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| PartNumber | PS2521L-1-F3-A | PS2521L-1-E3-A | PS2521L-1-A |
| Description | Transistor Output Optocouplers BV= 5000Vr.m.s. Creep 7mm Min. | Transistor Output Optocouplers Hi-Iso DC Input 1-Ch | Transistor Output Optocouplers Hi-Iso DC Input 1-Ch |
| Manufacturer | CEL | CEL | CEL |
| Product Category | Transistor Output Optocouplers | Transistor Output Optocouplers | Transistor Output Optocouplers |
| RoHS | Y | Y | Y |
| Output Type | NPN Phototransistor | NPN Phototransistor | NPN Phototransistor |
| Number of Channels | 1 Channel | 1 Channel | 1 Channel |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5300 Vrms |
| Packaging | Reel | Reel | Tube |
| Brand | CEL | CEL | CEL |
| Product Type | Transistor Output Optocouplers | Transistor Output Optocouplers | Transistor Output Optocouplers |
| Factory Pack Quantity | 2000 | 1000 | 100 |
| Subcategory | Optocouplers | Optocouplers | Optocouplers |
| If Forward Current | - | 150 mA | 150 mA |
| Maximum Collector Emitter Voltage | - | 80 V | 80 V |
| Maximum Collector Current | - | 50 mA | 50 mA |
| 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 |
| Configuration | - | 1 Channel | - |
| Package / Case | - | - | DIP-4 |
| Current Transfer Ratio | - | - | 80 % |
| Fall Time | - | - | 5 us |
| Rise Time | - | - | 3 us |