The ABS UL94-HB 1551V is available in black, grey and white as standard; four plan sizes, 80×80, 80×40, 60×60 and 40x40mm are all 20mm high, maximum PCB sizes are 74×74, 74×34, 54×54 and 34x34mm respectively.
Four PCB mounts are moulded into the base and the 20mm height gives enough space for board-mounted RJ45, USB and other standard communication interfaces. To simplify access, the snap-fit closure allows repeated opening and closing without tools. There are ventilation slots on all four vertical faces and mounting slots and a 15mm cable knock out in the base.
Environmental sensors monitoring basics such as temperature, humidity and pressure are widely installed, and are now increasingly intelligent sub-systems, with data processing and communications capability embedded on a small PCB. For active components that produce relatively large amounts of waste heat, the 1551V obviously provides excellent airflow for cooling purposes.