Customized chokes and transformers

At Kohsel, we use the latest production technology to design high-quality transformers and chokes. Our quality management system ensures the highest possible quality for the finished products.
Technical testing of the final products is done in numerous ways to ensure that the quality of the final item produced matches the standard of the specific drawing made by our engineers.

Transformer for assembling in enclosure

Standard EI96 transformer for mounting in enclosure.
Varnished under vacuum.
Painted with tropical varnish.

Transformer for PCB

Standard UI48/26 transformer for PCB.
Vacuum potted.

Transformer for PCB

Standard UI48/17 transformer for PCB.
Vacuum potted.

Current-measurement transformer

To improve the frequency range, the core is based on grain-oriented silicon steel combined with nickel.

Standard EI transformer for PCB

UL approved according to 5085
Vacuum potted

3-phase AC Choke

For a frequency converter using silicon steel.
Custom-made bracket and assembly.

Choke for LED Driver

Using an RM10 ferrite core
Wound with high-frequency (HF) litz wire and triple-isolated wire (TIW)

Triple transformer

Consists of one power and two signal transformers
Vacuum potted into a custom-made housing made of UL-V0 material

RFI Choke

Using two nanocrystalline toroid cores

Common-mode Choke

Using a nanocrystalline toroid core

Flyback transformer

Using an ETD29 ferrite core
Wound with triple-insulated wire (TIW)

PFC Choke for AC Drive

Using a PQ ferrite core.
Wound with copper foil.

3-phase RFI Choke

On a custom-made socket, using a nanocrystalline R45 toroid core.

Interference suppression coil

With a custom-made socket, using a toroid ferrite core.

Transformer for an LLC Resonant converter

Using an ETD49 ferrite core
Wound with high-frequency (HF) litz wire in two chambers

PFC Choke for AC Drive

Using a gapped steel laminated C-Core
Wound with copper foil

Chokes & Transformers

Transformer for assembling in enclosure

Standard EI96 transformer for mounting in enclosure.
Varnished under vacuum.
Painted with tropical varnish.

Transformer for PCB

Standard UI48/26 transformer for PCB.
Vacuum potted.

Transformer for PCB

Standard UI48/17 transformer for PCB.
Vacuum potted.

Current-measurement transformer

To improve the frequency range, the core is based on grain-oriented silicon steel combined with nickel.

Standard EI transformer for PCB

UL approved according to 5085
Vacuum potted

3-phase AC Choke

For a frequency converter using silicon steel.
Custom-made bracket and assembly.

Ferrite Chokes & Transformers

Choke for LED Driver

Using an RM10 ferrite core
Wound with high-frequency (HF) litz wire and triple-isolated wire (TIW)

Triple transformer

Consists of one power and two signal transformers
Vacuum potted into a custom-made housing made of UL-V0 material

RFI Choke

Using two nanocrystalline toroid cores

Common-mode Choke

Using a nanocrystalline toroid core

Flyback transformer

Using an ETD29 ferrite core
Wound with triple-insulated wire (TIW)

PFC Choke for AC Drive

Using a PQ ferrite core.
Wound with copper foil.

3-phase RFI Choke

On a custom-made socket, using a nanocrystalline R45 toroid core.

Interference suppression coil

With a custom-made socket, using a toroid ferrite core.

Transformer for an LLC Resonant converter

Using an ETD49 ferrite core
Wound with high-frequency (HF) litz wire in two chambers

PFC Choke for AC Drive

Using a gapped steel laminated C-Core
Wound with copper foil