Patent ID: 8093974

Claim:
An electromagnetic relay comprising: a housing having an accommodating space inside the housing; a magnet coil disposed in the accommodating space and configured to generate electromagnetic force when energized; a moving contact disposed in the accommodating space and driven by the magnet coil as a result of energization of the magnet coil; a fixed contact disposed in the accommodating space, wherein the moving contact is engaged with or disengaged from the fixed contact as a result of whether the moving contact is driven or not; a breathing hole formed in the housing so as to communicate between the accommodating space and an exterior space of the housing; a flame propagation route along which a flame of flammable gas ignited by arc generated between the moving contact and the fixed contact propagates toward the breathing hole; a coil terminal made of metal, one end of which is connected to the magnet coil, and the other end of which projects into an outside of the housing; and a coil terminal insertion hole formed in the housing so as to communicate between the accommodating space and the exterior space of the housing, the coil terminal inserted into the coil terminal insertion hole, wherein the breathing hole is formed adjacent to the coil terminal insertion hole with the breathing hole communicating with the coil terminal insertion hole, the flame propagation route includes a plurality of flame extinguishment clearances, each of which is set to have such a gap size that the flame is extinguished when passing through each of the plurality of flame extinguishment clearances, and a gap size of the breathing hole is set at such a size as to extinguish the flame.