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| PartNumber | PS2521L-1-E3-A | PS2521L-1-A | PS2521L-1-E4-A |
| Description | Transistor Output Optocouplers Hi-Iso DC Input 1-Ch | Transistor Output Optocouplers Hi-Iso DC Input 1-Ch | |
| Manufacturer | CEL | CEL | - |
| Product Category | Transistor Output Optocouplers | Transistor Output Optocouplers | - |
| RoHS | Y | Y | - |
| Output Type | NPN Phototransistor | NPN Phototransistor | - |
| Number of Channels | 1 Channel | 1 Channel | - |
| If Forward Current | 150 mA | 150 mA | - |
| Maximum Collector Emitter Voltage | 80 V | 80 V | - |
| Maximum Collector Current | 50 mA | 50 mA | - |
| Isolation Voltage | 5000 Vrms | 5300 Vrms | - |
| Maximum Collector Emitter Saturation Voltage | 300 mV | 0.3 V | - |
| Vf Forward Voltage | 1.7 V | 1.7 V | - |
| Vr Reverse Voltage | 6 V | 6 V | - |
| Pd Power Dissipation | 250 mW | 150 mW | - |
| Minimum Operating Temperature | - 55 C | - 55 C | - |
| Maximum Operating Temperature | + 100 C | + 100 C | - |
| Packaging | Reel | Tube | - |
| Configuration | 1 Channel | - | - |
| Brand | CEL | CEL | - |
| Product Type | Transistor Output Optocouplers | Transistor Output Optocouplers | - |
| Factory Pack Quantity | 1000 | 100 | - |
| Subcategory | Optocouplers | Optocouplers | - |
| Package / Case | - | DIP-4 | - |
| Current Transfer Ratio | - | 80 % | - |
| Fall Time | - | 5 us | - |
| Rise Time | - | 3 us | - |