Abstract: A method for litz wire termination includes placing a ferrule over exposed conductors on an end of litz wire. The exposed conductors include a portion of the litz wire without an external insulation layer, and a portion at the end of the litz wire protrude past the ferrule. The method includes crimping the ferrule to the litz wire and placing the end of the litz wire with the ferrule in molten solder past the end of the ferrule. The method includes maintaining the litz wire in the molten solder until insulation on conductors of the litz wire is removed from the conductors in the molten solder and solder bonds to the conductors that are within in the molten solder. The method includes removing the litz wire from the molten solder and allowing the litz wire to cool until molten solder bonded to the conductors transitions to a solid state.

Abstract: A method for litz wire termination includes placing a ferrule over exposed conductors on an end of litz wire. The exposed conductors include a portion of the litz wire without an external insulation layer, and a portion at the end of the litz wire protrude past the ferrule. The method includes crimping the ferrule to the litz wire and placing the end of the litz wire with the ferrule in molten solder past the end of the ferrule. The method includes maintaining the litz wire in the molten solder until insulation on conductors of the litz wire is removed from the conductors in the molten solder and solder bonds to the conductors that are within in the molten solder. The method includes removing the litz wire from the molten solder and allowing the litz wire to cool until molten solder bonded to the conductors transitions to a solid state.

Abstract: A surge protection device comprises a gas-tight container formed by a ceramic housing and ceramic lid surrounding an uncoated MOV device, to contain explosive gases and scattered solids produced during a thermal runaway. There is no coating on the MOV device, such as an organic polymer coating. Instead, the ceramic housing has two gas-tight chambers separated by a ceramic partition. The MOV device is located in a first gas-tight chamber and has an electrode that passes into the second gas-tight chamber and terminates in a fixed contact. A thermal cutoff device of simple construction, is located in the second gas-tight chamber, having a spring connector terminating in a moveable contact that is bonded to the electrode by a low melting point solder. The ceramic partition shields the thermal cutoff device from being fouled by debris scattered from destruction of the MOV device's metal oxide core during a thermal runaway.

Abstract: A surge protection device comprises a gas-tight container formed by a ceramic housing and ceramic lid surrounding an uncoated MOV device, to contain explosive gases and scattered solids produced during a thermal runaway. There is no coating on the MOV device, such as an organic polymer coating. Instead, the ceramic housing has two gas-tight chambers separated by a ceramic partition. The MOV device is located in a first gas-tight chamber and has an electrode that passes into the second gas-tight chamber and terminates in a fixed contact. A thermal cutoff device of simple construction, is located in the second gas-tight chamber, having a spring connector terminating in a moveable contact that is bonded to the electrode by a low melting point solder. The ceramic partition shields the thermal cutoff device from being fouled by debris scattered from destruction of the MOV device's metal oxide core during a thermal runaway.