Electronic control device

An electronic control device comprising:

• a first input-output terminal and a second input-output terminal through which differential signals are input and output;
• a transceiver integrated circuit (IC) that transmits and receives the differential signals;
• a first line that connects the first input-output terminal and the transceiver IC;
• a second line that connects the second input-output terminal and the transceiver IC;
• a first varistor element provided on a first ground line that connects the first line and the ground;
• a second varistor element provided on a second ground line that connects the second line and the ground;
• a first capacitor element connected in parallel to the first varistor element;
• and
• a second capacitor element connected in parallel to the second varistor element,
• wherein a first capacitance that is a capacitance between the first line and a ground is at least 80 pF and at most 220 pF,
• a second capacitance that is a capacitance between the second line and the ground is at least 80 pF and at most 220 pF,
• the first capacitance is a sum of a capacitance of the first varistor element and a capacitance of the first capacitor element, and
• the second capacitance is a sum of a capacitance of the second varistor element and a capacitance of the second capacitor element.