Project Description

ER CORES

The ER core design is derived from the original E cores. Like ETD cores and EC cores, it has a round center pole and outer legs with a radius to accommodate round coil formers. These cores are mainly used for power transformers. The round center pole allows the use of thicker wires while the shorter turn length keeps the copper losses low.

Summary

  • Round center pole
  • Outer legs with a radius
  • Moderate shielding
TypeMaterialLef [mm] *Aef [mm2] *Vef [mm3] *AL [nH/turns2]Gap [µm]µeROHSSpecifications
ER28/14/11-3C903C906481.452602900±25%ungapped≈1800YES
ER28/14/11-3C943C946481.452603100±25%ungapped≈1940YES
ER28/14/11-3C94-G10003C946481.45260≈100≈1000≈62YES
ER28/14/11-3C94-G2003C946481.45260≈450≈200≈280YES
ER28/14/11-3C94-G5003C946481.45260≈190≈500
≈120YES
ER28/17/11-3C903C9075.581.461402500±25%ungapped≈1850YES
ER28/17/11-3C943C9475.581.461402500±25%ungapped≈1850YES
ER28/17/11-3C94-G10003C9475.581.46140≈99≈1000≈73YES
ER28/17/11-3C94-G2003C9475.581.46140≈440≈200≈320YES
ER28/17/11-3C94-G5003C9475.581.46140≈190≈500≈140YES
ER35/21/11-3C903C9090.810797102800±25%ungapped≈1900YES
ER35/21/11-3C943C9490.810797102800±25%ungapped≈1900YES
ER35/21/11-3C94-G10003C9490.81079710≈130≈1000≈87YES
ER35/21/11-3C94-G2003C9490.81079710≈560≈200≈380YES
ER35/21/11-3C94-G5003C9490.81079710≈250≈500≈170YES
ER35W/21/11-3C943C9492.710395483000±25%ungapped≈2150YES
ER35W/21/11-3C94-G10003C9492.71039548≈120≈1000≈89YES
ER35W/21/11-3C94-G2003C9492.71039548≈540≈200≈390YES
ER35W/21/11-3C94-G5003C9492.71039548≈240≈500≈170YES
ER40/22/13-3C903C9098149146003600±25%ungapped≈1900YES
ER40/22/13-3C943C9498149146003600±25%ungapped≈1900YES
ER40/22/13-3C94-G10003C949814914600≈180≈1000≈94YES
ER40/22/13-3C94-G2003C949814914600≈770≈200
≈400YES
ER40/22/13-3C94-G5003C949814914600≈350≈500≈180YES
ER42/22/15-3C903C9099170168003500±25%ungapped≈1600YES
ER42/22/15-3C943C9499170168004000±25%ungapped≈1850
YES
ER42/22/15-3C94-G10003C949917016800≈200≈1000≈95YES
ER42/22/15-3C94-G2003C949917016800≈880≈200≈410YES
ER42/22/15-3C94-G5003C949917016800≈390≈500≈180YES
ER42/22/16-3C903C9098.8
194
19200
4600±25%ungapped≈1900YES
ER42/22/16-3C943C9498.8194192004600±25%ungapped≈1900YES
ER42/22/16-3C94-G10003C9498.819419200≈230≈1000
≈95YES
ER42/22/16-3C94-G2003C9498.819419200≈1000≈200≈410YES
ER42/22/16-3C94-G5003C9498.819419200≈450≈500≈180YES
ER48/18/18-3C903C9087231203006400±25%ungapped≈1900YES
ER48/18/18-3C943C9487231203006400±25%ungapped≈1900YES
ER48/18/18-3C94-G10003C948723120300≈280≈1000≈84YES
ER48/18/18-3C94-G2003C948723120300≈1200
≈200≈370YES
ER48/18/18-3C94-G5003C948723120300≈540≈500≈160YES
ER48/21/21-3C903C90
100255255005700±25%ungapped≈1800YES
ER48/21/21-3C943C94100255255005700±25%ungapped≈1800YES
ER48/21/21-3C94-G10003C9410025525500≈310≈1000≈96YES
ER48/21/21-3C94-G2003C9410025525500≈1300≈200
≈410YES
ER48/21/21-3C94-G5003C9410025525500≈590≈500
≈184YES
ER54/18/18-3C90-G12003C9091.825023000≈250≈1200≈74YES
ER54/18/18-3C943C9491.8250230006100±25%ungapped≈1800YES
ER54/18/18-3C94-G10003C9491.825023000≈300≈1000≈88YES
ER54/18/18-3C94-G2003C9491.825023000≈1300≈200≈380
YES
ER54/18/18-3C94-G5003C9491.825023000≈580
≈500≈170YES