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. 647-9632
Mfr. Part No.B66424W1012D001
BrandEPCOS
MYR4.838
Each (In a Pack of 5)
units
EFD 30/15/9 Coil Former B66423 30 x 31 x 13mm 12 GFR Thermosetting Plastic 13mm 30mm 31mm +180°C
RS Stock No. 840-7276
Mfr. Part No.FS-2E-4215-10
BrandBlock
MYR20.08
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 170-7480
Mfr. Part No.FS-2E-4215-10
BrandBlock
MYR22.94
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 170-7490
Mfr. Part No.FS-2EFD-3009-30
BrandBlock
MYR22.77
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 840-7336
Mfr. Part No.FS-2EFD-3009-30
BrandBlock
MYR39.32
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 167-0164
Mfr. Part No.B66398W1024T001
BrandEPCOS
MYR8.06
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
MYR10.72
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. 212-6687
Mfr. Part No.B65816N1012D001
BrandEPCOS
MYR5.828
Each (In a Pack of 5)
units
RM 12 Coil Former B65815 - 12 GFR Thermosetting Plastic 18mm - - +180°C
RS Stock No. 167-8451
Mfr. Part No.B65816N1012D001
BrandEPCOS
MYR3.776
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. 174-1588
Mfr. Part No.EFD15/8/5-3F3
BrandFERROXCUBE
MYR6.20
Each
units
EFD Core Ferrites 15 x4.65 x 7.5mm 8 GFR Phenolformaldehyde 7.5mm 15mm 4.65mm +180°C
RS Stock No. 167-0150
Mfr. Part No.B66368B1020T001
BrandEPCOS
MYR6.927
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. 647-9496
Mfr. Part No.B66396W1022T001
BrandEPCOS
MYR11.94
Each
units
ETD 54 B66395 61.6 x 46 x 61.4mm 22 GFR Polyterephthalate 61.4mm 61.6mm 46mm -
RS Stock No. 647-9402
Mfr. Part No.B66362X1014T001
BrandEPCOS
MYR7.75
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. 167-8204
Mfr. Part No.B66396W1022T001
BrandEPCOS
MYR7.847
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 -
RS Stock No. 167-8170
Mfr. Part No.B66362X1014T001
BrandEPCOS
MYR4.91
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
MYR11.08
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. 167-0495
Mfr. Part No.B66422W1010D001
BrandEPCOS
MYR2.84
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. 125-3403
Mfr. Part No.B65820W1008D001
BrandEPCOS
MYR5.24
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. 125-3382
Mfr. Part No.B65808N1004D001
BrandEPCOS
MYR4.312
Each (In a Pack of 10)
units
Vertical Coil Former RM 6 Core - 4 GFR Thermosetting Plastic - - 7.45 (Dia.)mm +180°C
RS Stock No. 125-3613
Mfr. Part No.B66206W1110T001
BrandEPCOS
MYR5.15
Each (In a Pack of 10)
units
Vertical Coil Former E 20/10/6 Core - 10 GFR Polyterephthalate - 22mm 13.9mm +155°C
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