H21B1 Opto - CASE: DIP4 MAKE: Fairchild Semiconductor
Gallery
Attributes
Distributor offers
| Seller | SKU | MOQ | In stock | Multiple | Prices |
|---|---|---|---|---|---|
| Little Diode | H21B1 | 1 | 17 | 1 | 1 @ $17.82 |
| Win Source | H21B1 | 60 | 8470 | 60 | 60 @ $0.57, 250 @ $0.53, 680 @ $0.50 |
| Hotenda | H3942897 | 1 | 1 | ||
![]() Radwell | H21B1 | 1 | 1 | 1 @ $2.47 | |
| H21B1 | 1 | 1 | |||
| Component Electronics | 246-50 | 1 | 1 | ||
![]() Newark | 72K8668 | 700 | 700 | 1 @ $0.00 | |
| Digi-Key | 20677 | 1 | 1 |
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Fairchild H21B1 Optical Interrupter
Brand: Fairchild
The popular H21B1 part consists of a gallium arsenide infrared emitting diode coupled with a silicon photodarlington in a plastic housing with attachment ears. 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. The B1 part has On-State Collector Current = 7.5mA @ IF = 10 mA, VCE = 1.5 V.
Details
- Fairchild Optical Interrupter Model # H21B1
- On-State Collector Current = 7.5mA @ IF = 10 mA, VCE = 1.5 V.
- Gallium arsenide infrared emitting diode coupled with a silicon photodarlington
- Interrupting the signal with an opaque material switches state
- Nominal Gap Size: 3.15mm, Response Time: 120us
Listing
| Product group | BISS |
|---|---|
| Product type | ELECTRONIC_COMPONENT |
| Model | H21B1 |
| Part number | H21B1 |
| Items per pack | 1 |
| Label | Fairchild |
| Manufacturer | Fairchild |
Catalog
| Feature | Fairchild Optical Interrupter Model # H21B1 |
|---|---|
| Category | Industrial & Scientific |
| MPN | H21B1 |
| Product group | BISS |
| Product type | ELECTRONIC_COMPONENT |
| Manufacturer | Fairchild |
3 Fairchild H21B1 Photodarlington Optical Interupter Switches
Brand: Fairchild
Fairchild H21B1.0088K (Attached 3p .100" Header Plug) Photodarlington Optical Interupter Switches Quantity: 3 GoldenO Part# 0621 Inventory Class New Old Stock Manufacturer Fairchild Part Number H21B1.0088K (Attached 3p .100" Header Plug) Date Code A0810 Specifications See Product Data Sheet Product Data Sheet Data Sheet 40/ 2oz PE
Listing
| Product group | BISS |
|---|---|
| Product type | BISS |
| Part number | H21B1 |
| Items per pack | 3 |
| Label | Fairchild |
| Manufacturer | Fairchild |
Catalog
| Category | Industrial & Scientific |
|---|---|
| MPN | H21B1 |
| Product group | BISS |
| Product type | BISS |
| Manufacturer | Fairchild |

