Core Materials › Silicon Steel Cores
Toroidal Core
– Strip width: minimum 3mm – Inside diameter: minimum 5mm – Outside diameter: minimum 8mm, maximum 2000mm
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.
| Published data | – Strip width: minimum 3mm / – Inside diameter: minimum 5mm / – Outside diameter: minimum 8mm, maximum 2000mm / (1)Uncut, non-impregnated. / (2)Uncut, lightly impregnated with epoxy varnish. / (3)Cut, fully impregnated with epoxy resin. / (4)Multiple-cut, fully impregnated with epoxy resin. / (5)Assembled with plastic cases [PP, maximum working temperature 110ºC, thickness 0.4~0.8mm]. / (6)Green epoxy coating [maximum working temperature 180ºC, thickness 0.20~0.50mm]. / (7)Black epoxy painting. / High-quality CRGO steels with the characteristics of low iron-loss and high permeability in thickness of 0.05mm, 0.23mm, 0.27mm, and 0.3mm. / It is toroidal and wound in the same direction of closed flux path. No magnetic flux leakage. It has the best magnetic performance. It is easy and high-efficiency for coil winding with the toroidal winding machine. / The toroidal core is widely used in 50Hz and 400Hz transformers, current transformers, reactors, chokes, and other magnetic components of electronic equipment. |
|---|
Published Notes
- – Outside diameter: minimum 8mm, maximum 2000mm
- (1)Uncut, non-impregnated.
- (2)Uncut, lightly impregnated with epoxy varnish.
- (3)Cut, fully impregnated with epoxy resin.
- (4)Multiple-cut, fully impregnated with epoxy resin.
- (5)Assembled with plastic cases [PP, maximum working temperature 110ºC, thickness 0.4~0.8mm].
- (6)Green epoxy coating [maximum working temperature 180ºC, thickness 0.20~0.50mm].
- (7)Black epoxy painting.
- High-quality CRGO steels with the characteristics of low iron-loss and high permeability in thickness of 0.05mm, 0.23mm, 0.27mm, and 0.3mm.
- It is toroidal and wound in the same direction of closed flux path. No magnetic flux leakage. It has the best magnetic performance. It is easy and high-efficiency for coil winding with the toroidal winding machine.
- The toroidal core is widely used in 50Hz and 400Hz transformers, current transformers, reactors, chokes, and other magnetic components of electronic equipment.
Product Overview
– Strip width: minimum 3mm – Inside diameter: minimum 5mm – Outside diameter: minimum 8mm, maximum 2000mm
It belongs to the silicon steel cores range, which holds 8 published part numbers. Tape wound cores in silicon steel, amorphous and nanocrystalline alloy, in toroidal, C core and cut core shapes.
Materials
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.
Part of a 8 item Silicon Steel Cores 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.
Where This Part Is Used
Application pages that cover this kind of component.
Related Reading
Selection and material notes from the knowledge center.
Questions Buyers Ask About This Part
What is the pin pitch and row spacing
The pin geometry for this part is on the drawing rather than in the published summary. Ask for the drawing and it will be sent as a PDF.
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.