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| PartNumber | OP181 | OP181E | OP181G |
| Description | Infrared Emitters SMD IR EMITTER 940nm LED, 1.9mm | ||
| Manufacturer | TT Electronics | - | - |
| Product Category | Infrared Emitters | - | - |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | - | - |
| Wavelength | 940 nm | - | - |
| Beam Angle | 10 deg | - | - |
| If Forward Current | 20 mA | - | - |
| Vf Forward Voltage | 1.55 V | - | - |
| Power Rating | 1 mW | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Package / Case | SMD-2 | - | - |
| Packaging | Reel | - | - |
| Illumination Color | Infrared | - | - |
| Series | Smart Meter Pair | - | - |
| Brand | Optek / TT Electronics | - | - |
| Lens Shape | Dome | - | - |
| Fall Time | 0.5 us | - | - |
| Moisture Sensitive | Yes | - | - |
| Product Type | IR Emitters (IR LEDs) | - | - |
| Rise Time | 0.5 us | - | - |
| Factory Pack Quantity | 4000 | - | - |
| Subcategory | Infrared Data Communications | - | - |
| Vr Reverse Voltage | 5 V | - | - |