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| Part Number | PT91-21B |
| Datasheet | PT91-21B datasheet |
| Description | PHOTOTRANSISTOR 1.9MM RND BK AXL |
| Manufacturer | Everlight Electronics Co Ltd |
| Series | - |
| Part Status | Active |
| Voltage - Collector Emitter Breakdown (Max) | 30V |
| Current - Collector (Ic) (Max) | 20mA |
| Current - Dark (Id) (Max) | 100nA |
| Wavelength | 940nm |
| Viewing Angle | - |
| Power - Max | - |
| Mounting Type | Through Hole |
| Orientation | Top View |
| Operating Temperature | -25°C ~ 85°C (TA) |
| Package / Case | Axial, Flat Leads |