Can I connect products with different capacities in a series?
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A. It is possible to connect products with different capacities in series.
However, please use a load current within the range of the model with the smallest maximum output current.

Example) Operation of a 63V output voltage stack series consisting of (1) 150W-48V output model and (2) 50W-15V output model
(1) 150W-48V output model: Output voltage = 48V, Output current = 3.3A (100%)
(2) 50W-15V output model: Output voltage = 15V, Output current = 3.5A (100%)

The maximum output current for the (1) 150W-48V output model and the (2) 50W-15V output model are 3.3A and 3.5A respectively, so the upper limit of the load current is 3.3A, which is the smaller of the two models (150W-48V output model).

TDK-Lambda products are designed with SELV (ES1 in 62368-1: Safety extra low voltage circuit), and the target is the circuit of DC 60V or less.
If the power supply outputs are connected in series that do not exceed SELV (ES1 in 62368-1), the safety standard acquired as "single power supply" is valid.
If the safety voltage (peak value 42.4V, DC 60V) is exceeded, the obtained safety standard will be invalid.
In this case, there are other points to note, so please contact TDK-Lambda.