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. 647-9193
Mfr. Part No.B65812C1512T001
BrandEPCOS
HK$14.29
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
HK$6.834
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. 170-1426
Mfr. Part No.B65806N1106D001
BrandEPCOS
HK$5.208
Each (On a Reel of 500)
units
Vertical Coil Former RM 5 Core - 6 GFR Thermosetting Plastic - - 10.1 (Dia.)mm +155°C
RS Stock No. 212-9614
Mfr. Part No.B66242J1000R001
BrandEPCOS
HK$43.02
Each
units
E 42 B66325, B66329 29.2 x 35 x 37.5mm 8 - 37.5mm 29.2mm 35mm -
RS Stock No. 170-1479
Mfr. Part No.B65880E2012D001
BrandEPCOS
HK$7.396
Each (On a Reel of 112)
units
Vertical Coil Former PQ 32 x 30 Core - 12 GFR Thermosetting Plastic - 33mm 34.4mm +180°C
RS Stock No. 170-1440
Mfr. Part No.B65812N1012D001
BrandEPCOS
HK$7.254
Each (On a Reel of 200)
units
Vertical Coil Former RM 8 Core - 12 GFR Thermosetting Plastic - - 16.9 (Dia.)mm +180°C
RS Stock No. 170-1385
Mfr. Part No.B65522B0000T001
BrandEPCOS
HK$1.201
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. 125-3616
Mfr. Part No.B66208W1010T001
BrandEPCOS
HK$9.524
Each (In a Pack of 10)
units
Vertical Coil Former E 25/13/7 Core - 10 GFR Polyterephthalate - 27.5mm 17.3mm +155°C
RS Stock No. 167-8481
Mfr. Part No.B65816C1512T001
BrandEPCOS
HK$7.12
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. 167-8478
Mfr. Part No.B65888C1512T001
BrandEPCOS
HK$10.868
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. 125-3366
Mfr. Part No.B65734B1000T001
BrandEPCOS
HK$114.41
Each
units
Vertical Coil Former PM 114 x 93 Core - - Polyphenylene Sulphide - - 87 (Dia.)mm +155°C
RS Stock No. 162-0179
Mfr. Part No.B66366B1018T001
BrandEPCOS
HK$9.524
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. 212-9620
Mfr. Part No.B66243B1018T001
BrandEPCOS
HK$29.09
Each
units
E 42/21/20 Coil Former B66329 - 18 GFR Polyterephthalate 50.9mm - 37.2mm +155°C
RS Stock No. 170-1463
Mfr. Part No.B65844W1010D001
BrandEPCOS
HK$5.023
Each (On a Reel of 500)
units
Horizontal Coil Former EP/EPO 13 Core - 10 GFR Thermosetting Plastic - 15.9mm 14.8mm +180°C
RS Stock No. 167-0500
Mfr. Part No.B66418W1008D001
BrandEPCOS
HK$5.922
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. 170-1395
Mfr. Part No.B65542B0000T001
BrandEPCOS
HK$1.043
Each (On a Reel of 1000)
units
Vertical Coil Former P 14 x 8 Core - - GFR Polyterephthalate - - 7.1 (Dia.)mm +155°C
RS Stock No. 647-9553
Mfr. Part No.B66418W1008D001
BrandEPCOS
HK$12.028
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. 213-4076
Mfr. Part No.B66366B1018T001
BrandEPCOS
HK$14.55
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. 170-1556
Mfr. Part No.B66359X1014T001
BrandEPCOS
HK$8.319
Each (On a Reel of 100)
units
Vertical Coil Former ETD 29/16/10 Core - 14 GFR Polyterephthalate - - 35.2 (Dia.)mm +180°C
RS Stock No. 125-3607
Mfr. Part No.B65982E0012D001
BrandEPCOS
HK$24.012
Each (In a Pack of 5)
units
Vertical Coil Former PQ 50 x 50 Core - 12 PMC Thermosetting Plastic - 45.72mm 51mm -