The 1551V1WH is a vented white miniature enclosure from the 1551SNAP family, built for sensors, IoT nodes and other small electronics that need airflow and exposure to the surrounding environment. At a nominal 40 x 40 mm footprint and 20 mm depth, it is the smallest square size in the range, sized for a compact board up to 34 x 34 mm.

The vents protect the electronics inside from harmful contact with hands or tools while still allowing air and moisture to enter, which suits applications such as sensors that must read ambient conditions. The housing is molded in ABS plastic with a UL94 HB flame rating and is designed to meet IP30.

Overall size is listed as 1.57 in x 1.57 in x 0.79 in (40 mm x 40 mm x 20 mm), with a drawing height of 20.30 mm [.80 in] for the assembled enclosure. Four PC board standoffs are molded into the interior and accept #2 self tapping screws; Hammond recommends #2 x 3/16" self tapping screws, sold separately as 1553WTS100 (pack of 100), tightened to a recommended torque of (35-43) ozf.in / (25-30) cN.m. Shipping weight is 0.02 lbs (0.01 kg).

• Assembly hooks on the base
• Wall-mounting slots on the base
• A knockout on the base that can be removed with a screwdriver for wire entry
• Snap-fit closures on base and cover

The part is RoHS and REACH compliant. The same size is also offered as the unvented 1551SNAP1WH. Hammond notes that some chemicals, including acetone, ketones, thread locking compounds and cutting fluids, can damage ABS plastic, so check compatibility before cleaning or modifying the enclosure.