Si photodiode S12742 series Photodiode with a filter for monochromatic light (220, 254, 275 nm) detection The S12742 series uses an interference filter for its window and is sensitive only to monochromatic light. The series consists of three types with different center sensitively wavelengths: 220 nm, 254 nm, and 275 nm. The spectral response half width (FWHM) is extremely narrow at 10 nm (typ.), allowing accurate photometry with little stray light. The S12742 series can be customized to support other peak sensitivity wavelengths such as 340 nm and 560 nm. With monochromatic light filter Water quality and atmosphere analysis Narrow spectral response half width (FWHM): 10 nm typ. UV monitors (mercury lamp, etc.) Structure Parameter Package Photosensitive area Absolute maximum ratings Parameter Reverse voltage Operating temperature Storage temperature Symbol VR max Topr Tstg *1: When there is a temperature difference between a product and the surrounding area in high humidity environment, dew condensation may occur on the product surface. Dew condensation on the product may cause deterioration in characteristics and reliability. Note: xceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the E product within the absolute maximum ratings. Electrical and optical characteristics (Ta=25 °C) Spectral response Photosensitivity half width S FWHM λ=CWL Shunt Terminal Noise equivalent Dark current Rise time capacitance resistance power temperature tr Rsh Ct NEP coefficient VR=0 V VR=0 V VR=10 mV VR=0 V TCID RL=1 kΩ f=10 kHz Min. Typ. λ=λp (times/°C) (µs) (pF) (GΩ) (GΩ) (W/Hz1/2) 3.3 × 10-13 1.12 1 500 0.4 5 9.1 × 10-14 2.0 × 10-13

10 rk current vs. reverse voltage Terminal capacitance vs. reverse voltage Dark current vs. reverse voltage Terminal capacitance vs. reverse voltage Terminal capacitance Dark current

nal outline (S2684 series, unit: mm) Photosensitive surface Dimensional outline (unit: mm) Tolerance unless otherwise noted: ±0.2 Case Distance from photosensitive area center to cap center -0.3≤X≤+0.3 -0.3≤Y≤+0.3 The glass window may extend a maximum of 0.2 mm above the upper surface of the cap. KSPDA0205EA

Precautions against UV light exposure ∙ When UV light irradiation is applied, the product characteristics may degrade. Such examples include degradation of the product’s UV sensitivity and increase in dark current. This phenomenon varies depending on the irradiation level, irradiation intensity, operating time, and operating environment and also varies depending on the product model. Before employing the product, we recommend that you check the tolerance under the ultraviolet light environment that the product will be used in. ∙ Exposure to UV light may cause the characteristics to degrade due...