| CPC H01C 7/12 (2013.01) [H01C 1/02 (2013.01); H05K 1/0213 (2013.01); H05K 1/0218 (2013.01); H05K 1/18 (2013.01); H05K 2201/10022 (2013.01)] | 20 Claims |

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1. A surge protective device (SPD) module comprising:
a printed circuit board (PCB);
a first electrode comprised of a housing electrode defining a cavity and a housing electrode opening communicating with the cavity;
a second electrode; and
a varistor electrically connected between the first and second electrodes and contained in the cavity;
wherein:
the SPD module forms a housing assembly defining a chamber containing the varistor; and
the PCB forms a portion of the housing assembly and closes the housing electrode opening to enclose the chamber.
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