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| PartNumber | OPB991T55 | OPB991T51Z | OPB991T55Z |
| Description | Optical Switches, Transmissive, Photo IC Output Non-RoHS/Non Standard - Consult Factory - NC/NR | Optical Switches, Transmissive, Photo IC Output Slotted Opt Switch Photologic | Optical Sensors Optical Switches, Transmissive, Photo IC Output Slotted Opt Switch Photologic |
| Manufacturer | TT Electronics | TT Electronics | - |
| Product Category | Optical Switches, Transmissive, Photo IC Output | Optical Switches, Transmissive, Photo IC Output | - |
| Slot Width | 3.18 mm | 3.18 mm | - |
| Aperture Width | 1.27 mm | 1.27 mm | - |
| If Forward Current | 40 mA | 40 mA | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Series | OPB9 | OPB9-Z | - |
| Height | 15.63 mm | 15.63 mm | - |
| Length | 24.64 mm | 24.64 mm | - |
| Output Type | Open Collector, Buffer | Open Collector, Buffer | - |
| 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 | - | - |
| Fall Time | 70 ns | 70 ns | - |
| Pd Power Dissipation | 300 mW | 300 mW | - |
| Product Type | Optical Switches, Transmissive, Photo IC Output | Optical Switches, Transmissive, Photo IC Output | - |
| Rise Time | 70 ns | 70 ns | - |
| Subcategory | Optical Switches | Optical Switches | - |
| Vr Reverse Voltage | 2 V | 2 V | - |
| RoHS | - | Y | - |
| Packaging | - | Bulk | - |
| Wavelength | - | 890 nm | - |
| High Level Output Current | - | 100 uA | - |
| Low Level Output Voltage | - | 0.4 V | - |
| Factory Pack Quantity | - | 100 | - |
| Vf Forward Voltage | - | 1.7 V | - |