As of April 12, 2011

Organization Requirements Standard No.*1 Cert. No. Rating Models
UL UL 2353
UL 1950-3e/IEC 60950,
Annex U
(E157568, OCDT2)*2
Basic Insulation
354Vpeak or DC
E (120°C)*3
CSA NRTL/C CAN/CSA-C22.2 No. 60950-1-07
ANSI/UL 660950-1:2nd Ed.
CAN/CSA-C22.2 No. 60065-03, AM1
ANSI/UL 60065-2007
IEC 60065:2001, AM1:2006, AM2:2010
IEC 60950:2005 (2nd Ed), A1:2009
EN 60950-1:2006, A11:2009
185274 (LR104155)*4 Basic Insulation
354Vpeak or DC
VDE DIN EN 60950-1:2006 + A11
(VDE 0805Teil 1+A11):2009-11;
EN 60950-1:2006 + A11:2009-03,
IEC60950-1 (ed.2)
DIN EN 60065
(VDE 0860):2009-07
EN 60065:2002 + A1:2006
+ A11:2008-11,
IEC 60065:2001, modified + A1:2005, modified
VDE-Reg.-Nr.123079 Basic Insulation
420Vpeak or DC
Max. 500kHz
Class “E”
  1. FSX-E is an insulated winding wire for Telecommunication Network Voltage circuits and is recognized as Basic Insulation complied with, Annex U of IEC 60950 3rd, IEC 60950-1 and subclause 8.17, Annex H of IEC 60065 7th. Normal Withstand Test Voltage is 1.5kVrms for 1 minute. FSX-E also complies with 3kVrms for 1minute as a twisted pair.
  2. UL changed the category of FSX-E from OCDT2 to OBJT2. Therefore, FSX-E wire acquired new UL File No and the category. The product covered by E206440 (OBJT2) is quite the same as the product covered by E157568 (OCDT2). These product can be used compatibly each other.
  3. When operation temperatures of the wound components exceed Class A (105°C), it is required in accordance with appropriated Insulation System UL 1446/IEC 61857 regardless of temperature rating of each materials/wires.
  4. Numbering system of CSA was revised at 2000.