Current Calculator & Multi-Device Sizer
Calculate total electrical current draw, size power supplies applying the 80% continuous duty headroom recommendation, and sum multiple devices sharing a single DC splitter.
Purchase a standard 12V 2.5A, 3.0A, or 5.0A power supply. Extra amperage capacity is compatible and ensures the adapter runs cool.
Devices on Shared DC Splitter
All connected devices must require identical operating voltage!
💡The Golden Rule of Amperage in DC Power Supplies
1. Current is PULL, not PUSH
The device's internal circuitry dictates how much electrical current (Amps) it draws. An adapter rated at 12V 5A connected to a 12V 1A camera will only deliver 1 Amp. Having extra amperage capacity is fully compatible and safe, allowing the adapter to run with cool thermal headroom.
2. The Danger of Undersized Amps
Using a 1A adapter on a 2A device causes the adapter to overheat, trigger its overcurrent thermal shutdown, or output sagged voltage resulting in device reboots, damaged filter capacitors, and shortened adapter lifetime.
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