BPW21R Datasheet PDF – Silicon PN Photodiode

Part Number: BPW21R

Function: Photo Darlington Transistor for optical sensors with high sensitivity

Package: TO-5 Case Type

Manufacturer: Vishay Semiconductors


BPW21R datasheet



The BPW21R is a planar Silicon PN photodiode in a hermetically sealed short TO-5 case, especially designed for high precision linear applications. Due to its extremely high dark resistance, the short circuit photocurrent is linear over seven decades of illumination level.

On the other hand, there is a strictly logarithmic correlation between open circuit voltage and illumination over the same range.



1. Package type: leaded

2. Package form: TO-5

3. Dimensions (in mm): Ø 8.13

4. Radiant sensitive area (in mm2): 7.5

5. High photo sensitivity

6. Adapted to human eye responsivity

7. Angle of half sensitivity: ϕ= ± 50°

8. Hermetically sealed package

9. Cathode connected to package

10. Flat glass window

11. Low dark current

12. High shunt resistance

13. High linearity

14. Compliant to RoHS Directive 2002/95/EC and in accordance with WEEE 2002/96/EC


1. Sensor in exposure and color measuring purposes

Other data sheets are available within the file: BPW21

BPW21R Datasheet PDF Download

BPW21R pdf