Frequently Asked Questions
FAQ Power Supplies
The same questions often come up when choosing and using DIN rail, enclosed and open-frame power supplies. Here you'll find clear, practical answers.
The power supply shuts down at startup or cannot supply the load. Why?
This is likely due to excessive inrush load (overload at the moment of startup).
Possible solutions
- Use a more powerful power supply
- Use a power supply with a higher peak current rating
- Use a power supply with constant-current function
What information is required for a power supply inquiry?
Please describe your application in a few sentences so we can find the right solution. Basic information required:
- Input voltage (e.g. 100–240 VAC, including tolerance range)
- Output voltage(s) and required currents (including continuous and peak power)
- Device type: ITE (EN 62368-1), medical power supply (EN 60601-1), or special standards
- For desktop power supplies: connector type and cable length
- Form factor: open frame, desktop, or enclosed power supply
- Cooling: fan-cooled or fanless
- Ambient temperature (including derating at high temperatures)
- Special EMC standards and power factor correction (PFC class A–D)
- Ripple & noise
- Service life and MTBF
- Mechanical requirements: mounting orientation, dimensions, IP rating
I need a replacement part – what information is required for a DIN-rail, enclosed, or open-frame power supply?
To find a suitable replacement unit, we need the following information:
- Photo of the type label, the cable harness, and the entire unit
- Board dimensions and required connector types
- Desired quantity