Saelig Company, Inc.
Saelig Company, Inc. is a New York State corporation operating as a Sales and Marketing Agent and……...

Quadrant photodiodes from First Sensor are discrete components that commonly feature four optically active areas divided by a small gap. These photodiodes are designed to detect the position of laser beams, in collimators and a number of other adjustment applications.
Special Features
Small gap areas
High resolution
Low dark current
High shunt resistance
A special version for 1064 nm is also available

Image Credit: First Sensor
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Series 6 – Low Dark Current
Technical Specifications and PDF Datasheet
| Order # | Chip | Package | Active Area Size (mm) / Area (mm²) | Gap (µm) | Dark current (nA); 10 V | Capacitance (pf); 10 V | Rise time (ns); 850 nm, 10 V, 50 Ω |
|---|---|---|---|---|---|---|---|
| 501222 | QP1-6 | TO52 | Ø 1.13 / 4x0.25 | 16 | 0.1* | 1 | 20 |
| 500142 | QP50-6 | TO8S | Ø 7.8 / 4x12.5 | 42 | 2.0* | 25 | 40 |
| 501276 | QP100-6 | LCC10G | 10x10 / 4x25 | 50 | 4.0* | 50 | 40 |
* per segment
Series Q – for 1064 nm
Technical Specifications and PDF Datasheet
| Order # | Chip | Package | Active Area Size (mm) / Area (mm²) | Dark current (nA); 150 V | Rise time (ns); 1064 nm, 180 V, 50 Ω |
|---|---|---|---|---|---|
| 501049 | QP22-Q | TO8S | Ø 5.3 / 4×5.7 | 1.5* | 12 |
| 501526 | QP45-Q | TO8Si with heater | 6.7×6.7 / 4×10.96 | 8* | 12 |
| 501272 | QP100-Q | LCC10G | 10×10 / 4×25 | 6.5* | 12 |
| 50079803 | QP154-Q | TO1032i | Ø 14.0 / 4×38.5 | 10* | 12 |
| 50131304 | QP154-Q | TO1081i with heater | Ø 14.0 / 4×38.5 | 10* | 12 |
| 50131305 | QP154-Q | TO1081i with heater | Ø 14.0 / 4×38.5 | 10* | 12 |
* per segment
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