Patent ID: 11916547
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The semiconductor relay device according to claim 1, wherein:
the conversion circuit outputs the second signal at a first node,
the overheat protection circuit includes:
a zener diode having an anode coupled to a second node and a cathode coupled to the first node;
a resistor coupled between the second node and a third node;
a number n of diodes that are serially coupled, wherein an anode of a diode at a first end of the n diodes is coupled to the first node, and a cathode of a diode at a second end of the n diodes is coupled to the third node, where n is a natural number larger than or equal to 2; and
a thyristor having an anode coupled to the first node, a cathode coupled to the second node, and a control terminal coupled to the third node, and

the switch circuit includes a first transistor having a gate coupled to the first node.