Now that autos are moving toward high-powered battery voltage, the industry is turning new attention toward making sure the flow can stop on a dime when needed. Power management company Eaton Corp.

Transistor VT2 provides short-circuit protection to the load, with red LED D4 indicting an overload. (D2 blows out simultaneously with an overload.) Short-circuit current does not exceed 38 mA.

A short circuit on a Red Line train prevented a failsafe from triggering and allowed the vehicle to leave the station while a passenger was trapped in a door, federal investigators concluded while ...