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. 647-9402
Mfr. Part No.B66362X1014T001
BrandEPCOS
$3.11
Each
units
ETD 34/17/11 Coil Former B66361 39.6 x 27 x 44mm 14 GFR Polyterephthalate 44mm 39.6mm 27mm +180°C
RS Stock No. 167-8170
Mfr. Part No.B66362X1014T001
BrandEPCOS
$2.407
Each (In a Box of 100)
units
ETD 34/17/11 Coil Former B66361 39.6 x 27 x 44mm 14 GFR Polyterephthalate 44mm 39.6mm 27mm +180°C
RS Stock No. 125-3682
Mfr. Part No.B66372A2000T001
BrandEPCOS
$12.57
Each
units
Horizontal Coil Former E 70/33/32 Core - - Polyphenylene Sulphide - 46.5mm 89mm +155°C
RS Stock No. 167-8498
Mfr. Part No.B65808E1508T001
BrandEPCOS
$1.577
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. 170-1569
Mfr. Part No.B66372A2000T001
BrandEPCOS
$11.211
Each (On a Reel of 30)
units
Horizontal Coil Former E 70/33/32 Core - - Polyphenylene Sulphide - 46.5mm 89mm +155°C
RS Stock No. 647-9143
Mfr. Part No.B65808E1508T001
BrandEPCOS
$1.976
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. 167-0150
Mfr. Part No.B66368B1020T001
BrandEPCOS
$3.458
Each (In a Box of 60)
units
ETD 49/25/16 Coil Former B66367 48.5 x 24.9 x 16.7mm 20 GFR Polyterephthalate 16.7mm 48.5mm 24.9mm -
RS Stock No. 167-8478
Mfr. Part No.B65888C1512T001
BrandEPCOS
$2.588
Each (In a Box of 60)
units
RM 14 Coil Former B65887 41 x 31.4 x 29.3mm 12 GFR Polyterephthalate 29.3mm 41mm 31.4mm +155°C
RS Stock No. 483-3595
Mfr. Part No.B66362B1014T001
BrandEPCOS
$2.774
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. 212-6839
Mfr. Part No.B65888C1512T001
BrandEPCOS
$2.246
Each (In a Pack of 5)
units
RM 14 Coil Former B65887 41 x 31.4 x 29.3mm 12 GFR Polyterephthalate 29.3mm 41mm 31.4mm +155°C
RS Stock No. 653-1207
Mfr. Part No.B66368B1020T001
BrandEPCOS
$3.86
Each
units
ETD 49/25/16 Coil Former B66367 48.5 x 24.9 x 16.7mm 20 GFR Polyterephthalate 16.7mm 48.5mm 24.9mm -
RS Stock No. 167-8224
Mfr. Part No.B66362B1014T001
BrandEPCOS
$2.222
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. 167-8222
Mfr. Part No.B66362W1014T001
BrandEPCOS
$2.484
Each (In a Box of 100)
units
ETD 34 B66361G 39.6 x 33.1 x 41.6mm 14 GFR Polyterephthalate 44mm 39.6mm 27mm +180°C
RS Stock No. 213-3922
Mfr. Part No.B66362W1014T001
BrandEPCOS
$3.15
Each
units
ETD 34 B66361G - 14 GFR Polyterephthalate - - - +180°C
RS Stock No. 647-9525
Mfr. Part No.B66398W1024T001
BrandEPCOS
$5.51
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. 167-0495
Mfr. Part No.B66422W1010D001
BrandEPCOS
$1.599
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. 125-3415
Mfr. Part No.B65844W1010D001
BrandEPCOS
$1.033
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. 647-9597
Mfr. Part No.B66422W1010D001
BrandEPCOS
$1.812
Each (In a Pack of 5)
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. 167-0164
Mfr. Part No.B66398W1024T001
BrandEPCOS
$4.468
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. 167-8481
Mfr. Part No.B65816C1512T001
BrandEPCOS
$2.084
Each (In a Box of 100)
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