Electronic part and electronic control unit

摘要

A main body of an electronic part has multiple electrodes, to which multiple terminals are connected. The terminals include a normal terminal and a fuse terminal, each of which extends from lands formed in a printed board so as to hold the main body at a position above and separated from a board surface of the printed board. The fuse terminal has a cut-off portion having a smaller width than other portions of the fuse terminal, so that the cut-off portion is melted down when excess current flows in the fuse terminal. The normal terminal holds the main body at the position above and separated from the board surface even in a case of melt-down of the cut-off portion.

主权项

1. An electronic part mounted to a printed board comprising:
a main body arranged at a position above and separated from a board surface of the printed board, the main body having at least one electronic element and multiple electrodes for the electronic element; and multiple terminals respectively connected to each of the electrodes at each one end of the terminals and connected to each of lands formed in the printed board at each other end of the terminals, each of the terminals extending from the main body in a direction to the board surface in order to hold the main body at the position above and separated from the board surface in a condition that each of the terminals is electrically connected to the respective electrodes and the respective lands; wherein each of the terminals has an electrode-connected portion electrically connected to a corresponding electrode of the main body and a land-connected portion electrically connected to a corresponding land formed in the printed board, wherein the terminals include at least one fuse terminal and at least one normal terminal, wherein the fuse terminal has a cut-off portion, which is formed between the electrode-connected portion and the land-connected portion, a width of the cut-off portion is made smaller than a width of other portions of the fuse terminal, the cut-off portion is configured to be melted down depending on heat generated at the cut-off portion due to excess current in order to cut off electrical connection between the corresponding electrode and the land, and wherein at least one normal terminal holds the main body at the position above and separated from the board surface when at least one fuse terminal cuts off the electrical connection between the corresponding electrode and the land by melt-down of the cut-off portion, wherein the normal terminal includes: a first wall portion extending from the land-connected portion to the electrode-connected portion; and a second wall portion connected to one horizontal side of the first wall portion in a direction parallel to the board surface, wherein the second wall portion is bent by a predetermined angle with respect to the first wall portion so that a thickness direction of the second wall portion is different from that of the first wall portion, in order that the normal terminal holds by itself the main body at the position above and separated from the board surface when the cut-off portion of the fuse terminal is melted down.