Title:
Protective device
Document Type and Number:
Japanese Patent JP6357221
Kind Code:
B2
Abstract:
The present invention proposes a protection device which has a large rated voltage and a large rated current, which is capable of sufficiently suppressing arc generation during activation, and which is also capable of providing suitable protection against overcurrent due to short circuiting or the like of a main circuit. The protection device of the present invention includes (i) a protection element which includes a first thermal fuse and a resistor, and in which the resistor generates heat as a result of current passing through the resistor when there are abnormalities, and the first thermal fuse is activated due to this heat and interrupts the current, (ii) a PTC element and a second thermal fuse which are electrically connected in parallel to the first thermal fuse and which are electrically connected in series to each other, and (iii) a current fuse which is electrically connected in series to the first thermal fuse.
Inventors:
Masaaki Iwai
Takayuki Yokota
Takayuki Yokota
Application Number:
JP2016506536A
Publication Date:
July 11, 2018
Filing Date:
March 04, 2015
Export Citation:
Assignee:
littelfuse Japan GK
International Classes:
H02H3/10; H01H85/02; H02H5/04
Domestic Patent References:
| JP2012521635A | ||||
| JP2001313202A | ||||
| JP2013257963A | ||||
| JP2001216883A | ||||
| JP11252789A |
Foreign References:
| WO2015002187A1 |
Attorney, Agent or Firm:
Samejima Mutsumi
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