Industrial DC Power Supply Sizing Calculator
Compare industrial DC continuous load and transient peak demand with manufacturer output ratings and entered design headroom.
Enter load scenarios and ratings
Transient peak added above the continuous load; use manufacturer data and its stated duration.
DC supply capacity comparison
About this calculator
Compare continuous control-system demand and an additional transient load against separate continuous and transient supply ratings. A user-entered headroom factor is applied to each scenario.
Build the load totals from PLC, relay, sensor, and actuator data for the actual operating sequence.
Method and assumptions
Required continuous output = continuous load × (1 + headroom ÷ 100). Required transient peak = (continuous load + additional transient current) × (1 + headroom ÷ 100).
The estimator does not model transient duration, voltage sag, power factor, charging current, load sequence, or supply derating.
FAQs
What is additional transient current?
Enter the short-duration current above the continuous load for the relevant scenario. Confirm whether the supply data states peak current as total output or overload above rated output, and model it accordingly.
Does a passing comparison approve the panel power supply?
No. Verify supply voltage, derating, overload duration, load sequencing, individual output limits, redundancy, and manufacturer instructions.
Sources
Use manufacturer load currents and the exact power supply continuous, overload, derating, and output-channel ratings.