| Power Dissipation Photo Transistor | PC | (mW) | Permissible Power dissipation between collector and emitter |
| Power Dissipation Photo Diode | PD | (mW) | ermissible Power dissipation between Anode and chathode |
| Collector-Emitter Voltage | VCEO | (V) | Direct Voltage between Collector and emitter at base open and light detecting |
| Emitter-Collector Voltage | VECO | (V) | Direct Voltage between emitter and collector at base open and light detecting |
| Reverse Voltage Photo Diode | VR | (V) | Permissible Reverse direct voltage from chathode to Anode at light detecting |
| Light Current Photo Transistor | IC | (μA)(mA) | Direct current to be forwarded to collector at light detecting |
| Light Current Photo Diode | ISC | (nA)(μA) | Direct short current to be forwarded at light detecting |
| Dark Current Photo Transistor | ICEO | (nA)(μA) | Direct current between collector and emitter in dark and at superimposed voltage |
| Dark Current Photo Diode | ID | (nA)(μA) | Direct current forwarded to photodiode in dark and at superimposed voltage in reverse direction |
| Illumination | EV | (lx) | the luminous flux per unit area on an intercepting surface |
| Collector-Emitter Saturation Voltage | VCE(sat) | (V) | Voltage between Collector and emitter at saturated light detecting |
| Peak Spectral response | λp | (nm) | Wavelength which has relative peak sensitivity in sensing wavelength region |
| Half Angle | ⊿θ | (°) | Sensitive angle which becomes over half level of energy detection to that of peak position |
| Low Level Output Voltage | VOL | (V) | Direct Voltage to output at level of output current is low |
| High Level Output Voltage | VOH | (V) | Direct Voltage to output at level of output current is high |
| Low Level Output Current | IOL | (mA) | Direct output current forwarded at superimposed voltage of low level |
| High Level Output Current | IOH | (mA) | Direct output current forwarded at superimposed voltage of high level |
| Low Level Supply Current | ICCL | (mA) | Supply current at drive of low level output current |
| High Level Supply Current | ICCH | (mA) | Supply current at drive of high level output current |
| Response Time Rise Time | tr | (ns)(μs) | Refer to the figure. |
| Response Time Delay Time | td | (ns)(μs) | Refer to the figure. |
| Response Time Fall Time | tf | (ns)(μs) | Refer to the figure. |
| Response Time Storage Time | ts | (ns)(μs) | Refer to the figure. |
| Response Time Propagation Time Low to High | tPLH | (ns)(μs) | Refer to the figure. |
| Response Time Propagation Time High to Low | tPHL | (ns)(μs) | Refer to the figure. |
