Transformer power supplies
Transformer power supplies - Robust power supply for industrial applications
Safety, reliability and durability in a compact power supply unit
Transformer power supplies, also known as transformer power supply units, offer a reliable and durable solution for supplying electrical and electronic systems with a stable output voltage. In contrast to switching power supply units, they impress with their robust design, EMC resistance and high immunity to interference – especially in demanding industrial environments.
Rist Transformatorenbau GmbH develops and manufactures high-quality transformer-based power supply units – ideal for machine control systems, measurement and control technology, safety applications and control cabinet construction.
- Single-phase and three-phase transformer power supply units as well as customer-specific applications possible
- Adaptation and flexibility to specific customer requirements and broad portfolio
- High quality, long usability and robust power supply made in Germany
- Available as standard or customer-specific solution
Our range of transformer power supply units
Our power supply units are developed individually according to customer specifications – in various designs, power classes and voltage ranges:
Single-phase and three-phase transformer power supplies up to 60 A
Compact power supply units for installation in control cabinets
Isolating power supply units according to EN 61558
UL-compliant power supply units for export (e.g. USA/Canada)
Adjustable output voltages (e.g. 24 V AC / 12 V AC / 48 V AC)
Versions with screw or plug-in terminals, optionally encapsulated
Ready to install with mounting bracket, clamping cover or housing
Examples of our transformer power supply units
Technical advantages of our transformer power supply units
High reliability and long service life thanks to simple, robust technology
Galvanic isolation of mains and output voltage possible
No high-frequency interference, ideal for sensitive applications
Thermally resilient up to insulation class F/H
EMC-friendly, even in interference-critical system environments
Maintenance-free, mechanically resistant
Also available as a UL-compliant version for international projects
Standards & certifications
Depending on the version, our transformer power supply units meet the following standards:
EN 61558 – Safety of transformers and power supply units
EN 61558-2-6 – Safety requirements for power supply units with disconnection
UL File E493155 – For customized transformer-based power supply units
Other standards can be realized on request
Why transformer power supplies from Rist?
✅ Over 70 years of experience in transformer and power supply construction
✅ Production in Germany with maximum vertical integration
✅ Customized solutions for mechanical engineering, control technology & industry
✅ Personal advice & technical support from the start of the project
✅ Also available for small series or OEM projects
✅ UL approvals for international use
What customers should know about transformer power supplies
Transformer power supply units convert mains voltage into a safe output voltage via a transformer – usually in the form of AC voltage (e.g. 24 V AC). These devices are particularly suitable when an interference-free, robust power supply is required, for example in control systems, safety systems, reed contacts, solenoid valves or industrial lights.
In contrast to switching power supplies, which rely on clock frequencies and electronic regulation, transformer power supplies work with classic winding technology – which makes them EMC-resistant, load-stable and durable. Transformer power supply units are the better choice, particularly in systems where high interference immunity, durability or simple maintenance are paramount.
Thanks to optional galvanic isolation (e.g. through integrated isolating transformers), they also offer additional safety for man and machine. Combined with a mechanically robust design, they are the ideal solution for switch cabinet construction, building automation or the export of sensitive system components.
Our claim: Power supply units that you can rely on – even under the toughest conditions.