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. 167-0495
Mfr. Part No.B66422W1010D001
BrandEPCOS
SGD1.00
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. 167-8222
Mfr. Part No.B66362W1014T001
BrandEPCOS
SGD1.509
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
SGD3.40
Each
units
ETD 34 B66361G - 14 GFR Polyterephthalate - - - +180°C
RS Stock No. 647-9597
Mfr. Part No.B66422W1010D001
BrandEPCOS
SGD1.902
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. 125-3403
Mfr. Part No.B65820W1008D001
BrandEPCOS
SGD1.793
Each (In a Pack of 10)
units
Vertical Coil Former RM 7 Core - 8 GFR Thermosetting Plastic - - 14.65 (Dia.)mm +180°C
RS Stock No. 170-1455
Mfr. Part No.B65820W1008D001
BrandEPCOS
SGD1.078
Each (On a Reel of 250)
units
Vertical Coil Former RM 7 Core - 8 GFR Thermosetting Plastic - - 14.65 (Dia.)mm +180°C
RS Stock No. 167-8169
Mfr. Part No.B66243B1018T001
BrandEPCOS
SGD2.945
Each (In a Box of 60)
units
E 42/21/20 Coil Former B66329 35 x 50.9 x 28.2mm 18 GFR Polyterephthalate 50.9mm 40mm 37.2mm +155°C
RS Stock No. 125-3603
Mfr. Part No.B65888N1012D001
BrandEPCOS
SGD2.116
Each (In a Pack of 5)
units
Vertical Coil Former RM 14 Core - 12 GFR Thermosetting Plastic - - 28.8 (Dia.)mm +180°C
RS Stock No. 167-0150
Mfr. Part No.B66368B1020T001
BrandEPCOS
SGD2.352
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. 162-0179
Mfr. Part No.B66366B1018T001
BrandEPCOS
SGD1.49
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. 170-1506
Mfr. Part No.B66232J1112T001
BrandEPCOS
SGD1.286
Each (On a Reel of 425)
units
Vertical Coil Former E 30/15/7 Core - 12 GFR Polyterephthalate - 35.4mm 19.2mm +155°C
RS Stock No. 170-1393
Mfr. Part No.B65527B1008T001
BrandEPCOS
SGD0.771
Each (On a Reel of 1000)
units
SMD Coil Former ER 9.5/5 Core - 8 GFR Liquid Crystal Polymer - 7.6mm 8.2mm +155°C
RS Stock No. 167-8170
Mfr. Part No.B66362X1014T001
BrandEPCOS
SGD1.579
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. 653-1207
Mfr. Part No.B66368B1020T001
BrandEPCOS
SGD3.80
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. 212-9620
Mfr. Part No.B66243B1018T001
BrandEPCOS
SGD4.64
Each
units
E 42/21/20 Coil Former B66329 - 18 GFR Polyterephthalate 50.9mm - 37.2mm +155°C
RS Stock No. 213-4076
Mfr. Part No.B66366B1018T001
BrandEPCOS
SGD1.98
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. 167-8562
Mfr. Part No.B66242J1000R001
BrandEPCOS
SGD3.655
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. 167-8224
Mfr. Part No.B66362B1014T001
BrandEPCOS
SGD1.382
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. 212-9614
Mfr. Part No.B66242J1000R001
BrandEPCOS
SGD6.61
Each
units
E 42 B66325, B66329 29.2 x 35 x 37.5mm 8 - 37.5mm 29.2mm 35mm -
RS Stock No. 174-1588
Mfr. Part No.EFD15/8/5-3F3
BrandFERROXCUBE
SGD1.94
Each
units
EFD Core Ferrites 15 x4.65 x 7.5mm 8 GFR Phenolformaldehyde 7.5mm 15mm 4.65mm +180°C