Photo Transistor Coupler is a photoelectric coupler composed of a light-emitting diode and a phototransistor. It uses the photoelectric effect and transistor amplification characteristics to achieve optical isolation and transmission of electrical signals, ensuring stable and reliable signals. Photo Transistor Coupler include two categories: Photo Transistor Coupler (AC) and Photo Transistor Coupler (DC).
| Product | Photo | Package | size(LxWxHmm) | VF (V) | BV CEO (Min) (V) | V CE(SAT) (Max) (V) | IF (mA) | CTR (%) | tr (uS) | tf (uS) | ton (uS) | toff (uS) | Topr (Min) (degC) | Topr (Max) (degC) | Viso (Vrms) | File |
| KL357B-AW |  |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 130~260 | 3 | 4 | - | - | -55 | +110 | 3750 |  |
| KL357F | |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 150~300 | 3 | 4 | - | - | -55 | +110 | 3750 | |
| KL357E | |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 100~200 | 3 | 4 | - | - | -55 | +110 | 3750 | |
| KL357D | |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 200~400 | 3 | 4 | - | - | -55 | +110 | 3750 | |
| KL357C | |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 200~400 | 3 | 4 | - | - | -55 | +110 | 3750 | |
| KL357B | |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 130~260 | 3 | 4 | - | - | -55 | +110 | 3750 | |
| KL357A | |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 80~160 | 3 | 4 | - | - | -55 | +110 | 3750 | |
| KL357 | |
SOP4 | 4.4x4.1x2.0 | 1.2 | 80 | 0.2 | 5 | 50~600 | 3 | 4 | - | - | -55 | +110 | 3750 | |
| KL357NUC | |
SOP4 | 4.4x4.1x2.0 | 1.3 | 60 | 0.35 | 0.5 | 200~400 | 3 | 4 | - | - | -40 | +125 | 3750 | |
