The AB20 Series provides zero‑delay automatic switching between two DC power sources. All models feature anti‑backflow protection, screw terminals, and DIN rail mounting for easy installation. The series includes four variants to suit different voltage, current, and monitoring needs.
Model Variants
AB20A – supports 5–30V DC input, rated total output current 10A, without digital display. Basic model for simple switching tasks.
AB20B – supports 5–30V DC input, rated total output current 20A, without digital display. Higher current capacity for more demanding loads.
AB20C – supports 5–30V DC input, rated total output current 20A, with integrated digital display showing output voltage, active input source, and system status.
AB20D – supports 5–60V DC input, rated total output current 20A, with digital display. Extended voltage range suitable for higher‑voltage industrial systems.
Common Features
All models operate as a true automatic transfer switch: they monitor both inputs and seamlessly connect the higher‑voltage source to the output. When both inputs are equal, the module combines their power (both sources contribute simultaneously). The anti‑backflow diodes prevent reverse current, protecting batteries and connected equipment.
Important Note
For motorised loads (drones, pumps, industrial motors), back‑EMF must be considered. The sum of input voltage and back‑EMF must not exceed the model's maximum input rating.
Typical Applications
Off‑grid solar/wind systems, home/server backup power, and industrial automation control panels.
