Hammond 1551STBU 50x50x15mm Translucent Blue ABS Miniature Enclosure

The 1551STBU is a translucent blue, low-profile 50 x 50 x 15 mm enclosure in the 1551 series. The tinted clear ABS lets indicator lights or the board itself be seen, while the 10.99 mm inside height keeps the package thin. It takes a PC board up to 44 x 44 mm.

The body is molded from general purpose ABS plastic with 2 mm (0.08 in) walls and carries a UL94 HB flame rating. Lap joint construction between box and lid protects against dust and splashing water, and the enclosure is designed to meet IP54. PC board mounting bosses are molded into the interior and accept #2 self-tapping screws.

Outside, the 1551STBU measures 1.97 in x 1.97 in x 0.59 in (50 mm x 50 mm x 15 mm). Inside dimensions are 45.12 mm [1.78 in] long, 45.12 mm [1.78 in] wide and 10.99 mm [0.43 in] high. The maximum PC board size is 44 mm x 44 mm, and the shipping weight is 0.04 lbs (0.02 kg).

Each assembly includes the box, the lid and 2 self-tapping #4 x 1/2" cover screws, black plated to match the enclosure; the recommended torque is 35-43 ozf.in (25-30 cN.m). Screws for securing the PC board are not included; the drawing lists part 1551ATS100 (#2 x 3/16" self-tapping (4.8 mm), pack of 100). The part is RoHS and REACH compliant and ships in a bag.

Hammond notes that some chemicals can damage or weaken ABS, including acetone, ketones, thread-locking compounds and cutting or tapping fluids, so check compatibility before cleaning or modifying. The enclosure can be factory modified (milling, drilling, printing) and solid models are available in .stp or .x_t format.