The VTD34SMH is a photodiode manufactured by Excelitas that is designed for detections in the visible (400-1100nm) as well as near-infrared (900nm) wavelength range. This particular model is an ultra-sensitive surface-mount device, offering a 30nA dark current and a 25mm² active area. Its robust construction offers ultra-low noise, making it an ideal choice for various applications, including spectroscopy, imaging, and optical communication.