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. 840-7276
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. 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
MYR12.11
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. 167-0150
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. 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. 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. 167-8451
Mfr. Part No.B65816N1012D001
BrandEPCOS
MYR3.82
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. 647-9402
Mfr. Part No.B66362X1014T001
BrandEPCOS
MYR8.67
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. 212-6687
Mfr. Part No.B65816N1012D001
BrandEPCOS
MYR7.81
Each (In a Pack of 5)
units
RM 12 Coil Former B65815 - 12 GFR Thermosetting Plastic 18mm - - +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. 125-3355
Mfr. Part No.B65662B0000T001
BrandEPCOS
MYR1.163
Each (In a Pack of 50)
units
Vertical Coil Former P 22 x 13 Core - - GFR Polyterephthalate - - 17.8 (Dia.)mm +155°C
RS Stock No. 167-8478
Mfr. Part No.B65888C1512T001
BrandEPCOS
MYR4.99
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. 170-1385
Mfr. Part No.B65522B0000T001
BrandEPCOS
MYR0.71
Each (On a Reel of 500)
units
Vertical Coil Former P 9 x 5 Core - - GFR Polyterephthalate - - 7.4 (Dia.)mm +155°C
RS Stock No. 125-3383
Mfr. Part No.B65808N1006D001
BrandEPCOS
MYR4.17
Each (In a Pack of 10)
units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
RS Stock No. 167-8481
Mfr. Part No.B65816C1512T001
BrandEPCOS
MYR3.98
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
RS Stock No. 162-0190
Mfr. Part No.B65812C1512T001
BrandEPCOS
MYR3.21
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. 125-3601
Mfr. Part No.B65884E0012D001
BrandEPCOS
MYR8.10
Each (In a Pack of 5)
units
Vertical Coil Former PQ 40 x 40 Core - 12 PMC Thermosetting Plastic - 38.1mm 40mm -