EF Bobbins
EF bobbins for the taller narrower EF core family used where board area matters more than height.
What This Series Covers
EF bobbins for the taller narrower EF core family used where board area matters more than height. There are 41 published part numbers, and every one lists the plastic, the pin count and the pin geometry where the drawing states them.
If a geometry in this series is close but not exact, the tool room can modify pin counts, section splits and mounting features on a new tool rather than forcing a redesign around a stock part.
Materials Used In This Series
Counted from the published data for these 41 parts.
| Phenolic | 18 parts |
|---|---|
| PET | 11 parts |
| PET/GFN | 5 parts |
| Phenolic-PM9630 | 2 parts |
| LCP | 2 parts |
| Plastic | 1 parts |
| GFN | 1 parts |
| PBT | 1 parts |
All Parts In This Series
EF12 Horizontal bobbin with 2 sections4+4 pinsPhenolicP 3.30mm
EF12.6 Horizontal bobbin with 7 Pins4+3 pinsPhenolicP 3.82/5.1/3.3mm
EF12.6 Vertical bobbin with 2 sections3+3 pinsPETP 3.8mm
EF16 Horizontal bobbin with 14 Pins7+7 pinsPhenolicP 2.50mm
EF16 Horizontal bobbin with 2 section 12 pins6+6 pinsPETP 2.5mm
EF16 Horizontal bobbin with 2 sections 14 pins7+7 pinsPhenolicP 2.5mm
EF16 Horizontal bobbin with 4 sections7+7 pinsPhenolicP 2.50mm
EF16 Horizontal bobbin with 7 Pins5+2 pinsPhenolicP 2.50mm/10.00mm
EF16 Horizontal bobbin with 8 Pins4+4 pinsPETP 3.81mm
EF16 Vertical bobbin with 2 sections3+3 pinsPETP 3.75mm
EF16 Vertical bobbin with 3 sections3+3 pinsPET
EF16 Vertical bobbin with 4 sections3+3 pinsPETP 3.75mm
EF16 Vertical bobbin with 6 Pins3+3 pinsPETP 3.75mm
EF16 Vertical bobbin with 6 Pins3+3 pinsPlasticP 3.80mm
EF16 Vertical bobbin with 8 Pins4+4 pinsPETP 3.80mm
EF20 Horizontal bobbin with 10 Pins5+5 pinsPhenolicP 3.8mm
EF20 Horizontal bobbin with 2 sections4+4 pinsPET/GFNP 5.00mm
EF20 Horizontal bobbin with 2 sections5+5 pinsPhenolicP 3.81mm
EF20 Horizontal bobbin with 3 sections4+4 pinsPhenolicP 5.0mm
EF20 Horizontal bobbin with 4 sections4+4 pinsPET/GFNP 5.0mm
EF20 Horizontal bobbin with 4 sections 4 pins2+2 pinsGFNP 11.00mm
EF20 Horizontal bobbin with 6 Pins4+2 pinsPhenolicP 5.0mm
EF20 Horizontal bobbin with 8 Pins4+4 pinsPhenolicP 5.0mm/4.00mm
EF20 Vertical bobbin with 10 Pins5+5 pinsPhenolicP 3.8mm
EF20 Vertical bobbin with 2 sections3+3 pinsPET/GFNP 5.08mm
EF20 Vertical bobbin with 2 sections4+4 pinsPETP 5.08mm
EF20 Vertical Bobbin with 4 sections3+3 pinsPET/GFNP 5.08mm
EF20 Vertical bobbin with 6 Pins3+3 pinsPETP 5.08mm
EF25 Horizontal bobbin with 10 Pins5+5 pinsPhenolicP 5.0mm
EF25 Horizontal bobbin with 12 Pins6+6 pinsPETP 5.0mm
EF25 Horizontal bobbin with 2 sections4+4 pinsPhenolicP 5.0mm
EF25 Horizontal bobbin with 4 sections4+4 pinsPET/GFNP 5.0mm
EF25 Horizontal bobbin with 8 Pins4+4 pinsPhenolicP 5.0mm
EF25 Horizontal Bobbin with 9 Pins5+4 pinsPhenolicP 5.0mm
EF25 Vertical bobbin5+5 pinsPhenolicP 5.08mm
EF28 Bobbin， 2 Sections5+5 pinsPhenolicP 3.70mm
ER28 Horizontal bobbin with 4 sections3+3 pinsPBTP 8.7mm
SMD EF12.6 2 sections Bobbin with 10 gull-wing Pins5+5 pinsPhenolic-PM9630
SMD EF12.6 2 sections Bobbin with 10 Type-C Pins5+5 pinsLCP
SMD EF12.6 BOBBIN WITH 10 GULL-WING PINS5+5 pinsPhenolic-PM9630
SMD EF12.6 Bobbin with 10 pins5+5 pinsLCPSelection Table
Every published part in this series with its geometry side by side.
Questions About EF Bobbins
How many ef bobbins are published
41 part numbers, listed above with material and pin geometry.
What if my size is not in the list
Send the drawing. Tool design and injection moulding are in-house services, so a size that is not in the catalogue is quoted as a tooling job rather than turned away.
Which plastics are used in this series
Phenolic, PET, Plastic, PET/GFN, GFN, PBT.
Can you supply the matching core
Yes. Silicon steel amorphous and nanocrystalline cores are in the same catalogue and complete wound components can be quoted.
Do you provide drawings and CAD
Dimensioned drawings are sent as PDF on request. CAD files are released on request via WhatsApp or email rather than as an open download.
Send Your Part List
Catalogue parts are quoted from existing tooling. Anything outside the list is quoted from your drawing.