Fuse arrangement and capacitor containing a fuse

• US 5,586,014 A
• Filed: 04/25/1995
• Issued: 12/17/1996
• Est. Priority Date: 04/28/1994
• Status: Expired due to Fees

• Current Assignee: ROHM Co., Ltd.
• Original Assignee: ROHM Co., Ltd.
• Inventors: Hasegawa, Miki
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): Dinkins, Anthony
• Application Number:
  US08/428,889
• Time in Patent Office: 602 Days
• Field of Search: 361/435, 361/534, 361/104, 361/523, 361/524, 361/529, 361/504, 361/503, 337/142
• US Class Current: 361/534
• CPC Class Codes: H01G 2/14 Protection against electric or thermal overload by cooling H01G2/08
• CPC Class Codes: H01G 9/0003 Protection against electric or thermal overload; cooling arrangements; means for avoiding the formation of cathode films H01G9/12 takes precedence
• CPC Class Codes: H01H 2085/0414 Surface mounted fuses
• CPC Class Codes: H01H 2085/381 with insulating body insertable between the end contacts of the fusible element
• CPC Class Codes: H01H 85/0411 Miniature fuses
• CPC Class Codes: H01H 85/046 Fuses formed as printed circuits

Abstract

A fuse arrangement includes a fuse element having a serpentine shape disposed resilient and incombustible or fire-resistant insulating plates and external connection terminals formed at the fuse arrangement. A capacitor has a safety fuse with a fuse element formed between two insulating plates affixed to one end surface of a chip piece of the capacitor so that one end of the safety fuse element is electrically connected to one electrode of the capacitor, and a connection terminal electrode film is formed on the outer surface of the safety fuse body connected to the other end of the safety fuse element.

Claims

1. A fuse arrangement comprising a fuse element having a serpentine shape and two insulating plates, at least one of which is resilient and made of incombustible or fire-resistant material, disposed on opposite sides of the fuse element, the two insulating plates having facing surfaces and the serpentine shape of the fuse element being disposed between the facing surfaces of the insulating plates.

2. A fuse arrangement according to claim 1 wherein the fuse element has an eddy-like shape.

3. A fuse arrangement according to claim 1 wherein the fuse element has a zigzag shape.

4. A solid electrolytic capacitor having a safety fuse comprising a capacitor body including a chip piece formed of a porous body made of hardened metal powder and two electrodes, and a safety fuse arrangement including a safety fuse element disposed between two insulating plates having facing surfaces, the safety fuse element having a serpentine shape disposed between the facing surfaces of the insulating plates, the safety fuse arrangement being affixed to one end surface of the chip piece and one end of the safety fuse element being electrically connected to one of the electrodes of the capacitor, and a connection terminal electrode film formed on the outer surface of said safety fuse, the other end of the safety fuse element being electrically connected to the connection terminal electrode film.

5. A solid electrolytic capacitor comprising a capacitor body including a chip piece formed of a porous body made of hardened metal powder and two electrodes, and two safety fuse arrangements, each including a safety fuse element disposed between two insulating plates having facing surfaces, the safety fuse element having a serpentine shape disposed between the facing surfaces of the insulating plates, each of said safety fuse arrangements being affixed to a corresponding end surface of the chip piece of the capacitor body with one end of the safety fuse element therein being electrically connected to a corresponding electrode of the capacitor, each safety fuse arrangement having a connection terminal electrode film formed on an outer surface of the safety fuse arrangement which is electrically connected to the other end of the safety fuse element therein.