Importance

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Abstract

A power module according to the present disclosure comprises: a circuit board disposed on a main surface of a base plate; a main terminal part capable of inputting power to a circuit pattern of the circuit board; an output terminal part capable of outputting the power converted by a power semiconductor element connected to the circuit pattern; a case having a side wall part that while being disposed on the main surface, surrounds the circuit board in a main surface-widening direction to define a housing space for housing the circuit board, and a lid part that is disposed on the side wall part to close off the housing space, thereby blocking off the inside of the housing space; an insulating part disposed inside the housing space to bury the circuit board; and an optical detection part disposed in the case and capable of detecting the light generated inside the housing space due to the entrance of the light from a distal end surface. A plurality of distal end surfaces of the optical detection part are arranged side by side along a side edge part of the circuit pattern opposed to an inner surface of the side wall part in the housing space so that an optical detection range includes the side edge part.

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First Claim