Coil Formers

Coil formers are components found in a transformer(an electrical device that transfers energy between two or more circuits). They're commonly used in electrical printed circuit boards(PCBs) to produce the energy needed to power electrical machines such as motors and generators.

Coil former applications

Coil formers are commonly used in transformers or as reactors in switch-mode power supplies. Transformers are used to bring voltage up or down in an AC electrical circuit. Both transformers and switch-mode power supplies can be used to convert mains AC power to DC power.

There are transformers all over every house. They are inside the chargers used to charge your mobile phone and other personal computing devices. They're also found in loudspeakers and microphones.

Advantages of using coil formers

  • Coil formers come in different types depending on whether you need to mount them horizontally or vertically.
  • Coil formers are usually made with an insulating material, such as thermosetting plastic, and are resistant to soldering and soldering heat.

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Description Price Accessory Type For Use With Dimensions Number of Pins Material Depth Length Width Maximum Temperature
RS Stock No. 167-0164
Mfr. Part No.B66398W1024T001
BrandEPCOS
TWD72.90
Each (In a Box of 40)
units
ETD 59/31/22 Coil Former B66397 66.9 x 66.2 x 49.2mm 24 GFR Polyterephthalate 49.2mm 66.9mm 66.2mm +180°C
RS Stock No. 647-9525
Mfr. Part No.B66398W1024T001
BrandEPCOS
TWD118.00
Each
units
ETD 59/31/22 Coil Former B66397 66.9 x 66.2 x 49.2mm 24 GFR Polyterephthalate 49.2mm 66.9mm 66.2mm +180°C
RS Stock No. 125-3619
Mfr. Part No.B66230A1114T001
BrandEPCOS
TWD74.40
Each (In a Pack of 5)
units
Horizontal Coil Former E 32/16/9 Core - 14 GFR Polyterephthalate - 37.5mm 35mm +155°C
RS Stock No. 167-0500
Mfr. Part No.B66418W1008D001
BrandEPCOS
TWD23.10
Each (In a Box of 630)
units
EFD 20/10/7 Coil Former B66417 20 x 20.3 x 10.4mm 8 GFR Thermosetting Plastic 10.4mm 20mm 20.3mm +180°C
RS Stock No. 647-9553
Mfr. Part No.B66418W1008D001
BrandEPCOS
TWD43.80
Each (In a Pack of 5)
units
EFD 20/10/7 Coil Former B66417 20 x 20.3 x 10.4mm 8 GFR Thermosetting Plastic 10.4mm 20mm 20.3mm +180°C
RS Stock No. 170-1502
Mfr. Part No.B66230A1114T001
BrandEPCOS
TWD40.90
Each (On a Reel of 240)
units
Horizontal Coil Former E 32/16/9 Core - 14 GFR Polyterephthalate - 37.5mm 35mm +155°C
RS Stock No. 125-3385
Mfr. Part No.B65808N1006D002
BrandEPCOS
TWD33.10
Each (In a Pack of 10)
units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
RS Stock No. 647-9143
Mfr. Part No.B65808E1508T001
BrandEPCOS
TWD45.60
Each (In a Pack of 5)
units
RM 6 Coil Former B65807 18.4 x 16 x 12.65mm 8 GFR Polyterephthalate 12.65mm 18.4mm 16mm +155°C
RS Stock No. 125-3383
Mfr. Part No.B65808N1006D001
BrandEPCOS
TWD33.90
Each (In a Pack of 10)
units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
RS Stock No. 167-8498
Mfr. Part No.B65808E1508T001
BrandEPCOS
TWD25.10
Each (In a Box of 500)
units
RM 6 Coil Former B65807 18.4 x 16 x 12.65mm 8 GFR Polyterephthalate 12.65mm 18.4mm 16mm +155°C
RS Stock No. 170-1435
Mfr. Part No.B65808N1006D002
BrandEPCOS
TWD22.00
Each (On a Reel of 500)
units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
RS Stock No. 170-1434
Mfr. Part No.B65808N1006D001
BrandEPCOS
TWD20.90
Each (On a Reel of 500)
units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
RS Stock No. 167-0495
Mfr. Part No.B66422W1010D001
BrandEPCOS
TWD23.80
Each (In a Box of 325)
units
EFD 25/13/9 Coil Former B66421 25 x 26 x 12.9mm 10 GFR Thermosetting Plastic 12.9mm 25mm 26mm +180°C
RS Stock No. 213-3922
Mfr. Part No.B66362W1014T001
BrandEPCOS
TWD66.00
Each
units
ETD 34 B66361G - 14 GFR Polyterephthalate - - - +180°C
RS Stock No. 125-3351
Mfr. Part No.B65652B0000T001
BrandEPCOS
TWD7.70
Each (In a Pack of 50)
units
Vertical Coil Former P 18 x 11 Core - - GFR Polyterephthalate - - 14.8 (Dia.)mm +155°C
RS Stock No. 170-7480
Mfr. Part No.FS-2E-4215-10
BrandBlock
TWD177.60
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 212-6722
Mfr. Part No.B65816C1512T001
BrandEPCOS
TWD57.80
Each (In a Pack of 5)
units
RM 12 Coil Former B65815 38.4 x 28.4 x 23.4mm 12 GFR Polyterephthalate 23.4mm 38.4mm 28.4mm +155°C
RS Stock No. 167-8580
Mfr. Part No.B65687A1018T001
BrandEPCOS
TWD257.10
Each (In a Box of 10)
units
PM 74/59 Coil Former B65686 85.5 x 57.3 x 57.8mm 18 GFR Polyterephthalate 57.8mm 85.5mm 57.3mm +155°C
RS Stock No. 125-3612
Mfr. Part No.B66206C1012T001
BrandEPCOS
TWD40.50
Each (In a Pack of 10)
units
Horizontal Coil Former E 20/10/6 Core - 12 GFR Polyterephthalate - 21.5mm 23.5mm +155°C
RS Stock No. 167-8204
Mfr. Part No.B66396W1022T001
BrandEPCOS
TWD67.10
Each (In a Box of 75)
units
ETD 54 B66395 61.6 x 46 x 61.4mm 22 GFR Polyterephthalate 61.4mm 61.6mm 46mm -