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. 170-1582
Mfr. Part No.B66414B6008T001
BrandEPCOS
SGD1.146
Each (On a Reel of 960)
units
SMD Coil Former EFD 15/8/5 Core - 8 GFR Liquid Crystal Polymer - 15mm 16mm +155°C
RS Stock No. 125-3366
Mfr. Part No.B65734B1000T001
BrandEPCOS
SGD18.79
Each
units
Vertical Coil Former PM 114 x 93 Core - - Polyphenylene Sulphide - - 87 (Dia.)mm +155°C
RS Stock No. 170-1435
Mfr. Part No.B65808N1006D002
BrandEPCOS
SGD0.937
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. 125-3375
Mfr. Part No.B65806N1106D001
BrandEPCOS
SGD1.509
Each (In a Pack of 10)
units
Vertical Coil Former RM 5 Core - 6 GFR Thermosetting Plastic - - 10.1 (Dia.)mm +155°C
RS Stock No. 125-3596
Mfr. Part No.B65880E2012D001
BrandEPCOS
SGD2.178
Each (In a Pack of 5)
units
Vertical Coil Former PQ 32 x 30 Core - 12 GFR Thermosetting Plastic - 33mm 34.4mm +180°C
RS Stock No. 125-3351
Mfr. Part No.B65652B0000T001
BrandEPCOS
SGD0.344
Each (In a Pack of 50)
units
Vertical Coil Former P 18 x 11 Core - - GFR Polyterephthalate - - 14.8 (Dia.)mm +155°C
RS Stock No. 647-9143
Mfr. Part No.B65808E1508T001
BrandEPCOS
SGD2.018
Each (In a Pack of 5)
units
RM 6 Coil Former B65807 18.4 x 16 x 12.65mm 8 GFR Polyterephthalate 12.65mm 18.4mm 16mm +155°C
RS Stock No. 647-9525
Mfr. Part No.B66398W1024T001
BrandEPCOS
SGD4.38
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. 125-3408
Mfr. Part No.B65840B1006D001
BrandEPCOS
SGD1.147
Each (In a Pack of 10)
units
Horizontal Coil Former EP 7 Core - 6 GFR Thermosetting Plastic - 10.7mm 8.5mm +155°C
RS Stock No. 162-0190
Mfr. Part No.B65812C1512T001
BrandEPCOS
SGD1.156
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. 647-9193
Mfr. Part No.B65812C1512T001
BrandEPCOS
SGD2.098
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. 167-8498
Mfr. Part No.B65808E1508T001
BrandEPCOS
SGD1.00
Each (In a Box of 500)
units
RM 6 Coil Former B65807 18.4 x 16 x 12.65mm 8 GFR Polyterephthalate 12.65mm 18.4mm 16mm +155°C
RS Stock No. 170-1563
Mfr. Part No.B66364B1016T001
BrandEPCOS
SGD1.637
Each (On a Reel of 100)
units
Horizontal Coil Former ETD 39/20/13 Core - 16 GFR Polyterephthalate - 44.6mm 46.8mm +155°C
RS Stock No. 167-8204
Mfr. Part No.B66396W1022T001
BrandEPCOS
SGD2.849
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. 170-7491
Mfr. Part No.FS-2ETD-2910-10
BrandBlock
SGD4.348
Each (In a Bag of 5)
units
ETD 29 FS-2ETD-2910-00 - 14 T375J - - - -
RS Stock No. 170-7488
Mfr. Part No.FS-2EFD-2509-20
BrandBlock
SGD4.294
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 125-3383
Mfr. Part No.B65808N1006D001
BrandEPCOS
SGD1.509
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. 170-1498
Mfr. Part No.B66208B1110T001
BrandEPCOS
SGD0.923
Each (On a Reel of 450)
units
Horizontal Coil Former E 25/13/7 Core - 10 GFR Polyterephthalate - 27.5mm 28mm +155°C
RS Stock No. 167-0500
Mfr. Part No.B66418W1008D001
BrandEPCOS
SGD0.987
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. 170-1507
Mfr. Part No.B66252B0000M001
BrandEPCOS
SGD3.728
Each (On a Reel of 100)
units
E 55 - 37 x 44 x 35.4mm 14 GFR 6-Polyamide 44mm 37mm 35.4mm +155°C
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Description:
RM 14 coil formers from EPCOS are constructed from black GFR thermosetting plastic, which meets IEC 60085:H standards. The B65888C1512T001 version is suitable for power applications and has a GFR polyterephthalate construction meeting IEC60085:F. Both materials meet the UL94 V-0 ...
B66414W EFD 15/8/5 coil formers from EPCOS are ...
Description:
B66414W EFD 15/8/5 coil formers from EPCOS are constructed from GRF thermosetting plastic and feature 8 squared pins. They meet the UL 94 V-0 standard and have an insulation class of IEC 60085:H with a maximum operating temperature of +180°C. ...
FS-2E series size 55/28/21 ferrite transformer bobbins with ...
Description:
FS-2E series size 55/28/21 ferrite transformer bobbins with insulation according to class B and flammability to UL 94 V-0. These ferrite transformer bobbins are available as horizontal (stock number 840-7294) or vertical (stock number 840-7291) mount. Typical applications for these ...
FS-2E series size 65/32/27 ferrite transformer bobbin with ...
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FS-2E series size 65/32/27 ferrite transformer bobbin with insulation according to class B and flammability to UL 94 V-0. This ferrite transformer bobbins is horizontal mounting. Typical applications for this ferrite bobbin includes transformers and inductors in switch mode power ...