Coil
Formers
Coil Formers
or Bobbins which are in use today are made of impregnated paper
materials, Laminated materials, Compression moulded types in
thermosetting materials, or injection moulded types in thermoplastic
resins.
Thermoplastic
accounts for a large part in the manufacture of bobbins for
ferrite cored transformers and small transformer with laminations.
The below table gives properties of the material suitable for
bobbins [Quote-IS: 11455 (Part1/Sec3)1985].
| Typical
Bobbin Materials |
| Sl.No. |
Temp.
Classification |
Bobbin
Materials |
| 1. |
Class
Y (90 0C) |
Polystyrene
E.H |
| 2. |
Class
A (105 0C) |
Kraft
paper, leatheroid, polypropylene, polyacetal, nylon. |
| 3. |
Class
E (120 0C) |
Paper
based laminates, Nylon66 |
| 4. |
Class
B (130 0C) |
Phenolic-bonded
asbestor Phenolic & melamine resin bonded glass
fabric, laminates, glass filled polycarbonate |
| 5. |
Class
F (155 0C) |
Epoxy
bonded glass fabric laminates, glass filled Nylon6 |
| 6. |
Class
H (180 0C) |
Silicon
bonded glass fabric laminates, glass filled Nylon66
& polyamide. Polyethylene terephthalate and polybutylene
terephthalate. |
|
Major
application areas of Coil formers are Inverter transformer,
Current transformer, Fly back transformer, Driver transformer,
Pulse transformer, Line filter choke, Noise suppressor, Beam
deflection systems etc.
Power
Inlet Sockets (
Please
Click here to view details )
Three Pin
Power inlet sockets of 250V, 10Amps Capacity are available in
UL and non UL approved plastic materials. The terminals are
made of solid brass, coates with copper flash and tin plated
as per our standard (PRDN/WI/11).
Terminals
We can offer
Round or Square tags depending upon the products already developed.
The base materials of all the terminals are Phosphorous Bronze,
coated with copper flash and tin-plated as per our standard
(PRDN/W1/11).
| Preferred
to Solder :- |
| Type
of Soldering |
Soldering
Temp. |
Soldering
Time |
| Hand
Soldering |
Max.
200 0C |
2-3
seconds |
| Dip
Soldering |
Max.
410 0C |
2
seconds |
| Wave
Soldering |
Max.
480 0C |
2
seconds |
|
Note:
All
the bobbins conform to various customer specifications only
and are not our own design.
- Most
of the bobbins can be offered in both glass filled Nylon6,
Nylon66 and Polyester, both FR & Non FR grades as per
UL standard.
- Specifications
subject to change due to continuous development.
- Terminals
are plated for good solderability with copper flash and Tin
as per our standard. (PRDN/WI/11).
How to
Order:
No
component is available off the shelf. Requirements may be ordered
by an enquiry, followed by our quote. Supplies will be made
against a mutually agreed schedule. While enquiring, please
quote our part number followed by the component name. OR Component
name and Serial No.
Any specific
requirement can be developed on the basis of your specifications.
A drawing or sample will be required. To develop/quote/minimum
lead time required will be 3-6 weeks depending upon the type
of the component. We can also manufacture any other plastic
engineering components other than coil formers.