ComponentsPassive ComponentsPower MagneticsTransformers For AC/DC Converter

WE-OLSTM Offline Flyback Transformers

WE-OLSTM Offline Flyback Transformers
SizeDimen­sions3DL
(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

LTSpice files

Characteristics

  • Nominal input voltage: 85–265 VAC (120–375 VDC)
  • Operating temperature: –40 °C to +125 °C
  • Isolation voltage: 2 kVAC up to 5 kVAC
  • Multiple output options
  • Options for fixed frequency or quasi-resonant mode operation
  • Most products meet reinforced insulation

Reference Designs

Applications

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

Application Notes

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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
SamplesAvailability & Sample
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WE-OLSTM Offline Flyback Transformers
750370702
SPEC60 - 187 V (AC), 12 V, 1 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 60 - 187 V (AC)
Output Voltage 112 V
Output Current 11 A
–
–
Auxiliary Voltage20 V
Saturation Current1.2 A
Insulation Test Voltage3200 V (AC)
Switching Frequency 67 - 97
Inductance1.5 mH
Turns Ratio5.6:1:0.52:0.8 
Length22.2 mm
Width25 mm
Height16 mm
MountTHT 
SizeEE20/10/6 
Request
WE-OLSTM Offline Flyback Transformers
7508110351
SPEC64 - 265 V (AC), 12 V, 0.5 A
Simu­lation
Availability
Request
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 64 - 265 V (AC)
Output Voltage 112 V
Output Current 10.5 A
–
–
Auxiliary Voltage15 V
Saturation Current0.53 A
Insulation Test Voltage3000 V (AC)
Switching Frequency 54 - 66
Inductance2.5 mH
Turns Ratio5.57:1:1.24 
Length15 mm
Width15.75 mm
Height18.5 mm
MountTHT 
SizeEE13/7/6 
Request
WE-OLSTM Offline Flyback Transformers
750370024
SPEC85 - 424 V (AC), 12 V, 0.5 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 424 V (AC)
Output Voltage 112 V
Output Current 10.5 A
–
–
Auxiliary Voltage16 V
Saturation Current0.34 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 115
Inductance1.6 mH
Turns Ratio8:1:1.33 
Length13.72 mm
Width20.45 mm
Height10.8 mm
MountTHT 
SizeEE13/7/4 
Request
WE-OLSTM Offline Flyback Transformers
750310660
SPEC85 - 265 V (AC), 12 V, 0.5 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 10.5 A
–
–
Auxiliary Voltage12 V
–
Insulation Test Voltage3600 V (AC)
Switching Frequency 120
Inductance1.2 mH
Turns Ratio7.87:1:1 
Length20.83 mm
Width22.35 mm
Height17.53 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
750871011
SPEC85 - 272 V (AC), 5 V, 1 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 15 V
Output Current 11 A
–
–
–
–
–
Switching Frequency 50 - 140
Inductance4 mH
Turns Ratio21.9:1:2.9 
Length20 mm
Width24 mm
Height16 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
750871010
SPEC85 - 272 V (AC), 5 V, 1 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 15 V
Output Current 11 A
–
–
Auxiliary Voltage12 V
–
Insulation Test Voltage4000 V (AC)
Switching Frequency 60
Inductance3.3 mH
Turns Ratio14.36:1:2.27 
Length20.32 mm
Width24.58 mm
Height16 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
750370026
SPEC85 - 272 V (AC), 12 V, 0.3 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 112 V
Output Current 10.3 A
Output Voltage 212 V
Output Current 2300 mA
Auxiliary Voltage12 V
Saturation Current0.44 A
Insulation Test Voltage3200 V (AC)
Switching Frequency 70 - 134
Inductance3.9 mH
Turns Ratio8.96:1:1:1 
Length20.2 mm
Width24.2 mm
Height15.5 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
750871110
SPEC85 - 272 V (AC), 5 V, 2.5 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 15 V
Output Current 12.5 A
–
–
Auxiliary Voltage10 V
–
Insulation Test Voltage4000 V (AC)
Switching Frequency 60
Inductance1.6 mH
Turns Ratio14.4:1:2 
Length21 mm
Width25 mm
Height16 mm
MountTHT 
SizeEE20/10/6 
Request
WE-OLSTM Offline Flyback Transformers
750871111
SPEC85 - 272 V (AC), 5 V, 2.4 A

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 15 V
Output Current 12.4 A
–
–
Auxiliary Voltage12 V
–
Insulation Test Voltage4000 V (AC)
Switching Frequency 60
Inductance1.7 mH
Turns Ratio13.9:1:2.6 
Length21 mm
Width25 mm
Height16 mm
MountTHT 
SizeEE20/10/6 
Request
WE-OLSTM Offline Flyback Transformers
760871131
SPEC85 - 297 V (AC), 12 V, 0.5 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 297 V (AC)
Output Voltage 112 V
Output Current 10.5 A
Output Voltage 212 V
Output Current 2500 mA
Auxiliary Voltage15 V
Saturation Current0.7 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 60
Inductance1.396 mH
Turns Ratio9.6:1:1:1.2 
Length22.2 mm
Width25 mm
Height16 mm
MountTHT 
SizeEE20/10/6 
Request
WE-OLSTM Offline Flyback Transformers
750370228
SPEC85 - 265 V (AC), 12 V, 1.25 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 11.25 A
–
–
Auxiliary Voltage12 V
Saturation Current1.325 A
Insulation Test Voltage3900 V (AC)
Switching Frequency 50 - 60
Inductance1.5 mH
Turns Ratio8:1:1 
Length22.2 mm
Width25 mm
Height16 mm
MountTHT 
SizeEE20/10/6 
Request
WE-OLSTM Offline Flyback Transformers
750314352
SPEC85 - 265 V (AC), 15 V, 0.7 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 115 V
Output Current 10.7 A
Output Voltage 26 V
Output Current 2100 mA
Auxiliary Voltage12 V
Saturation Current0.82 A
Insulation Test Voltage1500 V (AC)
Switching Frequency 115
Inductance0.9 mH
Turns Ratio11.9:1.33:1:2.11 
Length18.5 mm
Width16.5 mm
Height18.8 mm
MountTHT 
SizeEE16/7/5 
Request
WE-OLSTM Offline Flyback Transformers
750314288
SPEC85 - 265 V (AC), -5 V, 0.8 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 1-5 V
Output Current 10.8 A
Output Voltage 27 V
Output Current 2420 mA
–
Saturation Current0.5 A
Insulation Test Voltage2000 V (AC)
Switching Frequency 60
Inductance2.5 mH
Turns Ratio14.2:1.4:1 
Length18.5 mm
Width16.5 mm
Height18.8 mm
MountTHT 
SizeEE16/7/5 
Request
WE-OLSTM Offline Flyback Transformers
750871012
SPEC85 - 272 V (AC), 5 V, 2.4 A
Simu­lation
Availability
Request
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 15 V
Output Current 12.4 A
–
–
Auxiliary Voltage14 V
–
Insulation Test Voltage4500 V (AC)
Switching Frequency 50 - 140
Inductance0.9 mH
Turns Ratio14.75:1:2.75 
Length20.32 mm
Width24.38 mm
Height16 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
750370423
SPEC85 - 265 V (AC), 5 V, 0.6 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 15 V
Output Current 10.6 A
–
–
Auxiliary Voltage13.3 V
Saturation Current0.6 A
Insulation Test Voltage3900 V (AC)
Switching Frequency 115
Inductance1.5 mH
Turns Ratio13.33:1:2.78 
Length15 mm
Width15.75 mm
Height18.5 mm
MountTHT 
SizeEE13/7/6 
Request
WE-OLSTM Offline Flyback Transformers
7508110341
SPEC85 - 265 V (AC), 12 V, 0.35 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 10.35 A
–
–
Auxiliary Voltage15 V
Saturation Current0.52 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 115
Inductance1.5 mH
Turns Ratio6.87:1:1.27 
Length15 mm
Width15.75 mm
Height18.5 mm
MountTHT 
SizeEE13/7/6 
Request
WE-OLSTM Offline Flyback Transformers
7508110342
SPEC85 - 265 V (AC), 12 V, 0.35 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 10.35 A
–
–
Auxiliary Voltage12 V
Saturation Current0.58 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 60
Inductance1.2 mH
Turns Ratio7.86:1:1.07 
Length20.32 mm
Width24.38 mm
Height16 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
7508110110
SPEC85 - 265 V (AC), 5 V, 1.2 A
Simu­lation
Availability
Request
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 15 V
Output Current 11.2 A
–
–
Auxiliary Voltage12 V
Saturation Current0.6 A
–
Switching Frequency 115
Inductance1.23 mH
Turns Ratio15:1:2.3 
Length20.32 mm
Width24.38 mm
Height16 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
750315363
SPEC85 - 265 V (AC), 12 V, 0.6 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 10.6 A
–
–
Auxiliary Voltage5.1 V
Saturation Current0.625 A
Insulation Test Voltage3000 V (AC)
Switching Frequency 60
Inductance2 mH
Turns Ratio5.86:1:0.586 
Length17 mm
Width13.4 mm
Height21.5 mm
MountTHT 
SizeEE16/7/5 
Request
WE-OLSTM Offline Flyback Transformers
7508110345
SPEC85 - 265 V (AC), 12 V, 0.5 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 10.5 A
–
–
Auxiliary Voltage6 V
Saturation Current0.48 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 60
Inductance2 mH
Turns Ratio5.78:1:0.52 
Length17 mm
Width13.4 mm
Height21.5 mm
MountTHT 
SizeEE16/7/5 
Request
WE-OLSTM Offline Flyback Transformers
750316413
SPEC85 - 450 V (AC), 15 V, 0.6 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 450 V (AC)
Output Voltage 115 V
Output Current 10.6 A
Output Voltage 26 V
Output Current 2100 mA
Auxiliary Voltage13 V
Saturation Current0.7 A
Insulation Test Voltage1500 V (AC)
Switching Frequency 60
Inductance1.5 mH
Turns Ratio11.67:1.5:1:2.17 
Length18.5 mm
Width16.5 mm
Height18.8 mm
MountTHT 
SizeEE16/7/5 
Request
WE-OLSTM Offline Flyback Transformers
750810014
SPEC85 - 265 V (AC), 5 V, 1.2 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 15 V
Output Current 11.2 A
–
–
–
Saturation Current0.53 A
Insulation Test Voltage1875 V (AC)
Switching Frequency 60
Inductance2 mH
Turns Ratio12.36:1 
Length15 mm
Width15.75 mm
Height18.5 mm
MountTHT 
SizeEE13/7/6 
Request
WE-OLSTM Offline Flyback Transformers
750316878
SPEC85 - 265 V (AC), 13 V, 0.7 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 113 V
Output Current 10.7 A
Output Voltage 24.5 V
Output Current 2100 mA
Auxiliary Voltage15 V
Saturation Current0.47 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 80
Inductance2.2 mH
Turns Ratio23.33:1.67:1:2.83 
Length17.04 mm
Width13.84 mm
Height22.55 mm
MountTHT 
SizeEE16/7/5 
Request
WE-OLSTM Offline Flyback Transformers
750318330
SPEC85 - 265 V (AC), 12 V, 2.25 A
Simu­lation
Availability
Request
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 12.25 A
–
–
Auxiliary Voltage12 V
Saturation Current4.8 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 56 - 138
Inductance0.15 mH
Turns Ratio5:1:3.5 
Length24.64 mm
Width24.64 mm
Height17.32 mm
MountTHT 
SizeRM8 
Request
WE-OLSTM Offline Flyback Transformers
750871030
SPEC85 - 272 V (AC), 12 V, 0.6 A
Simu­lation
Availability
Request
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 85 - 272 V (AC)
Output Voltage 112 V
Output Current 10.6 A
–
–
Auxiliary Voltage12 V
–
Insulation Test Voltage4000 V (AC)
Switching Frequency 60
Inductance2.38 mH
Turns Ratio9.55:1:1 
Length20 mm
Width24 mm
Height16 mm
MountTHT 
SizeEE16/8/5 
Request
WE-OLSTM Offline Flyback Transformers
760871431
SPEC88 - 265 V (AC), 4.5 V, 0.15 A
Simu­lation
Availability
Request
Downloads11 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 88 - 265 V (AC)
Output Voltage 14.5 V
Output Current 10.15 A
Output Voltage 213 V
Output Current 2420 mA
Auxiliary Voltage12 V
–
Insulation Test Voltage4500 V (AC)
Switching Frequency 55
Inductance2 mH
Turns Ratio27.67:1:3.17:1.22 
Length18 mm
Width16.5 mm
Height18 mm
MountTHT 
SizeEE16/7/5 
Request
WE-OLSTM Offline Flyback Transformers
750344353
SPEC90 - 265 V (AC), 20 V, 2.25 A
Simu­lation
Availability
Request
Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 90 - 265 V (AC)
Output Voltage 120 V
Output Current 12.25 A
–
–
Auxiliary Voltage12 V
Saturation Current2 A
Insulation Test Voltage4000 V (AC)
Switching Frequency 60 - 150
Inductance0.4 mH
Turns Ratio7.5:1:2.33 
Length24.64 mm
Width24.64 mm
Height17.32 mm
MountTHT 
SizeRM8 
Request
WE-OLSTM Offline Flyback Transformers
750817436
SPEC265 - 297 V (AC), 5 V, 0.5 A
Simu­lation
Availability
Request
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Input Voltage 265 - 297 V (AC)
Output Voltage 15 V
Output Current 10.5 A
Output Voltage 212 V
Output Current 2220 mA
Auxiliary Voltage15 V
Saturation Current0.42 A
Insulation Test Voltage3000 V (AC)
Switching Frequency 115
Inductance2.3 mH
Turns Ratio19.14:1:2.43:3 
Length18.5 mm
Width16.5 mm
Height18.8 mm
MountTHT 
SizeEE16/7/5 
Request