Hammond 1550G 222×146×51 mm Natural Diecast Aluminum Enclosure

The 1550G is a natural-finish diecast aluminum enclosure from the 1550 Series, with a 222 x 146 mm footprint at a 51 mm body height, a wide but low profile (the 1550H shares the footprint at 101 mm tall). The part page lists its size as 8.74 in x 5.75 in x 2.01 in (222 mm x 146 mm x 51 mm). It suits electronics designers, OEM engineers and hobby builders who need a rugged, easy-to-machine metal box for instruments, control circuits or stomp-box style projects.

Usable space per the drawing is 215.46 mm [8.48 in] long, 139.46 mm [5.49 in] wide and 51.10 mm [2.01 in] high, suiting a larger flat circuit board with low-height components. The series ordering table lists this size as 8.74 in (222 mm) long, 5.75 in (146 mm) wide and 2.17 in (55 mm) high, a figure that includes the 4 mm (0.16 in) lid; the drawing shows 55.10 mm [2.17 in] overall with the lid fitted. Shipping weight is 1.3 lbs (0.59 kg).

Die-cast aluminum alloy is tough yet easy to machine, and the unpainted body is vibra finished for a smooth surface with no sharp edges. Lap joint construction protects against dust and splashing water. Four M3.5 x 0.6 x 12 mm stainless steel Philips head machine screws hold the lid in factory tapped holes. Smooth, rib-free internal walls make fitting connectors straightforward, and a low side wall draft angle (2° less) helps with PC board mounting.

As supplied, without a gasket, the 1550G is rated IP54. Adding the 1550GEGASKET EVA foam gasket kit brings it to IP66, and the 1550GSGASKET silicone kit is the IP67 upgrade (with properly installed gasket and lid screws torqued at 55 cN.m). The same size in black powder coat is the 1550GBK, and the version shipped with an IP66 gasket is the 1550WG. It is RoHS and REACH compliant and ships in shrink wrap.