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. 840-7266
Mfr. Part No.FS-2E-3007-20
BrandBlock
$3.66
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 840-7336
Mfr. Part No.FS-2EFD-3009-30
BrandBlock
$8.21
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 170-1564
Mfr. Part No.B66364W1016T001
BrandEPCOS
$1.695
Each (On a Reel of 100)
units
Vertical Coil Former ETD 39/20/13 Core - 16 GFR Polyterephthalate - 44.6mm 46.8mm +155°C
RS Stock No. 125-3385
Mfr. Part No.B65808N1006D002
BrandEPCOS
$1.489
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. 125-3382
Mfr. Part No.B65808N1004D001
BrandEPCOS
$1.489
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. 170-1506
Mfr. Part No.B66232J1112T001
BrandEPCOS
$1.331
Each (On a Reel of 425)
units
Vertical Coil Former E 30/15/7 Core - 12 GFR Polyterephthalate - 35.4mm 19.2mm +155°C
RS Stock No. 840-7285
Mfr. Part No.FS-2E-4215-20
BrandBlock
$8.01
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 162-0179
Mfr. Part No.B66366B1018T001
BrandEPCOS
$1.581
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. 170-1486
Mfr. Part No.B65888N1012D001
BrandEPCOS
$1.60
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. 125-3414
Mfr. Part No.B65844S2000X000
BrandEPCOS
$2.052
Each (In a Pack of 10)
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. 125-3624
Mfr. Part No.B66252B0000M001
BrandEPCOS
$6.295
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. 170-7496
Mfr. Part No.FS-2ETD-5922-20
BrandBlock
$7.424
Each (In a Bag of 5)
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 125-3609
Mfr. Part No.B66202B1108T001
BrandEPCOS
$1.613
Each (In a Pack of 10)
units
Horizontal Coil Former E 13/7/4 Core - 8 GFR Polyterephthalate - 14.2mm 16.2mm +155°C
RS Stock No. 840-7370
Mfr. Part No.FS-2ETD-5922-20
BrandBlock
$8.40
Each
units
Bobbin Choke Converter Topologies, Transmitter - - - - - - -
RS Stock No. 170-1444
Mfr. Part No.B65814N1012D001
BrandEPCOS
$1.349
Each (On a Reel of 200)
units
Vertical Coil Former RM 10 Core - 12 GFR Thermosetting Plastic - - 21 (Dia.)mm +180°C
RS Stock No. 173-1176
Mfr. Part No.B65844S2000X000
BrandEPCOS
$1.31
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. 170-1495
Mfr. Part No.B66206C1012T001
BrandEPCOS
$0.946
Each (On a Reel of 735)
units
Horizontal Coil Former E 20/10/6 Core - 12 GFR Polyterephthalate - 21.5mm 23.5mm +155°C
RS Stock No. 170-1434
Mfr. Part No.B65808N1006D001
BrandEPCOS
$0.939
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. 125-3601
Mfr. Part No.B65884E0012D001
BrandEPCOS
$2.646
Each (In a Pack of 5)
units
Vertical Coil Former PQ 40 x 40 Core - 12 PMC Thermosetting Plastic - 38.1mm 40mm -
RS Stock No. 125-3422
Mfr. Part No.B65878E0012D001
BrandEPCOS
$0.876
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
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EPCOS Coil former with gullwing terminals is made ...
Description:
EPCOS Coil former with gullwing terminals is made from GFR Liquid Crystal Polymer UL94 V-0 insulation class to 60085. Maximum operating temperature is 155°C. Solderability to IEC 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.
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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 ...