
Develops and manufactures inrush current limiters, soft starters, speed controllers and custom electronics for electric motors.
GEFI-Elektronik GmbH & Co. KG
Waldbröl, GermanyNew on Amplifa
About GEFI Elektronik
GEFI-Elektronik GmbH & Co. KG is a family-owned company based in Waldbröl in the Oberbergische Land region, specializing in electronics for electric motors. The company develops and manufactures inrush current limiters, soft starters, ballasts and speed controllers for electric motors, transformers, power supplies and electronic consumer devices. The product range includes, among others, the GEFISTART, MEB, MINI, TRR, ESB Profi, ESB RRT and GEFITRON II product families. In addition, GEFI offers custom electronic solutions such as EMC interference suppression modules and RC networks (snubbers), as well as consulting and application analysis. Development is carried out in accordance with VDE and IEC standards; manufacturing takes place at the Waldbröl site. Housings are made predominantly from splash-water-protected plastic or polycarbonate.
- Site
- Waldbröl
- Processes
- Soft starter / inrush current limiter (ballast GEFISTART 3500 W), Soft starter built-in module MEB, Soft starter built-in module MINI, Inrush current limiter TRR (resistor-relay technology), Ballast ESB Profi for electrical power tools, Ballast ESB RRT for transformers and electronic devices, Speed control GEFITRON II for AC motors, Custom electronics (special solutions)
- Materials
- Plastic, Polycarbonate
- Industries
- Electrical power tools and mechanical engineering, Transformers and power supplies, Computer systems/switching power supplies, Electronic consumer devices
- 01
Application analysis (load, mains, environment)
- 02
Product selection or custom design
- 03
Electronics development according to VDE/IEC standards
- 04
Validation (data sheet, standards, practice)
- 05
Manufacturing in Waldbröl
Materials & Processes
Polycarbonate
Housing material for DIN rail modules (TRR V2, DIN 43880, UL94 V-0).
Plastic
Splash-water-protected housings and encapsulated versions for ballasts and built-in modules.
Locations

Waldbröl
DEDevelopment, Manufacturing, Administration
- Materials
- Plastic, Polycarbonate
Products & Components







Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Soft starter / inrush current limiter (ballast GEFISTART 3500 W)Electronics manufacturing | – | – | – | – | Plastic (splash-water-protected housing) |
| Soft starter built-in module MEBElectronics manufacturing | – | – | – | – | Plastic (encapsulated version) |
| Soft starter built-in module MINIElectronics manufacturing | – | – | – | – | Plastic (encapsulated version) |
| Inrush current limiter TRR (resistor-relay technology)Electronics manufacturing | – | – | – | – | Polycarbonate (housing) |
| Ballast ESB Profi for electrical power toolsElectronics manufacturing | – | – | – | – | Plastic (splash-water-protected housing) |
| Ballast ESB RRT for transformers and electronic devicesElectronics manufacturing | – | – | – | – | Plastic (splash-water-protected housing) |
| Speed control GEFITRON II for AC motorsElectronics manufacturing | – | – | – | – | Plastic (splash-water-protected housing) |
| Custom electronics (special solutions)Electronics manufacturing | – | – | – | – | – |
| EMC suppression modules & RC networksElectronics manufacturing | – | – | – | – | – |
| Electronics development according to VDE/IEC standardsEngineering | – | – | – | – | – |
Additional services
History
Over 30 years of experience according to the website; year of foundation not stated