Si photodiode


Si photodiode with BNC connector


The S2281 is a Si photodiode sealed in a metal package with a BNC connector. This configuration allows easy connection to Hamamatsu C9329-01 photosensor amplifier. The large photosensitive area makes the S2281 well suited for optical power meters. Hamamatsu also provides E2573 BNC-BNC coaxial cable (length: 1 m) as an option.

- Metal package with BNC connector
- High sensitivity
- High reliability


Photosensitive area φ11.3 mm
Number of elements 1
Package With BNC connector
Package category With BNC connector
Cooling Non-cooled
Reverse voltage (max.) 5 V
Spectral response range 190 to 1100 nm
Peak sensitivity wavelength (typ.) 960 nm
Photosensitivity (typ.) 0.5 A/W
Dark current (max.) 500 pA
Rise time (typ.) 3 μs
Terminal capacitance (typ.) 1300 pF
Noise equivalent power (typ.) 1.8×10-14 W/Hz1/2
Measurement condition Typ. Ta=25 ℃, Photosensitivity: λ=960 nm, Dark current: VR=10 mV, Terminal capacitance: VR=0 V, f=10 kHz, Noise equivalent power: VR=0 V, λ=λp, unless otherwise noted

Spectral response

Dimensional outline (unit: mm)

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