A switch module of built-in anti-surge disconnection structure mainly comprises an overcurrent protection switch and has anti-surge and disconnection structures ingeniously built inside a fire-proof and heat-resisting housing. The present invention comprises a switch area formed by a binary alloy conductive spring leaf and two connecting points, an anti-surge area formed by at least one bare metal oxide varistor placed in the housing and a plurality of conductive plates, and a disconnection area formed by a spring element, a band, and a thermo-sensitive piece. When the connecting points in the switch area are contacting with each otherturning on the switchand an overvoltage occurs, the temperature of the metal oxide varistor would suddenly rise up to a degree higher than a pre-determined number, melting the thermo-sensitive piece, loosening and displacing the band, thus ejecting the spring element and forcing the connecting points detaching from each other to turn off the switch, so as to ensure more of electricity safety.

A circuit protection device including a housing, a metal oxide varistor disposed within said housing, a terminal having a contact lead at a first end electrically attached to said metal oxide varistor by solder and having a second end extending outside of said housing, an arc shield disposed within said housing between said contact lead and said metal oxide varistor, a micro switch housed in a pocket portion of the housing, said micro switch having a trigger portion and an indicator portion disposed at least partially outside of said housing, said arc shield positioned against said trigger portion, and a spring configured to bias said arc shield away from said pocket portion and to move said arc shield away from said trigger portion when said solder is melted to provide a barrier between said metal oxide varistor and said contact lead, whereby the indicator portion is retracted into the housing.

A high-voltage direct-current thermal fuse comprising a high-voltage low-current thermal fuse connected to a high-voltage direct-current circuit. The high-voltage low-current thermal fuse comprises a casing, fusible alloy wires, wherein the fusible alloy wires are connected between the two leads. One of the leads is sequentially sleeved with an arc extinguishing sleeve and a spring. One end of the arc extinguishing sleeve is in contact with the fusible alloy wires; and the other end of the arc extinguishing sleeve is in contact with the spring. One end of the spring is connected to the inner end face of the casing; and the spring is in a compressed state. The high-voltage direct-current thermal fuse further comprises a conventional thermal fuse; or further comprises a current. The high-voltage direct-current thermal fuse solves the problem of timely arc cutting-off and can be directly applied to a high-voltage direct-current circuit.

A surge suppression device comprising a voltage sensitive element, heat sensitive materials, terminals, a blocking element and a non-conductive barrier is disclosed. One of the terminals comprises an arm portion, a contact portion and an extension portion extended from the contact portion. The blocking element has a part engaging with the extension portion and another part contacting with the barrier and separating the barrier from the arm portion of the terminal. The device has higher structural stability and sensitivity and is only failed in the event that the voltage sensitive element is failed due to aging or grid fault.

A temperature fuse assembly for a high-power DC circuit is provided. The temperature fuse assembly includes a case extending from a first case end to a second case end and an isolated lead projecting from the second case end. A bushing electrically isolates the isolated lead from the case. A high-gauge wire is electrically connected to the case at a first wire end and electrically connected to the isolated lead at a second wire end. A portion of the high-gauge wire is helically wound about an exterior of the bushing. When a temperature of the temperature fuse assembly exceeds a threshold temperature, the temperature fuse assembly is configured to conduct a DC current of the high-power DC circuit through the high-gauge wire. The high-gauge wire is configured to melt under a load of the DC current and interrupt the high-power DC circuit.

A fuse release assembly includes a cap, the cap including a plate member, a first sidewall defining an interior region, and a plurality of first apertures extending through the first sidewall. The fuse release assembly includes an adapter, a release including a plurality of second apertures extending therethrough, a trigger, a biasing element, and a plurality of retention bodies. The fuse release assembly is configured to transition between a first and second state. In the first state, the release is arranged in a first position between the adapter and first sidewall such that the first apertures are colinearly aligned with corresponding second apertures, the plurality of retention bodies arranged in regions defined by the plurality of first apertures and second apertures, and the trigger and the biasing element are arranged in the interior region such that the trigger engages the retention bodies to retain the release in the first position.

A surge protection device includes a metal terminal and a spring. The metal terminal is located between two metal oxide varistors, where the metal terminal extends beyond the metal oxide varistors. The spring has a flat surface that is connected to the metal terminal using a soldering paste. The flat surface has a bend on one end which forms a gap between the flat surface and the metal terminal.

Disclosed in the present invention are a linkage mechanism, a base, and a surge protection device. The linkage mechanism comprises a linkage swing rod and transmission components, wherein the linkage swing rod is arranged to be rotatably connected, and is provided with a trigger portion capable of triggering a switch when rotating and at least two stress portions arranged spaced apart from each other on one side of an axis of rotation of the linkage swing rod; one transmission component is arranged corresponding to each of the stress portions; and the transmission components are arranged in such a way that any of the transmission components applies a pushing force to the stress portion to rotate the linkage swing rod, and thus the trigger portion triggers the switch. According to the surge protecting device using the linkage mechanism provided in the present invention, a module failure signal can be sent out when any surge protection module fails under the condition where only one microswitch is arranged, which not only simplifies the structure of the surge protecting device and reduces the volume, but also reduces the cost.

A surge protection device includes a metal terminal and a spring. The metal terminal is located between two metal oxide varistors, where the metal terminal extends beyond the metal oxide varistors. The spring has a flat surface that is connected to the metal terminal using a soldering paste. The flat surface has a bend on one end which forms a gap between the flat surface and the metal terminal.

A modular surge protection device (SPD) is provided. The modular SPD includes an overvoltage protection component, and a trip mechanism for disconnecting the SPD, where the overvoltage protection component is provided with a pin electrode; the overvoltage protection component includes a voltage switching element; and the trip mechanism is provided on the voltage switching element. The SPD can ensure no action of the trip mechanism in response to a surge in a high-temperature environment, and does not affect the action time of the trip mechanism in response to an abnormal overcurrent.