Otowa Electrical Co.

Japan

Otowa Electrical Co.

Japan

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Patent
Mitsubishi Group and Otowa Electrical Co. | Date: 2013-03-27

Damage can be prevented even when a large current and high voltage load is imposed. A current generation device (1) uses the power supplied from a power supply device (2) to supply, to a test piece (9) under lightning protection test, current that simulates current flowing when lightning occurs. The current generation device (1) comprises: an electric double-layer capacitor that stores power supplied from the power supply device (2) and discharges the stored power; a semiconductor switch (3) for switching whether the power stored on the electric double-layer capacitor is supplied to the test piece (9) or not; and a protection portion (4) connected between the semiconductor switch (3) and the test piece (9) and used for, when current having a predetermined value or more flows through the semiconductor switch (3), disconnecting the connection between the semiconductor switch (3) and the test piece (9).


Patent
Long Ke Electronics Hui Yang Co. and OTOWA Electrical Co. | Date: 2015-07-01

A tubular voltage dependent resistor, comprising: a voltage dependent resistor chip, wherein the voltage dependent resistor chip is tubular, and an inner electrode and an outer electrode are respectively arranged on the inner wall and the outer wall of the tubular voltage dependent resistor chip.


Trademark
OTOWA Electrical CO. | Date: 2011-01-25

Surge protection devices, namely, varistor components for the manufacture of lightning arresters, and varistor components for the manufacture of voltage surge protectors.


Patent
OTOWA Electrical CO. | Date: 2013-03-28

Provided is a non-linear resistive element which improves the degree of freedom of design of its mounting space. A ceramic sheet 10 which constitutes the non-linear resistive element is configured by a plurality of ceramic pieces 11 being consolidated in a plate like form by an insulating resin 12. One or a plurality of ceramic pieces 11 configure each of a plurality of conductive paths which penetrate the ceramic sheet 10 in a thickness direction thereof, and the ceramic pieces 11 which configure both ends of the conductive paths partially projects from the insulating resin 12.


Patent
OTOWA Electrical CO. | Date: 2011-10-05

Provided is a technique to secure compositional or microstructural uniformity of a ceramic sintered body while increasing the area of the ceramic sintered boy, thus improving basic performance including non-linearity, maximum withstand energy and aging characteristics. A plurality of small varistor pieces 11 and insulating resin are kneaded and extruded for shaping, whereby a sheet-form varistor layer 13 can be formed where a plurality of small varistor pieces 11 are spaced from one another and are aligned on the same plane, and the adjacent small varistor pieces 11 are bonded via insulating resin.


Patent
OTOWA Electrical CO. | Date: 2013-03-28

Provided is a non-linear resistive element which enables to narrow an interval between a plurality of electrodes. A ceramic sheet (2) which constitutes the non-linear resistive element is configured by being supported in a sheet like form by a support member (22) composed of an insulating material. A plurality of ceramic pieces (21) are sectioned and arranged in each of a plurality of unit areas (23) which are apart from each other.


Provided is a resin material having non-ohmic properties which has favorable characteristics as a varistor and has a high degree of molding freedom and impact resistance. A resin material 10 comprises: an insulating matrix 11 made of a first resin material; an island-form conductive dispersed phase 12 made of a conductive second resin material which is incompatible with the first resin material and is more wettable to a microvaristor 13 described later than the first resin material is, wherein the island-form conductive dispersed phase is dispersed in an island form in the matrix and has a volume ratio of less than 16% in the whole resin material; and a microvaristor 13 comprising ceramic particles having non-ohmic properties, wherein the ceramic particles are dispersed in the matrix 11 and electrically contacted with each other via the island-form conductive dispersed phase 12.


Patent
Otowa Electrical Co. | Date: 2014-03-05

Provided is a non-linear resistive element which enables to narrow an interval between a plurality of electrodes. A ceramic sheet (2) which constitutes the non-linear resistive element is configured by being supported in a sheet like form by a support member (22) composed of an insulating material. A plurality of ceramic pieces (21) are sectioned and arranged in each of a plurality of unit areas (23) which are apart from each other.


Patent
Otowa Electrical Co. | Date: 2013-07-24

Provided is a technique to secure compositional or microstructural uniformity of a ceramic sintered body while increasing the area of the ceramic sintered boy, thus improving basic performance including non-linearity, maximum withstand energy and aging characteristics. A plurality of small varistor pieces 11 and insulating resin are kneaded and extruded for shaping, whereby a sheet-form varistor layer 13 can be formed where a plurality of small varistor pieces 11 are spaced from one another and are aligned on the same plane, and the adjacent small varistor pieces 11 are bonded via insulating resin.


Patent
Otowa Electrical Co. | Date: 2014-03-19

Provided is a non-linear resistive element which improves the degree of freedom of design of its mounting space. A ceramic sheet 10 which constitutes the non-linear resistive element is configured by a plurality of ceramic pieces 11 being consolidated in a plate like form by an insulating resin 12. One or a plurality of ceramic pieces 11 configure each of a plurality of conductive paths which penetrate the ceramic sheet 10 in a thickness direction thereof, and the ceramic pieces 11 which configure both ends of the conductive paths partially projects from the insulating resin 12.

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