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| PartNumber | HMA121R1 | HMA121R1V | HMA121R2 |
| Description | Transistor Output Optocouplers Optocoupler Phototransistor | OPTOISO 3.75KV TRANSISTOR 4SMD | OPTOISO 3.75KV TRANSISTOR 4SMD |
| Manufacturer | ON Semiconductor | - | - |
| Product Category | Transistor Output Optocouplers | - | - |
| RoHS | Y | - | - |
| Package / Case | SMD-4 | - | - |
| Output Type | NPN Phototransistor | - | - |
| Number of Channels | 1 Channel | - | - |
| If Forward Current | 50 mA | - | - |
| Maximum Collector Emitter Voltage | 80 V | - | - |
| Maximum Collector Current | 80 mA | - | - |
| Isolation Voltage | 3750 Vrms | - | - |
| Maximum Collector Emitter Saturation Voltage | 0.4 V | - | - |
| Vf Forward Voltage | 1.3 V | - | - |
| Vr Reverse Voltage | 6 V | - | - |
| Pd Power Dissipation | 150 mW | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 100 C | - | - |
| Packaging | Reel | - | - |
| Configuration | 1 Channel | - | - |
| Height | 2.19 mm | - | - |
| Length | 4.29 mm | - | - |
| Width | 4.4 mm | - | - |
| Brand | ON Semiconductor / Fairchild | - | - |
| Current Transfer Ratio | 600 % | - | - |
| Product Type | Transistor Output Optocouplers | - | - |
| Factory Pack Quantity | 1000 | - | - |
| Subcategory | Optocouplers | - | - |
| Part # Aliases | HMA121R1_NL | - | - |