| Part number | H21A3 |
|---|---|
| Datasheet | H21A3_FairchildSemiconductor.pdf |
| File Size | 104.21 KB |
| Manufacturer | Fairchild (now onsemi) |
| Description | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
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The H21A1, H21A2 and H21A3 consist of a gallium arsenide infrared emitting diode coupled with a silicon phototransistor in a plastic housing. The gap in the housing provides a means of interrupting the signal with an opaque material, switching the output from an “ON” to an “OFF” state.
| Brand Logo | Part Number | Description | Other Manufacturers |
|---|---|---|---|
 |
H21A3 | SLOTTED OPTICAL SWITCH | QT Optoelectronics |
 |
H21A3 | Photointerrupters | ISOCOM |
See all Fairchild (now onsemi) datasheets
| Part Number | Description |
|---|---|
| H21A | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A1 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A2 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A4 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A5 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A6 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21B1 | PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH |
| H21B2 | PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH |
| H21B3 | PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH |
| H21B4 | PHOTODARLINGTON OPTICAL INTERRUPTER SWITCH |
