The 20 A rating sets the continuous current it can carry without tripping — sized for a branch circuit or load drawing up to that level.
Deployment context
The 1-pole form factor occupies a single module width, so it fits tight gland-plate layouts where every slot counts. Rated operational voltage extends to 400/690 VAC and 125 VDC per the description, covering both three-phase line-to-line and DC control circuits.
