| Image | Part Number | Manufacturer | Description | Series | Operating Temperature | Packaging | Mounting Type | RoHS Status | Manufacturer Part Number | Contact Material | Viewing Angle | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BPX 43-4 | OSRAM Opto Semiconductors, Inc. | PHOTOTRANSISTOR NPN 880NM TO-18 | - | -40°C ~ 125°C (TA) | Bulk | Through Hole | - | - | - | 30° | TO-206AA, TO-18-3 Metal Can | |
| PNA1801LS0NC | Panasonic | NPN PHOTOTRANS 850NM T1 | - | - | - | Through Hole | - | - | - | 60° | T-1 | |
| VEMT2523SLX01 | Electro-Films (EFI) / Vishay | NPN PHOTO TRANSISTOR SMD SIDE LO | Automotive, AEC-Q101 | -40°C ~ 100°C (TA) | Cut Tape (CT) | Surface Mount, Right Angle | - | - | - | 70° | 2-SMD, Side View | |
| LPT 80A | OSRAM Opto Semiconductors, Inc. | PHOTOTRANS NPN 850NM SIDELOOKER | - | -40°C ~ 100°C (TA) | Bulk | Through Hole | - | - | - | 70° | Radial | |
| PT91-21C | Everlight Electronics | PHOTOTRANSISTOR 1.9MM RND AXIAL | - | -25°C ~ 85°C (TA) | Bulk | Through Hole | - | - | - | - | Axial | |
| OP520DA | Optek Technology / TT Electronics | PHOTODARLINGTON NPN BLK 1206 SMD | - | -25°C ~ 85°C (TA) | Tape & Reel (TR) | Surface Mount | - | - | - | 150° | 1206 (3216 Metric) | |
| SFH 303 FA-3/4 RN23C | OSRAM Opto Semiconductors, Inc. | PHOTOTRANS T1 3/4 5MM NPN | - | - | Bulk | Through Hole | - | - | - | 40° | T 1 3/4 | |
| QSB363 | AMI Semiconductor / ON Semiconductor | IC PHOTOTRANS IR 940NM BLK 1.9MM | - | -40°C ~ 85°C (TA) | Bulk | Surface Mount | - | - | - | 24° | Axial | |
| LTR-3208E | Lite-On, Inc. | PHOTOTRAN NPN 5MM IR DARK | - | -40°C ~ 85°C (TA) | Bulk | Through Hole | - | - | - | 20° | Radial | |
| PT91-21B/TR10 | Everlight Electronics | PHOTOTRANS 1.9MM RND BLACK ZBEND | - | -25°C ~ 85°C (TA) | Tape & Reel (TR) | Surface Mount | - | - | - | - | 2-SMD, Z-Bend |
Phototransistors are semiconductor devices that convert light energy into electrical signals. They consist of a semiconductor junction and a transparent window that allows light to enter and interact with the semiconductor material. Phototransistors amplify the current generated by incident light, making them suitable for applications requiring high sensitivity to light levels, such as optical encoders, ambient light sensing, and infrared remote control systems.