 2 12 V
Output Current 2 500 mA
Auxiliary Voltage 15 V
Saturation Current 0.7 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60
Inductance 1.396 mH
Turns Ratio 9.6:1:1:1.2 
Length 22.2 mm
Width 25 mm
Height 16 mm
Mount THT 
Size EE20/10/6 
WE-OLSTM Offline Flyback Transformers
750370228
85 - 265 V (AC), 12 V, 1.25 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 1.25 A
Auxiliary Voltage 12 V
Saturation Current 1.325 A
Insulation Test Voltage 3900 V (AC)
Switching Frequency 50 - 60
Inductance 1.5 mH
Turns Ratio 8:1:1 
Length 22.2 mm
Width 25 mm
Height 16 mm
Mount THT 
Size EE20/10/6 
WE-OLSTM Offline Flyback Transformers
750314352
85 - 265 V (AC), 15 V, 0.7 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 15 V
Output Current 1 0.7 A
Output Voltage 2 6 V
Output Current 2 100 mA
Auxiliary Voltage 12 V
Saturation Current 0.82 A
Insulation Test Voltage 1500 V (AC)
Switching Frequency 115
Inductance 0.9 mH
Turns Ratio 11.9:1.33:1:2.11 
Length 18.5 mm
Width 16.5 mm
Height 18.8 mm
Mount THT 
Size EE16/7/5 
WE-OLSTM Offline Flyback Transformers
750314288
85 - 265 V (AC), -5 V, 0.8 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 -5 V
Output Current 1 0.8 A
Output Voltage 2 7 V
Output Current 2 420 mA
Saturation Current 0.5 A
Insulation Test Voltage 2000 V (AC)
Switching Frequency 60
Inductance 2.5 mH
Turns Ratio 14.2:1.4:1 
Length 18.5 mm
Width 16.5 mm
Height 18.8 mm
Mount THT 
Size EE16/7/5 
WE-OLSTM Offline Flyback Transformers
750871012
85 - 272 V (AC), 5 V, 2.4 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 1 5 V
Output Current 1 2.4 A
Auxiliary Voltage 14 V
Insulation Test Voltage 4500 V (AC)
Switching Frequency 50 - 140
Inductance 0.9 mH
Turns Ratio 14.75:1:2.75 
Length 20.32 mm
Width 24.38 mm
Height 16 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
750370423
85 - 265 V (AC), 5 V, 0.6 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 5 V
Output Current 1 0.6 A
Auxiliary Voltage 13.3 V
Saturation Current 0.6 A
Insulation Test Voltage 3900 V (AC)
Switching Frequency 115
Inductance 1.5 mH
Turns Ratio 13.33:1:2.78 
Length 15 mm
Width 15.75 mm
Height 18.5 mm
Mount THT 
Size EE13/7/6 
WE-OLSTM Offline Flyback Transformers
7508110341
85 - 265 V (AC), 12 V, 0.35 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 0.35 A
Auxiliary Voltage 15 V
Saturation Current 0.52 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 115
Inductance 1.5 mH
Turns Ratio 6.87:1:1.27 
Length 15 mm
Width 15.75 mm
Height 18.5 mm
Mount THT 
Size EE13/7/6 
WE-OLSTM Offline Flyback Transformers
7508110342
85 - 265 V (AC), 12 V, 0.35 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 0.35 A
Auxiliary Voltage 12 V
Saturation Current 0.58 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60
Inductance 1.2 mH
Turns Ratio 7.86:1:1.07 
Length 20.32 mm
Width 24.38 mm
Height 16 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
7508110110
85 - 265 V (AC), 5 V, 1.2 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 5 V
Output Current 1 1.2 A
Auxiliary Voltage 12 V
Saturation Current 0.6 A
Switching Frequency 115
Inductance 1.23 mH
Turns Ratio 15:1:2.3 
Length 20.32 mm
Width 24.38 mm
Height 16 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
750315363
85 - 265 V (AC), 12 V, 0.6 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 0.6 A
Auxiliary Voltage 5.1 V
Saturation Current 0.625 A
Insulation Test Voltage 3000 V (AC)
Switching Frequency 60
Inductance 2 mH
Turns Ratio 5.86:1:0.586 
Length 17 mm
Width 13.4 mm
Height 21.5 mm
Mount THT 
Size EE16/7/5 
WE-OLSTM Offline Flyback Transformers
7508110345
85 - 265 V (AC), 12 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 0.5 A
Auxiliary Voltage 6 V
Saturation Current 0.48 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60
Inductance 2 mH
Turns Ratio 5.78:1:0.52 
Length 17 mm
Width 13.4 mm
Height 21.5 mm
Mount THT 
Size EE16/7/5 
WE-OLSTM Offline Flyback Transformers
750316413
85 - 450 V (AC), 15 V, 0.6 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 450 V (AC)
Output Voltage 1 15 V
Output Current 1 0.6 A
Output Voltage 2 6 V
Output Current 2 100 mA
Auxiliary Voltage 13 V
Saturation Current 0.7 A
Insulation Test Voltage 1500 V (AC)
Switching Frequency 60
Inductance 1.5 mH
Turns Ratio 11.67:1.5:1:2.17 
Length 18.5 mm
Width 16.5 mm
Height 18.8 mm
Mount THT 
Size EE16/7/5 
WE-OLSTM Offline Flyback Transformers
750810014
85 - 265 V (AC), 5 V, 1.2 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 5 V
Output Current 1 1.2 A
Saturation Current 0.53 A
Insulation Test Voltage 1875 V (AC)
Switching Frequency 60
Inductance 2 mH
Turns Ratio 12.36:1 
Length 15 mm
Width 15.75 mm
Height 18.5 mm
Mount THT 
Size EE13/7/6 
WE-OLSTM Offline Flyback Transformers
750316878
85 - 265 V (AC), 13 V, 0.7 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 13 V
Output Current 1 0.7 A
Output Voltage 2 4.5 V
Output Current 2 100 mA
Auxiliary Voltage 15 V
Saturation Current 0.47 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 80
Inductance 2.2 mH
Turns Ratio 23.33:1.67:1:2.83 
Length 17.04 mm
Width 13.84 mm
Height 22.55 mm
Mount THT 
Size EE16/7/5 
WE-OLSTM Offline Flyback Transformers
750318330
85 - 265 V (AC), 12 V, 2.25 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1 12 V
Output Current 1 2.25 A
Auxiliary Voltage 12 V
Saturation Current 4.8 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 56 - 138
Inductance 0.15 mH
Turns Ratio 5:1:3.5 
Length 24.64 mm
Width 24.64 mm
Height 17.32 mm
Mount THT 
Size RM8 
WE-OLSTM Offline Flyback Transformers
750871030
85 - 272 V (AC), 12 V, 0.6 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 1 12 V
Output Current 1 0.6 A
Auxiliary Voltage 12 V
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60
Inductance 2.38 mH
Turns Ratio 9.55:1:1 
Length 20 mm
Width 24 mm
Height 16 mm
Mount THT 
Size EE16/8/5 
WE-OLSTM Offline Flyback Transformers
760871431
88 - 265 V (AC), 4.5 V, 0.15 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 88 - 265 V (AC)
Output Voltage 1 4.5 V
Output Current 1 0.15 A
Output Voltage 2 13 V
Output Current 2 420 mA
Auxiliary Voltage 12 V
Insulation Test Voltage 4500 V (AC)
Switching Frequency 55
Inductance 2 mH
Turns Ratio 27.67:1:3.17:1.22 
Length 18 mm
Width 16.5 mm
Height 18 mm
Mount THT 
Size EE16/7/5 
WE-OLSTM Offline Flyback Transformers
750344353
90 - 265 V (AC), 20 V, 2.25 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 90 - 265 V (AC)
Output Voltage 1 20 V
Output Current 1 2.25 A
Auxiliary Voltage 12 V
Saturation Current 2 A
Insulation Test Voltage 4000 V (AC)
Switching Frequency 60 - 150
Inductance 0.4 mH
Turns Ratio 7.5:1:2.33 
Length 24.64 mm
Width 24.64 mm
Height 17.32 mm
Mount THT 
Size RM8 
WE-OLSTM Offline Flyback Transformers
750817436
265 - 297 V (AC), 5 V, 0.5 A
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Input Voltage 265 - 297 V (AC)
Output Voltage 1 5 V
Output Current 1 0.5 A
Output Voltage 2 12 V
Output Current 2 220 mA
Auxiliary Voltage 15 V
Saturation Current 0.42 A
Insulation Test Voltage 3000 V (AC)
Switching Frequency 115
Inductance 2.3 mH
Turns Ratio 19.14:1:2.43:3 
Length 18.5 mm
Width 16.5 mm
Height 18.8 mm
Mount THT 
Size EE16/7/5