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ER28 Vertical bobbin with 26 Pins
ER28 Vertical bobbin
Have a drawing already? Send the PDF or DXF on WhatsApp or by email and it will be checked against an existing tool first.
Specifications
As published by CB Magnetics for this part number. Confirm against the current drawing before releasing tooling or a PCB.
| Pins | 13+13 |
|---|---|
| Material | Phenolic |
| Pin Distance | 2.5mm |
| Row Distance | 17.5mm |
Product Overview
ER28 Vertical bobbin
It belongs to the er bobbins range, which holds 45 published part numbers. A bobbin is the part that fixes everything else in a wound component: the number of turns you can fit, the creepage between primary and secondary, the pin pattern the PCB has to accept and the temperature the winding survives during soldering.
Materials
Moulded body: Phenolic. Read the material guide for how thermoset and thermoplastic bodies behave in soldering.
Why Engineers Specify This Part
Every point below is taken from the published data for this part number rather than from a general claim.
Body material is fixed and stated
Moulded in Phenolic. The plastic is on the part page so nobody has to guess what survives your reflow or wave profile.
Footprint can be drawn before samples arrive
Pin distance 2.5mm and row distance 17.5mm are published, so the PCB land pattern is not blocked waiting for a sample.
Part of a 45 item ER Bobbins range
Changing size later stays inside the same catalogue and the same tooling shop rather than becoming a new supplier search.
RoHS compliant
All products from CB Magnetics are RoHS compliant, which keeps the part usable in EU bound assemblies.
How It Is Made
Tool design, moulding, terminal insertion, assembly, electrical and dimensional test, then packing. The same route applies whether the part is a stock item or a new tool.
- Drawing review and tool design
- Steel cutting on the wire EDM and CNC machines in the tool room
- Injection moulding
- Terminal insertion and assembly
- Dimensional check in the measuring room
- Packing and shipping
Use Guide
Three checks before you commit a board layout or a winding programme to this part.
- Footprint. Match the published pin distance and row distance to your land pattern, then confirm both on the dimensioned drawing.
- Thermal. Check the stated plastic against your soldering profile. Thermoset bodies tolerate solder pot temperatures that melt many thermoplastics.
- Winding window. Confirm the section arrangement and the number of turns your wire gauge needs before ordering the tool or the first batch.
Comparison With Other Parts In This Range
Same series different geometry. Values are as published for each part.
| Part | Pins | Material | Pin Distance | Row Distance |
|---|---|---|---|---|
| ER28 Vertical bobbin with 26 Pins | 13+13 | Phenolic | 2.5mm | 17.5mm |
| ER11.5 Bobbin, Vertical , 6+6 Pins, L Lead | — | GFN; Pin Material: CP Wire | — | — |
| ER11.5 Bobbin, Vertical, 4+4 Pins, L Lead | — | GFN; Pin Material: CP Wire | — | — |
| ER11.5 Bobbin, Vertical, 5+5 Pins, L Lead | — | GFN; Pin Material: CP Wire | — | — |
| ER11.5 SMD Bobbin, 4+4 Pins | — | LCP E4008; Pin Material: Phos Bronze | — | — |
| ER11.5 SMD Bobbin, 5+5 Pins | — | Phenolic; Pin Material: Phos Bronze | — | — |
| ER14.5 SMD Bobbin, 5+5 Pins | — | Phenolic PM9630; Pin Material: Phos Bronze | — | — |
| ER14.5 SMD Bobbin, 6+6 Pins | — | LCP E4008; Pin Material: Phos Bronze | — | — |
Where This Part Is Used
Application pages that cover this kind of component.
Related Reading
Selection and material notes from the knowledge center.
Related Products
ER11.5 Bobbin, Vertical , 6+6 Pins, L Lead6+6 pinsGFN; Pin Material: CP Wir
ER11.5 Bobbin, Vertical, 4+4 Pins, L Lead4+4 pinsGFN; Pin Material: CP Wi
ER11.5 Bobbin, Vertical, 5+5 Pins, L Lead5+5 pinsGFN; Pin Material: CP Wir
ER11.5 SMD Bobbin, 4+4 Pins4+4 pinsLCP E4008; Pin Material: P
ER11.5 SMD Bobbin, 5+5 Pins5+5 pinsPhenolic; Pin Material: PQuestions Buyers Ask About This Part
What is ER28 Vertical bobbin with 26 Pins moulded in
Phenolic. If your process needs a different plastic the same geometry can be quoted in another material.
What is the pin pitch and row spacing
Pin distance 2.5mm and row distance 17.5mm.
Can I get a drawing or a 3D model
Yes. Dimensioned drawings are sent as PDF and CAD files are released on request rather than as an open download. Ask for CAD on WhatsApp.
Are the parts RoHS compliant
Yes. All products from CB Magnetics are RoHS compliant.
Can this part be modified
Custom tooling design and injection moulding is one of our standing services, so pin count section splits and mounting features can be changed on a new tool. See how the tooling service works.
How do I get a price and lead time
Send the part number and the annual quantity. Price and lead time are quoted per part and per quantity rather than published, because both move with the material and the pin count. Send the quantity on WhatsApp.
Send The Part Number And Quantity
Quotes go out against a part number and an annual volume. If you have a drawing instead of a part number send that and it will be checked against existing tooling first.