| Picture | Part Number | Description | Category | Manufacture |
 | OP565B | PHOTODARL SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP565A | PHOTODARL SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP560B | PHOTODARL SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP560A | PHOTODARL SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP555D | PHOTOTRNS NPN PLASTIC SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP555C | PHOTOTRANS SILICN NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP555B | PHOTOTRNS NPN PLASTIC SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP555A | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP552C | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP552B | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP552A | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP550D | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP538FC | PHOTODARL SILCN NPN FLAT SD LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP538FB | PHOTODARL SILCN NPN FLAT SD LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP538FA | PHOTODARL SILCN NPN FLAT SD LOOK | Current Sensors | TT Electronics/Optek Technology |
 | OP535C | PHOTODARLINGTON SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
| OP535B | PHOTODARLINGTON SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
| OP535A | PHOTODARLINGTON SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
| OP509C | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP509B | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP509A | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
 | OP508FC | PHOTOTRANS SILICON NPN FLAT LENS | Current Sensors | TT Electronics/Optek Technology |
| OP508FB | PHOTOTRANS SILICON NPN FLAT LENS | Current Sensors | TT Electronics/Optek Technology |
| OP508FA | PHOTOTRANS SILICON NPN FLAT LENS | Current Sensors | TT Electronics/Optek Technology |
| OP506W | PHOTOTRANSMITTER SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
| OP506D | PHOTOTRANSMITTER SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
| OP506C | PHOTOTRANS SILICON NPN SIDE LOOK | Current Sensors | TT Electronics/Optek Technology |
| OP505W | PHOTOTRANSMITTER SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
| OP505D | PHOTOTRANSISTOR SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
| OP505C | PHOTOTRANSISTOR SILICON NPN T-1 | Current Sensors | TT Electronics/Optek Technology |
