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AC-DC Power Supplies


20-40A DIN Rail Redundancy Modules

The DRM40 series of 20 to 40A DIN rail mount redundancy modules can be used in N+1 redundancy applications or to parallel two power supplies for additional power. The DRM40 has a current balancing LED indicator which is illuminated when both power supplies have been adjusted to deliver the same current. Two isolated alarm signals indicate the output voltage status of each power supply. Internally the DRM40 has a low 200mV voltage drop.



  • Compact Size  
  • Low 200mV Voltage Drop 
  • Current Balance Indicator Option 
  • Isolated Alarm Signals


Product Range Information

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Part number Additional Information Status Datasheet
DRM40 10 – 30V / Up to 40A, Balancing & Signalling Current product Datasheet
DRM40B 10 – 30V / Up to 40A Current product Datasheet
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DRM40 videos

Range Overview Video

DRM40 20-40A DIN Rail Redundancy Modules Video


FAQ Video

How do I use the DRM40 DIN rail redundancy modules current balance feature?

FAQ Video

How can DRM40 DIN rail redundancy modules be used?

FAQ Video

How can I monitor the status of input voltages for DRM40 DIN rail redundancy modules?

FAQ Video

What is the internal voltage drop in the DRM40 DIN rail redundancy modules?

FAQ Video

Do DRM40 DIN rail redundancy modules have safety certifications?

FAQ Video

Can DRM40 DIN rail redundancy modules deliver peak power ratings?

FAQ Video

What is the difference between DRM40 and DRM40B DIN rail redundancy modules?

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DRM40 Technical Downloads



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DRM40 In the TDK-Lambda Newsroom

Low loss, 20A to 40A DIN rail redundancy module has load sharing balance indication
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