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| PartNumber | HMA121A | HMA121A (PB) | HMA121AR1 |
| Description | Transistor Output Optocouplers Optocoupler Phototransistor | OPTOISO 3.75KV TRANSISTOR 4SMD | |
| Manufacturer | ON Semiconductor | - | Fairchild Semiconductor |
| Product Category | Transistor Output Optocouplers | - | Optoisolators - Transistor, Photovoltaic Output |
| RoHS | Y | - | - |
| Package / Case | SMD-4 | - | - |
| Output Type | NPN Phototransistor | - | Transistor |
| Number of Channels | 1 Channel | - | 1 |
| 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 | Bulk | - | Tape & Reel (TR) |
| Configuration | 1 Channel | - | - |
| Height | 2.19 mm | - | - |
| Length | 4.29 mm | - | - |
| Width | 4.4 mm | - | - |
| Brand | ON Semiconductor / Fairchild | - | - |
| Current Transfer Ratio | 300 % | - | - |
| Product Type | Transistor Output Optocouplers | - | - |
| Factory Pack Quantity | 3000 | - | - |
| Subcategory | Optocouplers | - | - |
| Part # Aliases | HMA121A_NL | - | - |
| Series | - | - | - |
| Package Case | - | - | 4-SMD, Gull Wing |
| Input Type | - | - | DC |
| Operating Temperature | - | - | -40°C ~ 100°C |
| Mounting Type | - | - | Surface Mount |
| Supplier Device Package | - | - | 4-Mini-Flat |
| Current Output Channel | - | - | 80mA |
| Voltage Output Max | - | - | 80V |
| Current DC Forward If Max | - | - | 50mA |
| Voltage Isolation | - | - | 3750Vrms |
| Voltage Forward Vf Typ | - | - | 1.3V (Max) |
| Current Transfer Ratio Min | - | - | 100% @ 5mA |
| Current Transfer Ratio Max | - | - | 300% @ 5mA |
| Turn On Turn Off Time Typ | - | - | - |
| Rise Fall Time Typ | - | - | 3μs, 3μs |
| Vce Saturation Max | - | - | 400mV |