Protection Device

Patent metadata

Field	Value
Publication number	US-2016241012-A1
Application number	US-201415023977-A
Country	US
Kind code	A1
Filing date	Sep 24, 2014
Priority date	Sep 25, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

The present invention provides a protection device that can more surely protect an electronic or an electric apparatus even when an inrush current value is large and its magnitude has large dispersion, and that has a recovery property. The protection device of the present invention includes a PTC component; a resistive component; and a first terminal and a second terminal, wherein the first terminal, the PTC component, the resistive component, and the second terminal are electrically connected in series in this order.

First claim

1 . A protection device comprising:
a PTC component; a resistive component; and a first terminal and a second terminal, wherein the first terminal, the PTC component, the resistive component, and the second terminal are electrically connected in series in this order.

2 . The protection device according to claim 1 , wherein a resistance value of the resistive component is 10-fold or more of a resistance value of the PTC component at a room temperature.

3 . The protection device according to claim 1 , wherein the resistance value of the resistive component is 1 to 650 ohms.

4 . The protection device according to claim 1 , wherein the resistive component is a wire wound resistor or a cement resistor.

5 . The protection device according to claim 1 , wherein a holding current of the PTC component is 0.1 to 5 A.

6 . The protection device according to claim 1 , wherein a withstanding voltage of the PTC component is 100 Vac or more.

7 . The protection device according to claim 1 , wherein the PTC component is a polymer PTC component.

8 . The protection device according to claim 1 , wherein the PTC component is under a heat influence of the resistive component.

9 . A protection circuit comprising a protection device, said protection device comprising
a PTC component; a resistive component; and a first terminal and a second terminal, wherein the first terminal, the PTC component, the resistive component, and the second terminal are electrically connected in series in this order.

10 . An electric apparatus comprising a protection device, said protection device comprising
a PTC component; a resistive component; and a first terminal and a second terminal, wherein the first terminal, the PTC component, the resistive component, and the second terminal are electrically connected in series in this order.

11 . The protection device according to claim 2 , wherein the resistance value of the resistive component is 1 to 650 ohms.

12 . The protection device according to claim 2 , wherein the resistive component is a wire wound resistor or a cement resistor.

13 . The protection device according to claim 3 , wherein the resistive component is a wire wound resistor or a cement resistor.

14 . The protection device according to claim 2 , wherein the PTC component is a polymer PTC component.

15 . The protection circuit of claim 9 , wherein a resistance value of the resistive component is 10-fold or more of a resistance value of the PTC component at a room temperature.

16 . The protection circuit of claim 9 , wherein the resistance value of the resistive component is 1 to 650 ohms

17 . The protection circuit of claim 9 , wherein the resistive component is a wire wound resistor or a cement resistor.

18 . The protection circuit of claim 9 , wherein the PTC component is a polymer PTC component.

19 . The electric apparatus according to claim 10 , wherein a resistance value of the resistive component is 10-fold or more of a resistance value of the PTC component at a room temperature

20 . The electric apparatus according to claim 10 , wherein wherein the resistance value of the resistive component is 1 to 650 ohms.

Assignees

• Tyco Electronics Japan G K

Inventors

• Tanaka Arata
• Iwai Masaaki
• Takizawa Tsuyoshi

Classifications

• H01C3/14

  the resistive element being formed in two or more coils or loops continuously wound as a spiral, helical or toroidal winding (H01C3/02 - H01C3/12 take precedence) · CPC title

• H02H3/085 Primary

  making use of a thermal sensor, e.g. thermistor, heated by the excess current (also responsive to the temperature of the protected device H02H5/041, thermal images H02H6/00) · CPC title

• H02H9/026 Primary

  Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient · CPC title

• H02H9/001 Primary

  limiting speed of change of electric quantities, e.g. soft switching on or off (progressive control of electronic switches for eliminating interferences H03K17/16) · CPC title