Using MEAN WELL Power Supplies with Current Sharing Function

You can connect any two MEAN WELL power supplies in parallel, so long as they have MEAN WELL’s current sharing function.

We have had customers suggest that any two power supplies can be connected in parallel, so long as two diodes are used to isolate them.

This is not true. This will give you redundancy. In other words, if one power supply fails then the other will take over the load. But it will not allow the power supplies to share the load.

The product data sheets show how two power supplies with the current sharing function should be connected.

The wiring diagram below has been taken from the RST-10000’s data sheet. Please refer to the data sheet for the actual power supply you wish to use.

Current sharing diagram for MEAN WELL RST-10000 power supply — Connecting MEAN WELL RST-10000 in Parallel

Current sharing is usually found on larger MEAN WELL power supplies. It is not featured on the smaller models as the best solution to provide more power is to use a larger power supply.

The following series of power supplies feature the current sharing function.

DIN Rail Power Supplies with Current Sharing Function

Series	MAX Units and Power	Image
SDR-960 Single Phase	Up to 4 = 3480 WATTS
TDR-960 Three Phase	Up to 4 = 3480 WATTS

Enclosed Power Supplies with Current Sharing Function

Series	MAX Units and Power	Image
PSP-600	Up to 4 = 2400 WATTS
RSP-1000	Up to 4 = 4000 WATTS
RSP-1500	Up to 4 = 6000 WATTS
RSP-1600	Up to 6 = 9600 WATTS
RSP-2000	Up to 4 = 8000 WATTS
RSP-2400	Up to 3 = 7200 WATTS
RSP-3000	Up to 3 = 9000 WATTS
RST-5000	Up to 4 = 20,000 WATTS
RST-10000	2 only = 20,000 WATTS

Please do not hesitate to contact ADM if you have any questions about using MEAN WELL power supplies in parallel. A member of our expert team will gladly answer any questions you may have.