Hammond 1557D2BK 120mm Square, 45mm Black Polycarbonate NEMA Box

The 1557D2BK is a black, UL listed polycarbonate enclosure measuring 4.72 in x 4.72 in x 1.77 in (120 mm x 120 mm x 45 mm). It is the low-profile 120 mm square option in the 1557 Series for integrators and OEMs who need to put a printed circuit board or small control assembly outdoors or in washdown areas.

The polycarbonate is UV stabilized for outdoor use. The series lists independent testing to IP66, IP67 and IP68 and NEMA Type 4, 4X, 6, 6P, 12 and 13, with cUL and UL 508A listing under file E65324 and an IK08 impact rating per IEC 62262:2021. The part page lists a UL94 V-0 flame rating, while the drawing notes the material as UL94-5VA at 3 mm. Recommended operating temperature is -40°C to +110°C (-40°F to +230°F); the manufacturer advises customers to test suitability for their application.

A two piece tongue and groove lid with a one piece high temperature UL listed silicone gasket is fastened by four stainless steel M4-0.7 x 20 mm screws into corrosion resistant bushings (71-85 ozf-in, 50-60 cN-m). Inside you get 111.02 mm x 111.02 mm [4.37 x 4.37 in] with 38.80 mm [1.53 in] of height, and the maximum PC board is 108.5 mm x 108.5 mm on bosses that accept #6 self-tapping screws.

The 1557D2BK includes four rubber feet, four wall mount feet and four foot screws for tabletop, flush wall or heavy duty wall flange mounting; polycarbonate feet install at 100 - 110 cN-m (8.8 - 9.7 lbf-in). Pole mount kits PMB5057KIT3 (7 in max) and PMB5057KIT4 (15 in max) are listed for this profile. Shipping weight is 0.48 lbs (0.22 kg).