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. 125-3603
Mfr. Part No.B65888N1012D001
BrandEPCOS
kr 13,978
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. 125-3382
Mfr. Part No.B65808N1004D001
BrandEPCOS
kr 9,661
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. 167-8451
Mfr. Part No.B65816N1012D001
BrandEPCOS
kr 8,051
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. 647-9553
Mfr. Part No.B66418W1008D001
BrandEPCOS
kr 4,296
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. 167-8481
Mfr. Part No.B65816C1512T001
BrandEPCOS
kr 8,43
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. 212-6687
Mfr. Part No.B65816N1012D001
BrandEPCOS
kr 14,596
Each (In a Pack of 5)
Units
RM 12 Coil Former B65815 - 12 GFR Thermosetting Plastic 18mm - - +180°C
RS Stock No. 212-6839
Mfr. Part No.B65888C1512T001
BrandEPCOS
kr 17,428
Each (In a Pack of 5)
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. 167-0500
Mfr. Part No.B66418W1008D001
BrandEPCOS
kr 4,196
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. 125-3383
Mfr. Part No.B65808N1006D001
BrandEPCOS
kr 9,94
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. 170-1433
Mfr. Part No.B65808N1004D001
BrandEPCOS
kr 5,399
Each (On a Reel of 500)
Units
Vertical Coil Former RM 6 Core - 4 GFR Thermosetting Plastic - - 7.45 (Dia.)mm +180°C
RS Stock No. 212-6722
Mfr. Part No.B65816C1512T001
BrandEPCOS
kr 15,054
Each (In a Pack of 5)
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. 170-1434
Mfr. Part No.B65808N1006D001
BrandEPCOS
kr 5,49
Each (On a Reel of 500)
Units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
RS Stock No. 167-8478
Mfr. Part No.B65888C1512T001
BrandEPCOS
kr 10,798
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. 170-1486
Mfr. Part No.B65888N1012D001
BrandEPCOS
kr 6,27
Each (On a Reel of 60)
Units
Vertical Coil Former RM 14 Core - 12 GFR Thermosetting Plastic - - 28.8 (Dia.)mm +180°C
RS Stock No. 170-1440
Mfr. Part No.B65812N1012D001
BrandEPCOS
kr 4,472
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. 170-1457
Mfr. Part No.B65822J1008T001
BrandEPCOS
kr 8,619
Each (On a Reel of 500)
Units
SMD Coil Former RM 5 Core - 8 GFR Liquid Crystal Polymer - 13.5mm 15mm +155°C
RS Stock No. 840-7285
Mfr. Part No.FS-2E-4215-20
BrandBlock
kr 15,37
Each
Units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 173-1176
Mfr. Part No.B65844S2000X000
BrandEPCOS
kr 7,482
Each (In a Bag of 500)
Units
Mounting Assembly Kit EP 13 Core - - Bronze (Clamp), Cold Rolled Steel (Yoke) - 15 (Clamp) mm, 16 (Yoke) mm 13 (Clamp) mm, 14 (Yoke) mm -
RS Stock No. 170-1393
Mfr. Part No.B65527B1008T001
BrandEPCOS
kr 4,641
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. 125-3616
Mfr. Part No.B66208W1010T001
BrandEPCOS
kr 3,72
Each (In a Pack of 10)
Units
Vertical Coil Former E 25/13/7 Core - 10 GFR Polyterephthalate - 27.5mm 17.3mm +155°C
Related Products
EPCOS B65820 RM7 coil former is made from ...
Description:
EPCOS B65820 RM7 coil former is made from GFR thermosetting plastic (UL 94 V-0, insulation class to IEC 60085). The Coil former has squared pins, solderability to IEC 60068-2. Maximum operating temperature is 155°C.
B66364 series ETD 39/20/13 coil formers from EPCOS ...
Description:
B66364 series ETD 39/20/13 coil formers from EPCOS are constructed from GFR polyterephthalate and are suitable for use with B66363 transformer ferrite cores. B66364 coil formers have 16 pins. They meet the UL 94 V-0 standard and have an insulation ...
EPCOS B65840 EP7 horizontal coil former is made ...
Description:
EPCOS B65840 EP7 horizontal coil former is made from GFR thermosetting plastic UL94 V-0 insulation class 60085. Maximum operating temperature 155°C. Solderability to IEC60068-2-20.This coil former has squared pins.
EPCOS B65844 EP13 coil formers which have square ...
Description:
EPCOS B65844 EP13 coil formers which have square pins. Made from GFR thermosetting plastic, UL94 V-0 Insulation class to IEC60085 . The coil formers have a maximum operating temperature of 180°C. Solderability to IECi60068-2-20.