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. 167-8580
Mfr. Part No.B65687A1018T001
BrandEPCOS
€6.662
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. 212-5101
Mfr. Part No.B65687A1018T001
BrandEPCOS
€7.40
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. 167-8512
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. 170-7480
Mfr. Part No.FS-2E-4215-10
BrandBlock
€1.68
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
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. 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. 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. 840-7276
Mfr. Part No.FS-2E-4215-10
BrandBlock
€1.73
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
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. 212-9620
Mfr. Part No.B66243B1018T001
BrandEPCOS
€3.96
Each
units
E 42/21/20 Coil Former B66329 - 18 GFR Polyterephthalate 50.9mm - 37.2mm +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. 167-8169
Mfr. Part No.B66243B1018T001
BrandEPCOS
€1.933
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. 213-3922
Mfr. Part No.B66362W1014T001
BrandEPCOS
€1.77
Each
units
ETD 34 B66361G - 14 GFR Polyterephthalate - - - +180°C
RS Stock No. 170-1528
Mfr. Part No.B66306C1010T001
BrandEPCOS
€0.678
Each (On a Reel of 345)
units
SMD Coil Former E 13/7/4 Core - 10 GFR Liquid Crystal Polymer - 13mm 13mm +155°C
RS Stock No. 125-3351
Mfr. Part No.B65652B0000T001
BrandEPCOS
€0.207
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. 162-0190
Mfr. Part No.B65812C1512T001
BrandEPCOS
€0.644
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. 170-1404
Mfr. Part No.B65652B0000T001
BrandEPCOS
€0.118
Each (On a Reel of 500)
units
Vertical Coil Former P 18 x 11 Core - - GFR Polyterephthalate - - 14.8 (Dia.)mm +155°C
RS Stock No. 125-3422
Mfr. Part No.B65878E0012D001
BrandEPCOS
€0.834
Each (In a Pack of 10)
units
Vertical Coil Former PQ 26 x 20 Core - 12 GFR Thermosetting Plastic - 26.5mm 29.3mm +180°C
RS Stock No. 170-1399
Mfr. Part No.B65612B0000T001
BrandEPCOS
€0.601
Each (On a Reel of 50)
units
Vertical Coil Former P 36 x 22 Core - - GFR Polyterephthalate - - 11.5 (Dia.)mm +155°C
RS Stock No. 170-1434
Mfr. Part No.B65808N1006D001
BrandEPCOS
€0.551
Each (On a Reel of 500)
units
Vertical Coil Former RM 6 Core - 6 GFR Thermosetting Plastic - - 12.3 (Dia.)mm +180°C
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EPCOS E13/7/4 Coil formers made from polyterethalate UL ...
Description:
EPCOS E13/7/4 Coil formers made from polyterethalate UL 94 V-0 Insulation class to IEC60085Maximum operating temperature 155°C solderability to IEC 60068-2-58 The SMD coil former with gullwing terminals is made from GFR liquid crystal polymer.
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 ER9 5/5 Coil former with gullwing terminals, ...
Description:
EPCOS ER9 5/5 Coil former with gullwing terminals, made from GFR liquid crystal polymer UL 94 V-0 insulation class to IEC 60085 Maximum operating temperature 155°C. Solderability to 60068-2-58.
EPCOS N65848 EP20 horizontal coil former is made ...
Description:
EPCOS N65848 EP20 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.