| Breakdown Voltage | Collector to base breakdown voltage with the emitter open. | BVCBO | V |
| Collector to emitter breakdown voltage with the base open. | BVCEO | V | |
| Emitter to collector breakdown voltage with the base open. | BVECO | V | |
| Collector-Emitter Leakage | Collector to emitter current with base open and without radiant incidence. | ICEO | nA |
| Collector-Emitter Voltage | Collector to emitter voltage with base open. | VCEO | V |
| Collector Current | Collector current. | IC | mA |
| Dark Current | Reverse dark current at a given reverse voltage. | IRD | nA |
| Emitter-Collector Voltage | Emitter to collector voltage with base open. | VECO | V |
| Forward Voltage | Voltage between anode and cathode at a specified forward current. | VF | V |
| Forward Current | The current flowing through a diode from anode to cathode. | IF | mA |
| Light Current | Current flowing through a device due to radiant incidence. | IL | mA |
| Photocurrent | Current through a photodiode from cathode to anode due to radiant incidence. | IPH | µA |
| On-State Collector Current | Current flowing from collector due to radiant incidence. | IC (ON) | mA |
| Operating Temperature Range | Temperature range for which operating specifications are valid. | TOPR | °C |
| Output Current | Output current. | IO | mA |
| Output Voltage | Output voltage. | VO | V |
| Logic high output voltage. | VOH | V | |
| Logic low output voltage. | VOL | V | |
| Power Dissipation | Power dissipation. | PD | mW |
| Radiant Intensity | The radiant flux generated per unit solid angle on the axis. | IE | mW/sr |
| Reception Angle | The angle of the cone where the sensitivity is half of that on the optical axis. | 2 θ 1/2 | ° |
| Reverse Current | Current flowing through a diode from cathode and anode. | IR | µA |
| Reverse Voltage | Voltage between cathode and anode at a specified reverse current. | VR | V |
| Saturation Voltage | Collector to emitter saturation voltage. | VCE SAT | V |
| Soldering Temperature | Temperature for lead soldering. | TSOL | °C |
| Temperature for lead soldering with iron. | TSOL-I | °C | |
| Temperature for wave soldering. | TSOL-F | °C | |
| Storage Temperature Range | Temperature range for storage while not in operation. | TSTR | °C |
| Supply Current | Current drawn from the supply at a given voltage. | ICC | mA |
| Supply Voltage | Operating supply voltage. | VCC | V |
| Threshold | Amount of incident light required to turn a device on. | Ee+ | mW/cm2 |
| Amount of incident light required to turn a device off. | Ee– | mW/cm2 | |
| Forward current required to turn a device on. | IF+ | mA | |
| Forward current required to turn a device off. | IF– | mA | |
| Total Output Power | The total optical output power. | PO | mW |
| Viewing Angle | The angle of the cone where the luminous intensity is half of that on the optical axis. | 2 θ 1/2 | ° |