The present disclosure provides a surge protector device comprising an electrical connector for connecting said surge protector device to a current network, at least one metal oxide varistor (MOV) connected to said electrical connector; and a first containment unit at least partially filled with a medium having dielectric, heat resistance and elastic properties embedding said at least one MOV unit within said first containment unit, said containment unit having at least one opening; wherein upon failure of said at least one MOV unit due to a surge in said current network said opening allows expansion gases created by said at least one MOV unit to be discharged from said first containment unit. In another embodiment, the surge protector connects directing to an electrical board and discharges expansion gases therein.

A PTC starter is provided. A first pin is electrically connected to a first electrode of a thermistor. The thermistor and an elastic element are arranged in respective mounting cavities. The elastic element is provided with a connecting piece, through which a second pin is electrically connected to or disconnected from a second electrode of the thermistor. In a normal state of the thermistor, the elastic element is in an elastic deformation state, a first contact part and a second contact part of the elastic element are in electrical contact with the second electrode of the thermistor and the second pin respectively. After the thermistor ruptures, the elastic element resets, which causes the connecting piece to move so that the second contact part of the elastic element detaches from the second pin. An isolation structure is provided between the thermistor mounting cavity and the elastic element mounting cavity.

A surge protective device (SPD) assembly includes a base and an SPD module configured to be mounted on the base. The SPD module includes an SPD module PCB, an SPD module circuit, and a thermal disconnector mechanism. The SPD module circuit is at least partly embodied in the SPD module PCB and includes an overvoltage protection component mounted on the SPD module PCB. The thermal disconnector mechanism is mounted on the SPD module PCB in a ready configuration. The thermal disconnector mechanism is operative to transition from the ready configuration to an actuated configuration responsive to sufficient overheating of the overvoltage protection component. When the thermal disconnector mechanism is positioned in the ready configuration, the SPD circuit forms a first current path through the overvoltage protection component. When the thermal disconnector mechanism is positioned in the actuated configuration, the thermal disconnector mechanism forms an alternate second current path that bypasses the overvoltage protection component.

The present disclosure is directed to a method of producing a surge arrestor module, comprising the acts of (i) providing a plurality of MOV blocks arranged in a stack, (ii) applying an epoxy-reinforced structural layer to an outer surface of the stack, (iii) after the applying, inserting the stack into a flexible bladder, and (iv) curing the epoxy-reinforced structural layer with elevated temperatures while the flexible bladder applies radially aligned pressure to the stack and a tool applies axially aligned pressure to the stack. The present disclosure also includes an apparatus for performing the methods described herein. The apparatus includes an outer case structure and a flexible bladder that fits within the outer case structure. A hollow inner region of the outer case structure is pressurized to force the flexible bladder against the surge arrestor module as the surge arrestor module is curing.

A composite circuit protection device includes: a first positive temperature coefficient (PTC) component; a first voltage-dependent resistor (VOR); a second VOR; and a plurality of conductive leads that correspondingly connect to the first PTC component, the first VOR and the second VOR. The second VOR and the first PTC component are electrically connected in series, the first VOR and the second VOR are electrically connected in parallel, the first PTC component and the first VOR are electrically connected in parallel, and the first VOR has a varistor voltage greater than that of the second VOR as determined at 1 mA.

A surge protection device with a high breaking capacity includes a housing with at least two lead-out electrodes, and a voltage limiting device and a thermal tripping mechanism that are installed in the housing. The voltage limiting device includes a voltage limiter, a first electrode and a second electrode that are positioned and installed in an insulating cover. The thermal tripping mechanism includes a fixed assembly, a movable assembly and a thermal trigger device. The fixed assembly and the movable assembly form a plurality of displacement switches arranged in series. The thermal trigger device is disposed in linkage with the movable assembly and includes a metal trigger sheet, a fusible alloy and an energy storage member. One end of the metal trigger sheet is fixed on the movable assembly, and the other end of the metal trigger sheet is fixed on the second electrode through welding by the fusible alloy.

The invention provides a surge protector, in particular for information technology and/or communications technology systems, which is equipped with: a housing (ST, BT; GT); a first input terminal (E1) for applying a first external voltage signal; a second input terminal (E2) for applying a second external voltage signal; a first output terminal (A1) for outputting the first external voltage signal; a second output terminal (A2) for outputting the second external voltage signal; a surge protection circuit device (G1, R1, Z1; G1, G2, R1, R2, Z1; G1, G2, R1, R2, Z1, Z2), at least part of which is provided on a circuit board (P) located in the housing (ST, BT; G); a first current path (ST1) for conducting the first external voltage signal from the first input terminal (E1) to the first output terminal (A1) bypassing the surge protection circuit device (G1, R1, Z1; G1, G2, R1, R2, Z1; G1, G2, R1, R2, Z1, Z2); a second current path (ST2) for conducting the second external voltage signal from the second input terminal (E2) to the second output terminal (A2) bypassing the surge protection circuit device (G1, R1, Z1; G1, G2, R1, R2, Z1; G1, G2, R1, R2, Z1, Z2); a third current path (ST3) for conducting the first external voltage signal from the first input terminal (E1) to the first output terminal (A1) via the surge protection circuit device (G1, R1, Z1; G1, G2, R1, R2, Z1; G1, G2, R1, R2, Z1, Z2); a first switching contact device (F1) for opening and closing the first current path (ST1); a first electrical surge protection component (G1) which is connected between the first and third current paths (ST1, ST3); and a mechanical tripping device (AU; B, S, EF, SL) for opening the first switching contact device (F1) when in a non-tripped state and for closing the first switching contact device (F1) in order to interrupt the third current path (ST3) when in a tripped state at a tripping current in the surge protection circuit device (G1, R1, Z1; G1, G2, R1, R2, Z1; G1, G2, R1, R2, Z1, Z2) caused by exceeding a nominal parameter and/or by degrad

A flat spring (100) is disclosed, for use in a surge protection device (SPD) such as a fast activation thermal fuse, to be integrated with a thermal metal oxide varistor (TMOV). The flat spring (100) has a V-shaped protrusion (110) to enable ultra-high short circuit current protection under overvoltage condition.

A metal oxide varistor (MOV) device including a MOV chip, electrically conductive first and second electrodes disposed on opposite sides of the MOV chip, and electrically conductive first and second leads connected to the first and second electrodes, respectively, wherein the first and second electrodes are formed of a material having a melting point greater than 1100 degrees Celsius.

In an embodiment a thermal protection device includes a housing, a varistor partly embedded in the housing, wherein the housing electrically insulates the varistor, and wherein the varistor includes a partly uninsulated contact surface, an inner wall of insulating material arranged adjacent to the contact surface of the varistor, a window in the inner wall configured to allow an electrical connection of the contact surface of the varistor in an operational state of the thermal protection device and a moveable insulation block configured to cover the window in the inner wall to insulate the varistor in a region of the window of the inner wall in a fault state of the thermal protection device.