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
R 40.654
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
R 59.39
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. 125-3390
Mfr. Part No.B65812N1012D001
BrandEPCOS
R 28.71
Each (In a Pack of 5)
units
Vertical Coil Former RM 8 Core - 12 GFR Thermosetting Plastic - - 16.9 (Dia.)mm +180°C
RS stock no. 647-9238
Mfr. Part No.B65814C1512T001
BrandEPCOS
R 30.762
Each (In a Pack of 5)
units
RM 10 Coil Former B65813 33 x 23.3 x 18.75mm 12 GFR Polyterephthalate 18.75mm 33mm 23.3mm +155°C
RS stock no. 167-8512
Mfr. Part No.B65814C1512T001
BrandEPCOS
R 17.117
Each (In a Box of 200)
units
RM 10 Coil Former B65813 33 x 23.3 x 18.75mm 12 GFR Polyterephthalate 18.75mm 33mm 23.3mm +155°C
RS stock no. 170-1440
Mfr. Part No.B65812N1012D001
BrandEPCOS
R 18.293
Each (On a Reel of 200)
units
Vertical Coil Former RM 8 Core - 12 GFR Thermosetting Plastic - - 16.9 (Dia.)mm +180°C
RS stock no. 167-8224
Mfr. Part No.B66362B1014T001
BrandEPCOS
R 22.378
Each (In a Box of 100)
units
ETD 34/17/11 Coil Former B66361 39.6 x 41.8 x 33.1mm 14 GFR Polyterephthalate 33.1mm 39.6mm 41.8mm +155°C
RS stock no. 483-3595
Mfr. Part No.B66362B1014T001
BrandEPCOS
R 36.226
Each (In a Pack of 5)
units
ETD 34/17/11 Coil Former B66361 39.6 x 41.8 x 33.1mm 14 GFR Polyterephthalate 33.1mm 39.6mm 41.8mm +155°C
RS stock no. 125-3415
Mfr. Part No.B65844W1010D001
BrandEPCOS
R 16.216
Each (In a Pack of 10)
units
Horizontal Coil Former EP/EPO 13 Core - 10 GFR Thermosetting Plastic - 15.9mm 14.8mm +180°C
RS stock no. 170-1555
Mfr. Part No.B66359W1013T001
BrandEPCOS
R 16.699
Each (On a Reel of 100)
units
Horizontal Coil Former ETD 29/16/10 Core - 13 GFR Polyterephthalate - 35.3mm 35.2mm +155°C
RS stock no. 125-3337
Mfr. Part No.B65526B1010T001
BrandEPCOS
R 26.102
Each (In a Pack of 20)
units
SMD Coil Former ER 11/5 Core - 10 GFR Liquid Crystal Polymer - 8.6mm 10.5mm +155°C
RS stock no. 213-4076
Mfr. Part No.B66366B1018T001
BrandEPCOS
R 55.08
Each
units
ETD 44/22/15 Coil Former B66365 49.6 x 51 x 38.4mm 18 GFR Polyterephthalate 38.4mm 49.6mm 51mm +155°C
RS stock no. 125-3669
Mfr. Part No.B66359W1013T001
BrandEPCOS
R 27.949
Each (In a Pack of 10)
units
Horizontal Coil Former ETD 29/16/10 Core - 13 GFR Polyterephthalate - 35.3mm 35.2mm +155°C
RS stock no. 212-9614
Mfr. Part No.B66242J1000R001
BrandEPCOS
R 77.49
Each
units
E 42 B66325 29.2 x 35 x 37.5mm 8 - 37.5mm 29.2mm 35mm -
RS stock no. 170-1463
Mfr. Part No.B65844W1010D001
BrandEPCOS
R 13.883
Each (On a Reel of 500)
units
Horizontal Coil Former EP/EPO 13 Core - 10 GFR Thermosetting Plastic - 15.9mm 14.8mm +180°C
RS stock no. 162-0179
Mfr. Part No.B66366B1018T001
BrandEPCOS
R 28.237
Each (In a Box of 50)
units
ETD 44/22/15 Coil Former B66365 49.6 x 51 x 38.4mm 18 GFR Polyterephthalate 38.4mm 49.6mm 51mm +155°C
RS stock no. 167-8562
Mfr. Part No.B66242J1000R001
BrandEPCOS
R 45.938
Each (In a Box of 100)
units
E 42 B66325, B66329 29.2 x 35 x 37.5mm 8 - 37.5mm 29.2mm 35mm -
RS stock no. 125-3366
Mfr. Part No.B65734B1000T001
BrandEPCOS
R 241.56
Each
units
Vertical Coil Former PM 114 x 93 Core - - Polyphenylene Sulphide - - 87 (Dia.)mm +155°C
RS stock no. 170-1415
Mfr. Part No.B65734B1000T001
BrandEPCOS
R 163.625
Each (On a Reel of 2)
units
Vertical Coil Former PM 114 x 93 Core - - Polyphenylene Sulphide - - 87 (Dia.)mm +155°C
RS stock no. 170-1391
Mfr. Part No.B65526B1010T001
BrandEPCOS
R 13.183
Each (On a Reel of 1000)
units
SMD Coil Former ER 11/5 Core - 10 GFR Liquid Crystal Polymer - 8.6mm 10.5mm +155°C