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. 840-7308
Mfr. Part No.FS-2E-6527-20
BrandBlock
£3.15
Each
Units
E 65 FS-1E-6527-00 - 16 Rynite FR530(L) - - - -
RS Stock No. 174-1588
Mfr. Part No.EFD15/8/5-3F3
BrandFERROXCUBE
£1.00
Each
Units
EFD Core Ferrites 15 x4.65 x 7.5mm 8 GFR Phenolformaldehyde 7.5mm 15mm 4.65mm +180°C
RS Stock No. 647-9193
Mfr. Part No.B65812C1512T001
BrandEPCOS
£1.024
Each (In a Pack of 5)
Units
RM 8 Coil Former B65811 23.5 x 23.5 x 16.2mm 12 GFR Polyterephthalate 16.2mm 23.5mm 23.5mm +155°C
RS Stock No. 162-0190
Mfr. Part No.B65812C1512T001
BrandEPCOS
£0.567
Each (In a Box of 200)
Units
RM 8 Coil Former B65811 23.5 x 23.5 x 16.2mm 12 GFR Polyterephthalate 16.2mm 23.5mm 23.5mm +155°C
RS Stock No. 483-3595
Mfr. Part No.B66362B1014T001
BrandEPCOS
£1.408
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. 167-8224
Mfr. Part No.B66362B1014T001
BrandEPCOS
£0.775
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. 170-1404
Mfr. Part No.B65652B0000T001
BrandEPCOS
£0.10
Each (On a Reel of 500)
Units
Vertical Coil Former P 18 x 11 Core - - GFR Polyterephthalate - - 14.8 (Dia.)mm +155°C
RS Stock No. 125-3351
Mfr. Part No.B65652B0000T001
BrandEPCOS
£0.183
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. 167-0495
Mfr. Part No.B66422W1010D001
BrandEPCOS
£0.42
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. 647-9597
Mfr. Part No.B66422W1010D001
BrandEPCOS
£0.448
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. 647-9143
Mfr. Part No.B65808E1508T001
BrandEPCOS
£1.008
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. 167-8498
Mfr. Part No.B65808E1508T001
BrandEPCOS
£0.483
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. 167-8512
Mfr. Part No.B65814C1512T001
BrandEPCOS
£0.708
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. 647-9238
Mfr. Part No.B65814C1512T001
BrandEPCOS
£1.284
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. 167-0164
Mfr. Part No.B66398W1024T001
BrandEPCOS
£1.567
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. 167-0500
Mfr. Part No.B66418W1008D001
BrandEPCOS
£0.388
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. 167-8451
Mfr. Part No.B65816N1012D001
BrandEPCOS
£0.708
Each (In a Box of 100)
Units
RM 12 Coil Former B65815 33 x 33 x 18mm 12 GFR Thermosetting Plastic 18mm - 24.7mm +180°C
RS Stock No. 212-6687
Mfr. Part No.B65816N1012D001
BrandEPCOS
£1.284
Each (In a Pack of 5)
Units
RM 12 Coil Former B65815 - 12 GFR Thermosetting Plastic 18mm - - +180°C
RS Stock No. 647-9553
Mfr. Part No.B66418W1008D001
BrandEPCOS
£0.416
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. 647-9525
Mfr. Part No.B66398W1024T001
BrandEPCOS
£2.74
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
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