Varistor component and method for securing a varistor component

A varistor component comprising:

• a first external contact;
• a second external contact;
• a third external contact;
• a varistor electrically connected to the first external contact;
• a path between the varistor and the second external contact;
• an active releasing device having a shutter and a heat sensitive element,
• wherein, under abnormal operation conditions, the heat sensitive element is configured to release the shutter, and the shutter is configured to move along a straight line and close the path between the varistor and the second external contact;
• and
• a linear guide rail,
• wherein the shutter is arranged in the guide rail,
• wherein the heat sensitive element is a metallic body extending through the guide rail and through the shutter and electrically connecting the varistor to the second external contact,
• wherein the shutter is a mainly cuboid shaped slider with a hole or a notch,
• wherein the guide rail has a mainly cuboid shape and houses the slider and an element configured to exert a force onto the shutter,
• wherein, under normal operation conditions, the heat sensitive element is a bolt that extends through two holes in the guide rail—with one hole at each side—and through the hole of the slider,
• wherein the guide rail establishes a mask, and
• wherein the mask and the shutter have such a geometrical shape that a probability that remaining material of the heat sensitive element maintains an electrical connection is reduced.