A circuit protection device is provided. The circuit protection device includes an active energy absorber that is coupled between two power lines in an electrical power distribution system and is configured to selectively conduct fault current responsive to overvoltage conditions. The active energy absorber includes an overvoltage protection module that includes two thyristors that are connected in anti-parallel with one another and a varistor that is connected with the overvoltage protection module as a series circuit. The series circuit including the varistor and the overvoltage protection module is connected between the power lines.

An arrester is disclosed. In an embodiment, the arrester includes a first electrode, a second electrode, a switching contact, a first discharge space between the first and second electrodes and a short-circuiting mechanism suitable for short-circuiting the first and second electrodes and for switching a state of the arrester, wherein, in a first state, at least one electrode of the first and second electrodes is not electrically conductively connected to the switching contact and, in a second state, the at least one electrode is electrically conductively connected to the switching contact.

An electrical bypass apparatus is provided, which comprises first and second terminals for connection across an electrical component; an electrically-triggered bypass switch being switchable to form a short circuit across the first and second terminals; and a first control circuit connected between the first and second terminals. The first control circuit includes mutually coupled first and second windings, the first winding being isolated from the second winding. The first control circuit is configured to inhibit a current flowing between the first and second terminals from flowing through the first winding when a normal operating voltage is present across the first and second terminals; and to permit a current to flow between the first and second terminals and through the first winding when an overvoltage is present across the first and second terminals and thereby induce a current pulse in the second winding.

An electrostatic discharge protection circuit includes a diode bridge in parallel with a thyristor and a first avalanche diode. The diode bridge is coupled between first and second nodes. The thyristor has an anode coupled to the first node and a cathode coupled to the second node. The first avalanche diode has a cathode coupled to the first node and an anode coupled to the second node. A second avalanche diode has a cathode coupled to the first node and an anode coupled to a gate of the thyristor. When an electrostatic discharge occurs, current flows through the diode bridge, into the first node, and is first dissipated by the avalanche diode and is thereafter also dissipated by the thyristor once the thyristor turns on.

A circuit protection device is provided. The circuit protection device includes an active energy absorber that is coupled between two power lines in an electrical power distribution system and is configured to selectively conduct fault current responsive to overvoltage conditions. The active energy absorber includes an overvoltage protection module that includes two thyristors that are connected in anti-parallel with one another and a varistor that is connected with the overvoltage protection module as a series circuit. The series circuit including the varistor and the overvoltage protection module is connected between the power lines.

In accordance with at least one embodiment, an ESD device comprises: a semiconductor; a pad; a ground rail; a p-well formed in the semiconductor; a first p-type region formed in the p-well and electrically coupled to the ground rail; a first n-type region formed in the p-well and electrically coupled to the pad; a second n-type region formed in the p-well and electrically coupled to the ground rail; an n-well formed in the semiconductor; a first n-type region formed in the n-well; a first p-type region formed in the n-well and electrically coupled to the pad; and a second p-type region formed in the n-well and electrically coupled to the first n-type region formed in the n-well.

A safety protection circuit is described, comprising a fuse, a first voltage detection circuit, a first Silicon-Controlled Rectifier, SCR, wherein the first SCR is triggered upon detection of a threshold voltage by the first voltage detection circuit, a second voltage detection circuit, and a second SCR, wherein the second SCR is triggered upon detection of a threshold voltage by the second voltage detection circuit.

An electrical system includes an input node electrically connectable to a power supply. The system includes a plurality of voltage suppressors, with at least one of the voltage suppressors electrically connected to the input node. A voltage selection switch is electrically connected to at least one of the plurality of voltage suppressors. A controller in communication with the switch may selectively operate the switch based on a nominal operating voltage at the input node.

An electrical energy receiving end capable of overvoltage protection and a wireless electrical energy transmission device are provided. An electrical energy receiving coil is divided into a first receiving coil and a second receiving coil, so that under normal operation the first receiving coil and the second receiving coil jointly resonate with an impedance matching network to receive energy. When the electrical energy receiving end has an overvoltage, the first receiving coil and the impedance matching network (or the second receiving coil and the impedance matching network) form a loop, and due to the impedance mismatch, the energy received by the electrical energy receiving end is greatly reduced to solve the problem of overvoltage at the electrical energy receiving end.

A circuit includes electrostatic discharge (ESD) protection circuitry, triggering circuitry, transient detection circuitry, and deactivation circuitry. The ESD protection circuitry is coupled between a first rail and a second rail. The triggering circuitry is configured to generate an ESD activation signal when a voltage across the first rail and the second rail exceeds a voltage threshold. The ESD protection circuitry is configured to activate based on the ESD activation signal. The transient detection circuitry is configured to generate a deactivation signal when the voltage across the first rail and the second rail comprises a voltage change over time that is less than a transient threshold. The deactivation circuitry is configured to deactivate the triggering circuitry based on the deactivation signal.