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| PartNumber | LED55BF | LED55B | LED55B/LED56 |
| Description | Infrared Emitters 3.5mW 1.7V IR LED | Infrared Emitters 5.4mW 1.7V IR LED | |
| Manufacturer | ON Semiconductor | ON Semiconductor | - |
| Product Category | Infrared Emitters | Infrared Emitters | - |
| RoHS | Y | Y | - |
| Mounting Style | Through Hole | Through Hole | - |
| Wavelength | 940 nm | 940 nm | - |
| Beam Angle | 40 deg | 10 deg | - |
| If Forward Current | 100 mA | 100 mA | - |
| Vf Forward Voltage | 3 V | 3 V | - |
| Power Rating | 1.3 W | 1.3 W | - |
| Minimum Operating Temperature | - 65 C | - 65 C | - |
| Maximum Operating Temperature | + 125 C | + 125 C | - |
| Package / Case | TO-46 | TO-46 | - |
| Packaging | Bulk | Bulk | - |
| Height | 3.94 mm | 6.48 mm | - |
| Illumination Color | Infrared | Infrared | - |
| Length | 5.31 mm | 5.31 mm | - |
| Width | 5.31 mm | 5.31 mm | - |
| Brand | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild | - |
| Viewing Angle | 40 deg | 8 deg | - |
| Product Type | IR Emitters (IR LEDs) | IR Emitters (IR LEDs) | - |
| Factory Pack Quantity | 500 | 500 | - |
| Subcategory | Infrared Data Communications | Infrared Data Communications | - |
| Vr Reverse Voltage | 3 V | 3 V | - |