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| PartNumber | QEC121 | QEC122 | QEC121/QEC122/QEC123 |
| Description | Infrared Emitters T1 A1GaAS LED 27mW | Infrared Emitters T1 A1Ga AS LED 39mW | |
| Manufacturer | ON Semiconductor | ON Semiconductor | - |
| Product Category | Infrared Emitters | Infrared Emitters | - |
| RoHS | Y | Y | - |
| Mounting Style | Through Hole | Through Hole | - |
| Wavelength | 880 nm | 880 nm | - |
| Beam Angle | 16 deg | 16 deg | - |
| Vf Forward Voltage | 1.7 V | 1.7 V | - |
| Power Rating | 100 mW | 100 mW | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 100 C | + 100 C | - |
| Package / Case | T-1 (3 mm) | T-1 (3 mm) | - |
| Packaging | Bulk | Bulk | - |
| Height | 5.66 mm | 5.66 mm | - |
| Illumination Color | Infrared | Infrared | - |
| Length | 3.94 mm | 3.94 mm | - |
| Series | QEC121 | QEC122 | - |
| Width | 3.94 mm | 3.94 mm | - |
| Brand | ON Semiconductor / Fairchild | ON Semiconductor / Fairchild | - |
| Viewing Angle | 18 deg | 18 deg | - |
| Lens Dimensions | 2.95 mm x 2.95 mm x 4.9 mm | 2.95 mm x 2.95 mm x 4.9 mm | - |
| Product Type | IR Emitters (IR LEDs) | IR Emitters (IR LEDs) | - |
| Factory Pack Quantity | 250 | 250 | - |
| Subcategory | Infrared Data Communications | Infrared Data Communications | - |
| Vr Reverse Voltage | 5 V | 5 V | - |
| Unit Weight | 0.004698 oz | 0.004698 oz | - |
| If Forward Current | - | 50 mA | - |
| Lens Shape | - | Circular | - |
| Part # Aliases | - | QEC122_NL | - |