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. 212-5101
Mfr. Part No.B65687A1018T001
BrandEPCOS
€8.54
Each
units
PM 74/59 Coil Former B65686 85.5 x 57.3 x 57.8mm 18 GFR Polyterephthalate 57.8mm 85.5mm 57.3mm +155°C
RS Stock No. 167-8580
Mfr. Part No.B65687A1018T001
BrandEPCOS
€6.903
Each (In a Box of 10)
units
PM 74/59 Coil Former B65686 85.5 x 57.3 x 57.8mm 18 GFR Polyterephthalate 57.8mm 85.5mm 57.3mm +155°C
RS Stock No. 212-6839
Mfr. Part No.B65888C1512T001
BrandEPCOS
€1.734
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. 167-8512
Mfr. Part No.B65814C1512T001
BrandEPCOS
€0.80
Each (In a Box of 200)
units
RM 10 Coil Former B65813 33 x 23.3 x 18.75mm 12 GFR Polyterephthalate 18.75mm 33mm 23.3mm +155°C
RS Stock No. 647-9238
Mfr. Part No.B65814C1512T001
BrandEPCOS
€1.45
Each (In a Pack of 5)
units
RM 10 Coil Former B65813 33 x 23.3 x 18.75mm 12 GFR Polyterephthalate 18.75mm 33mm 23.3mm +155°C
RS Stock No. 170-7480
Mfr. Part No.FS-2E-4215-10
BrandBlock
€1.596
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 167-8222
Mfr. Part No.B66362W1014T001
BrandEPCOS
€0.979
Each (In a Box of 100)
units
ETD 34 B66361G 39.6 x 33.1 x 41.6mm 14 GFR Polyterephthalate 44mm 39.6mm 27mm +180°C
RS Stock No. 167-8478
Mfr. Part No.B65888C1512T001
BrandEPCOS
€1.074
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. 212-9620
Mfr. Part No.B66243B1018T001
BrandEPCOS
€1.19
Each
units
E 42/21/20 Coil Former B66329 - 18 GFR Polyterephthalate 50.9mm - 37.2mm +155°C
RS Stock No. 213-3922
Mfr. Part No.B66362W1014T001
BrandEPCOS
€1.77
Each
units
ETD 34 B66361G - 14 GFR Polyterephthalate - - - +180°C
RS Stock No. 840-7276
Mfr. Part No.FS-2E-4215-10
BrandBlock
€1.56
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 167-8169
Mfr. Part No.B66243B1018T001
BrandEPCOS
€1.168
Each (In a Box of 60)
units
E 42/21/20 Coil Former B66329 35 x 50.9 x 28.2mm 18 GFR Polyterephthalate 50.9mm 40mm 37.2mm +155°C
RS Stock No. 161-7777
Mfr. Part No.FS-2E-2507-20
BrandBlock
€1.35
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 170-1484
Mfr. Part No.B65884E0012D001
BrandEPCOS
€1.045
Each (On a Reel of 72)
units
Vertical Coil Former PQ 40 x 40 Core - 12 PMC Thermosetting Plastic - 38.1mm 40mm -
RS Stock No. 170-1494
Mfr. Part No.B66206B1110T001
BrandEPCOS
€0.725
Each (On a Reel of 735)
units
Horizontal Coil Former E 20/10/6 Core - 10 GFR Polyterephthalate - 22mm 21.2mm +155°C
RS Stock No. 125-3624
Mfr. Part No.B66252B0000M001
BrandEPCOS
€4.39
Each (In a Pack of 2)
units
E 55 - 37 x 44 x 35.4mm 14 GFR 6-Polyamide 44mm 37mm 35.4mm +155°C
RS Stock No. 647-9092
Mfr. Part No.B65685A1000T001
BrandEPCOS
€3.49
Each
units
PM 62/49 Coil Former B65684 75.5 x 48.5 x 48mm 16 GFR Polyterephthalate 48mm 75.5mm 48.5mm +155°C
RS Stock No. 170-1486
Mfr. Part No.B65888N1012D001
BrandEPCOS
€0.648
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. 125-3403
Mfr. Part No.B65820W1008D001
BrandEPCOS
€1.036
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. 170-1440
Mfr. Part No.B65812N1012D001
BrandEPCOS
€0.46
Each (On a Reel of 200)
units
Vertical Coil Former RM 8 Core - 12 GFR Thermosetting Plastic - - 16.9 (Dia.)mm +180°C
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