H21A3 Isocom Screw Slotted Optical Switch, Phototransistor Output
- RS Stock No.:
- 453-0836
- Mfr. Part No.:
- H21A3
- Manufacturer:
- Isocom
Bulk discount available
View bulk pricing optionsSubtotal (1 pack of 5 units)*
PHP381.31
(exc. VAT)
PHP427.07
(inc. VAT)
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In Stock
- Plus 105 unit(s) shipping from September 28, 2026
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Units | Per Unit | Per Pack* |
|---|---|---|
| 5 - 20 | PHP76.262 | PHP381.31 |
| 25 - 95 | PHP74.732 | PHP373.66 |
| 100 - 245 | PHP73.236 | PHP366.18 |
| 250 - 1245 | PHP71.77 | PHP358.85 |
| 1250 + | PHP59.068 | PHP295.34 |
*price indicative
- RS Stock No.:
- 453-0836
- Mfr. Part No.:
- H21A3
- Manufacturer:
- Isocom
Specifications
Technical data sheets
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Isocom | |
| Product Type | Slotted Optical Switch | |
| Output Device | Phototransistor | |
| Number of Channels | 1 | |
| Typical Rise Time | 8μs | |
| Typical Fall Time | 50μs | |
| Mount Type | Screw | |
| Package Type | Pin | |
| Number of Pins | 4 | |
| Maximum Operating Temperature | 85°C | |
| Minimum Operating Temperature | -25°C | |
| Height | 11.1mm | |
| Length | 25.7mm | |
| Width | 6.6mm | |
| Standards/Approvals | No | |
| Slot Width | 3mm | |
| Series | H21A | |
| Automotive Standard | No | |
| Select all | ||
|---|---|---|
Brand Isocom | ||
Product Type Slotted Optical Switch | ||
Output Device Phototransistor | ||
Number of Channels 1 | ||
Typical Rise Time 8μs | ||
Typical Fall Time 50μs | ||
Mount Type Screw | ||
Package Type Pin | ||
Number of Pins 4 | ||
Maximum Operating Temperature 85°C | ||
Minimum Operating Temperature -25°C | ||
Height 11.1mm | ||
Length 25.7mm | ||
Width 6.6mm | ||
Standards/Approvals No | ||
Slot Width 3mm | ||
Series H21A | ||
Automotive Standard No | ||
Slotted Optical Switch, H21Ax Series
The H21Ax series from Isocom are a family of photointerrupters. They combine an NPN silicon phototransistor with an IR LED within a polycarbonate package. The package also features mounting tabs for fixing down with screws. With a 3 mm gap, the H21Ax requires an object from opaque to IR to interrupt the connection between the IR LED and sensor.
Suitable applications for the H21Ax slotted interrupters include printers and optoelectronic switches.
Features of the H21Ax slotted interrupters:
IR LED and NPN phototransistor
Single channel
High gain
Opaque polycarbonate package
Ambient light protection
1 mm aperture
3 mm gap from LED and sensor
Moulded mounting tabs for screw fixing
Slotted Optical Switches, Isocom
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