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| PartNumber | OPB891L55 | OPB891L51 | OPB891L51Z |
| Description | Optical Switches, Transmissive, Phototransistor Output Non-RoHS/Non Standard - Consult Factory - NC/NR | Optical Switches, Transmissive, Phototransistor Output Non-RoHS/Non Standard - Consult Factory - NC/NR | Optical Sensors Optical Switches, Transmissive, Phototransistor Output Slotted Opt Switch |
| Manufacturer | TT Electronics | TT Electronics | - |
| Product Category | Optical Switches, Transmissive, Phototransistor Output | Optical Switches, Transmissive, Phototransistor Output | - |
| Slot Width | 3.175 mm | 3.175 mm | - |
| Aperture Width | 1.27 mm | 1.27 mm | - |
| Collector Emitter Voltage VCEO Max | 30 V | 30 V | - |
| Maximum Collector Current | 30 mA | 30 mA | - |
| If Forward Current | 50 mA | 50 mA | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Series | OPB88/89 | OPB88/89 | - |
| Height | 15.75 mm | 15.75 mm | - |
| Length | 18.47 mm | 18.47 mm | - |
| Output Type | Phototransistor | Phototransistor | - |
| Sensing Method | Transmissive, Slotted | Transmissive, Slotted | - |
| Width | 6.35 mm | 6.35 mm | - |
| Brand | Optek / TT Electronics | Optek / TT Electronics | - |
| Number of Channels | 1 Channel | 1 Channel | - |
| Pd Power Dissipation | 100 mW | 100 mW | - |
| Product Type | Optical Switches, Transmissive, Phototransistor Output | Optical Switches, Transmissive, Phototransistor Output | - |
| Subcategory | Optical Switches | Optical Switches | - |
| Vr Reverse Voltage | 2 V | 2 V | - |