S12271Si PIN photodiode

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Large area, high-speed PIN photodiode for UV to near IR photometry


The S12271 is a high-speed Si PIN photodiode having a large photosensitive area of φ4.1 mm. Using quartz glass as the light input window, this photodiode delivers high sensitivity extending to the UV region and is suitable for optical power meters.


-Quartz glass window
-High UV sensitivity
-Large photosensitive area: φ4.1 mm
-High-speed response: 60 MHz (VR=100 V)

Photosensitive area

φ4.1 mm

Number of elements




Package category


Reverse voltage (max.)

120 V

Spectral response range

190 to 1100 nm

Peak sensitivity wavelength (typ.)

960 nm

Photosensitivity (typ.)

0.5 A/W

Dark current (max.)

30000 pA

Cutoff frequency (typ.)

60 MHz

Terminal capacitance (typ.)

10 pF

Measurement condition

Ta=25 ℃, Typ., unless otherwise noted,
Photosensitivity: λ=960 nm, Dark current: VR=100 V, Cutoff frequency: VR=100 V, Terminal capacitance: VR=100 V, f=1 MHz

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