# The H21A1, H21A2 and H21A3 consist of a gallium arsenide infrared emitting diode coupled with a silicon phototransist...

**Manufacturer:** Fairchild Semiconductor  
**MPN:** `H21A3`

## Specifications

| Attribute | Value |
| --- | --- |
| Brand name | Fairchild Semiconductor |
| Manufacturer name | Fairchild Semiconductor |
| Manufacturer | Fairchild Semiconductor |

## Distributor availability

| Distributor | SKU | Price (USD) | Qty | Stock | MOQ |
| --- | --- | --- | --- | --- | --- |
| element14 APAC | 1652522 | 2.04 | 1 | None | 1 |
| Ewing Components | H21A3 |  |  | 7100 | None |
| Digi-Key | 400371 |  |  | None | 1 |

---
Structured data: `/python/html6/product/500/180000000/180163500/part_--H21A3---FairchildSemiconductor--dbd1ac485e.json`  
Search API: https://www.dataalchemy.com/api/  
MCP server: https://www.dataalchemy.com/mcp