Solid state relay

Abstract

A solid state relay is formed by mounting a light-emitting element on a light-emitting side lead frame, mounting a light-receiving element or a switching element which operates in response to the light-receiving element and signals from the light-receiving element on a light-receiving side lead frame, arranging these lead frames on the light-emitting side and the light-receiving side to opposite each other, and sealing into one package and is formed by mounting protective element that protects the light-emitting element or the light-receiving element on at least one of the lead frames and arranging the protective element or the protective element and the switching element inside a primary mold resin that seals the light-emitting element and the light-receiving element.

1 . A solid state relay formed by mounting a light-emitting element on a light-emitting side lead frame, mounting a light-receiving element or a light-receiving element and a switching element which operates in response to signals from the light-receiving element on a light-receiving side lead frame, arranging the light-emitting side and the light-receiving side lead frames in opposition to each other, and sealing the lead frames into one package, 
 wherein a protective element that protects the light-emitting element or the light-receiving element is mounted on at least one of the lead frames; and    wherein the protective element or the protective element and the switching element are arranged inside a primary mold resin that seals the light-emitting element and the light-receiving element.    
   
   
       2 . The solid state relay according to  claim 1 , 
 wherein the protective element is arranged to be separated from the opposing lead frame and any of the light-emitting element, the light-receiving element, or the light-receiving element and the switching element mounted on this lead frame.    
   
   
       3 . The solid state relay according to  claim 2 , 
 wherein the protective element is mounted opposite a region where the lead frame is not present.    
   
   
       4 . The solid state relay according to  claim 2 , 
 wherein the protective element is mounted on a side of at least one of the lead frames that is the rear side to the side on which elements are mounted.    
   
   
       5 . The solid state relay according to  claim 2 , 
 wherein the lead frame opposite the protective element is bent in the direction away from the protective element.    
   
   
       6 . The solid state relay according to  claim 2 , 
 wherein a concave portion for mounting the protective element is formed in at least one of the lead frames.    
   
   
       7 . The solid state relay according to any of the  claims 1  to  6 , 
 wherein a floating island portion and a peripheral portion surrounding this floating island portion are provided in at least one of the lead frames;    wherein a plurality of mounting portions with different gaps between the floating island portion and the peripheral portion opposing each other are provided at the floating island portion and the peripheral portion that opposes the floating island portion; and    wherein the protective elements are mounted to bridge these mounting portions.