The 1551TTTBU is a translucent blue general purpose ABS plastic miniature hand held enclosure measuring 60 x 60 x 15 mm (2.36 x 2.36 x 0.59 in) including the lid. It is aimed at OEM engineers, hobbyists and product designers who need a compact housing for a small printed circuit board or a ready-made box for potting electronics.

At 60 x 60 mm and just 15 mm deep including the lid, this is the slim version of the 60 mm square footprint in the 1551 range, suited to compact square boards up to 54 x 54 mm. Inside, the box measures 56.00 x 56.00 mm [2.20 x 2.20 in], and the drawing gives a maximum PC board size of 54.04 x 54.04 mm [2.13 x 2.13 in]. PC board standoffs are molded into the interior and accept #2 self-tapping screws; the recommended board screw is #2 x 3/16", which is not included.

The box is molded in translucent blue ABS and the lid is held by two #4 x 1/2" self-tapping screws, black plated to match. Recommended screw torque is 35-43 ozf.in (25-30 cN.m). The same size is offered as 1551TTBK, 1551TTGY in the other colours.

Walls are 2 mm (0.08") thick and the lap joint between box and lid protects against dust and splashing water; the enclosure is designed to meet IP54 and carries a UL94 HB flame rating. The 1551TTTBU is RoHS and REACH compliant, ships in a bag with the box, lid and 2 cover screws, and has a shipping weight of 0.05 lbs (0.02 kg). Some chemicals, such as acetone, thread-locking compounds and cutting fluid, can damage ABS, so check compatibility before use.