| PartNumber | OPB821 | OPB821S3 | OPB821S3Z |
| 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 Switches, Transmissive, Phototransistor Output Slotted Opt Switch |
| Manufacturer | TT Electronics | TT Electronics | TT Electronics |
| Product Category | Optical Switches, Transmissive, Phototransistor Output | Optical Switches, Transmissive, Phototransistor Output | Optical Switches, Transmissive, Phototransistor Output |
| Slot Width | 2.03 mm | 2.03 mm | 2.03 mm |
| Collector Emitter Voltage VCEO Max | 30 V | 30 V | 30 V |
| If Forward Current | 50 mA | 50 mA | 20 mA |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Height | 8.89 mm | 8.89 mm | 8.89 mm |
| Length | 15.24 mm | 15.24 mm | 15.24 mm |
| Output Type | Phototransistor | Phototransistor | Phototransistor |
| Sensing Method | Transmissive, Slotted | Transmissive, Slotted | Transmissive, Slotted |
| Wavelength | 890 nm | 890 nm | 890 nm |
| Width | 6.35 mm | 6.35 mm | 6.35 mm |
| Brand | Optek / TT Electronics | Optek / TT Electronics | Optek / TT Electronics |
| Number of Channels | 1 Channel | 1 Channel | 1 Channel |
| Pd Power Dissipation | 100 mW | 100 mW | 100 mW |
| Product Type | Optical Switches, Transmissive, Phototransistor Output | Optical Switches, Transmissive, Phototransistor Output | Optical Switches, Transmissive, Phototransistor Output |
| Subcategory | Optical Switches | Optical Switches | Optical Switches |
| Vr Reverse Voltage | 2 V | 2 V | 2 V |
| RoHS | - | - | Y |
| Aperture Width | - | - | 0.762 mm |
| Mounting Style | - | - | Wire Leads |
| Packaging | - | - | Bulk |
| Sensing Distance | - | - | 2.03 mm |
| Factory Pack Quantity | - | - | 100 |