Silicon Photomultipler - SiPM - 3x3 mm
Brand Hamamatsu MPPC
Model S14160-3050HS
View manufacturer website for full specs
Breakdown voltage (V_BR) is 38 V +/- 0.2 V
Recommended operating voltage = V_BR +/- 2.7 V
New, unused, shipped in antistatic bag inside small plastic case