Manufacture of custom inductive components: winding, selective soldering, vacuum casting, impregnation and 100% piece testing
Witema Elektronik GmbH
MarkranstädtNew on Amplifa
About Witema Elektronik GmbH
For more than 30 years, Witema Elektronik GmbH has manufactured custom inductive components such as coils, transformers and toroidal core windings at its Markranstädt site. The service portfolio includes development and technical consulting on winding structure and basic components, winding on modern winding machines (two-wire and turret technology) as well as toroidal core winding technology, selective soldering under protective atmosphere, vacuum casting, vacuum impregnation, product marking by inkjet printing and taping of SMD components. Before delivery, every component undergoes 100% piece testing of the parameters inductance, turns ratio, polarity and dielectric strength. Raw materials used are enameled copper wire as well as core materials from suppliers such as TDK, Elektrisola and Tridelta. Customers include companies from telecommunications, power supply and drive technology, control and signal technology, automotive engineering, lighting technology as well as medical technology, including Siemens, Puls, Still and TURCK. On approx. 3,000 m² of production, office and warehouse space, the company employs 80 staff and manufactures smallest, small, medium and large series.
- Site
- Markranstädt
- Processes
- Coil winding/winding of inductive components (automated winding, two-wire and turret technology,, Selective soldering (soldering systems using selective soldering under protective atmosphere), Vacuum casting, Impregnation (vacuum impregnation), Piece testing/final testing (inductance, turns ratio, polarity, dielectric strength/Hi-Pot,, Product marking (inkjet printing: manufacturer, date code, part number), Taping of SMD components, Development/technical consulting for inductive components (basic components, winding structure)
- Materials
- Enameled copper wire (raw material for winding technology), Ferrite/core materials for inductive components, Enameled copper wire, Core materials (e.g. TDK, Tridelta), Vacuum casting (resin and hardener), Selective soldering under protective atmosphere, Impregnation
- Certificates
- DIN EN ISO 9001:2015, UL-Recognized Insulation System UL2-200, UL-Recognized Insulation System UL3-130, UL-Recognized Insulation System UL4-155, ISO 9001, UL-Recognized Insulation Systems, REACH compliance, Conflict minerals declaration
- Employees
- 80
- Industries
- Telecommunications, Power supply technology, Drive technology, Control and signal technology, Automotive engineering, Lighting technology
- 01
Development/technical consulting for inductive components
- 02
Winding (winding machines, toroidal core winding technology)
- 03
Selective soldering
- 04
Vacuum casting and impregnation
- 05
Product marking (inkjet)
- 06
100% piece testing/final testing
- 07
Taping of SMD components
- 08
Logistics agreements, consignment and safety stock
Raw materials and manufacturing processes
Enameled copper wire
Raw material for winding coils and windings, sourced from long-standing main suppliers such as Elektrisola.
Core materials (e.g. TDK, Tridelta)
Core materials for inductive components according to custom design.
Vacuum casting (resin and hardener)
Casting material for electrical insulation and mechanical stabilization, processed in a vacuum casting system.
Selective soldering under protective atmosphere
Process for soldering component connections using a soldering system from LJU.
Impregnation
Vacuum impregnation for impregnating the windings.
Site Markranstädt
Markranstädt
DEMain site: production, office, warehouse
- Lot size
- Smallest, small, medium and large series
- Materials
- Enameled copper wire, core materials, casting resin
- Marsilli winding machine, 8-spindle with two-wire technology and loading shuttle
- PRA620A winding machine, 6-spindle with turret technology
- Ruff toroidal core winding machine with 3 winding tables and winding heads
- Hübers vacuum casting system (preparation of resin and hardener, casting chamber under vacuum)
- LJU selective soldering system with loading beam
- KBA-Metronic inkjet printer for product marking
- HP test equipment
- Computer-controlled Voltech measuring bridges
Inductive components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Coil winding/winding of inductive components (automated winding, two-wire and turret technology,Joining | – | – | – | Smallest series – Large series | Enameled copper wire, Core materials (e.g. from TDK, Tridelta) |
| Selective soldering (soldering systems using selective soldering under protective atmosphere)Joining | – | – | – | – | – |
| Vacuum castingPlastics | – | – | – | – | Casting resin/resin and hardener |
| Impregnation (vacuum impregnation)Surface | – | – | – | – | – |
| Piece testing/final testing (inductance, turns ratio, polarity, dielectric strength/Hi-Pot,Testing | – | – | – | – | – |
| Product marking (inkjet printing: manufacturer, date code, part number)Surface | – | – | – | – | – |
| Taping of SMD componentsAssembly | – | – | – | – | – |
| Development/technical consulting for inductive components (basic components, winding structure)Engineering | – | – | – | – | – |
8 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Winding machine | Marsilli | 1 | 8-spindle with two-wire technology and loading shuttle | – | Markranstädt |
| Winding machine | PRA PRA620A | 1 | 6-spindle with turret technology | – | Markranstädt |
| Toroidal core winding machine | Ruff | 1 | 3 winding tables and winding heads | – | Markranstädt |
| Vacuum casting system | Hübers | 1 | Preparation of resin and hardener, casting chamber under vacuum | – | Markranstädt |
| Selective soldering system | LJU | 1 | with loading beam | – | Markranstädt |
| Inkjet printer for product marking | KBA-Metronic | 1 | – | – | Markranstädt |
| Computer-controlled measuring bridges (test equipment) | Voltech | – | – | – | Markranstädt |
| Test equipment (piece testing of inductive parameters) | HP | – | – | – | Markranstädt |
Additional services
Reference customers
Quality and certification
Before delivery, every component undergoes 100% piece testing of the prescribed parameters such as inductance, turns ratio, polarity and dielectric strength; for this purpose, test equipment from HP and computer-controlled measuring bridges from Voltech are available. The company is certified to DIN EN ISO 9001:2015 and has UL-recognized insulation systems.
| Evidence | Markranstädt |
|---|---|
| ISO 9001 | |
| UL-Recognized Insulation Systems | |
| REACH compliance | |
| Conflict minerals declaration |
History
Company founded with first site at Leipziger Straße 4, initially 4 employees
Relocation to the current site at An der Schachtbahn 18 in Markranstädt
- 1998
Commissioning of production area 1 on the upper floor
- 2006
Production expansion: production area 2 on the lower floor
- 2008
UL recognition of the insulation system UL4-155 (E248952) by Underwriters Laboratories