Datasheet Details
| Part number | H21A5 |
|---|---|
| Manufacturer | Fairchild (now onsemi) |
| File Size | 101.11 KB |
| Description | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| Download | H21A5 Download (PDF) |
|
|
| Part number | H21A5 |
|---|---|
| Manufacturer | Fairchild (now onsemi) |
| File Size | 101.11 KB |
| Description | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| Download | H21A5 Download (PDF) |
|
|
|
The H21A series are gallium arsenide infrared emitting diode coupled with a silicon photodarlington in a plastic housing.
The packaging system is designed to optimize the mechanical resolution, coupling efficiency, ambient light rejection, cost and reliability.
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.
PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH H21A4 PACKAGE DIMENSIONS 0.972 (24.7) 0.957 (24.3) 0.472 (12.0) 0.457 (11.6) C L 0.249 (6.35) 0.243 (6.15) + E D + H21A5 H21A6 Ø 0.133 (3.4) Ø 0.126 (3.2) (2X) C L 0.39 (1.00) 0.34 (0.85) 0.755 (19.2) 0.745 (18.9) 0.129 (3.3) 0.119 (3.0) 0.103 (2.60) NOM 0.433 (11.0) 0.422 (10.7) Optical C L SCHEMATIC 0.125 (3.2) 0.119 (3.0) C L .295 (7.5) .272 (6.9) 0.110 (2.8) 0.091 (2.3) 0.315 (8.0) 1 4 2 1 3 4 PIN 1 ANODE PIN 2 CATHODE PIN 3 COLLECTOR PIN 4 EMITTER 0.020 (0.51) (SQ) 2 3 NOTES: 1.
Dimensions for all drawings are in inches (mm).
2.
| Brand Logo | Part Number | Description | Manufacturer |
|---|---|---|---|
 |
H21A5 | SOLTTED OPTICAL SWITCH | QT Optoelectronics |
| Part Number | Description |
|---|---|
| H21A | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A1 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A2 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A3 | PHOTOTRANSISTOR OPTICAL INTERRUPTER SWITCH |
| H21A4 | 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 |