| H21B1 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H21B2 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H21B3 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H21B4 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H21B5 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H21B6 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H22B1 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H22B2 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H22B3 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H22B4 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H22B5 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
| H22B6 | 5V, 50mA opto-electronic single channel slotted interrupter switch with darlington sensor in 4-pin -- package. Operational temperature range from -25°C to 85°C. | Datasheet*) |
There are other manufacturers for this components. For more information please check
H21B1 (Fairchild Semiconductor)
H21B1 (GESS)
H21B1 (QT)
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