The R100-120-000 is a square 120 mm size with a 100 mm depth in Hammond's R100 Series of Type 4X diecast aluminum enclosures (aluNORM - Watertight, Thick Wall), finished in RAL 7032 beige. It is built for panel builders, OEM engineers and electricians who need a rugged, sealed housing for a P.C. board up to 104.8 mm x 104.8 mm with generous depth for terminals and devices.

The R100-120-000 measures 4.72 in x 4.72 in x 3.94 in (120 mm x 120 mm x 100 mm), matching the ordering table's 120 mm width, 120 mm length and 100 mm depth with lid. It accepts a maximum P.C. board of 104.8 mm x 104.8 mm. Shipping weight is 2 lbs (0.91 kg).

The body is die-cast aluminum to G AI SI 12 / DIN 1775 in a thick-wall, shallow lid and deep body design, coated in textured polyester powder. A standard neoprene gasket resists oil and petrol, and the enclosure is rated IP66, CSA certified and UL Listed Type 4 for use with industrial control equipment, with an operating temperature range of -40ºC to +80ºC (-40ºF to 176ºF). Its part page lists NEMA ratings 1, 4, 4X, 12 and 13.

Hammond's patented single-channel system uses the same threaded enclosure hole both to mount the enclosure and to fasten the lid, keeping lid screws and mounting holes outside the gasket seal and giving more interior space than dual-channel designs. The lid screws are captive stainless steel, and internal mounting shelves along both sides carry blind holes and grounding screws. All three accessories are listed: R501-000-011 external feet, the R507-120-000 inner panel and the R510-000-000 hinge set.

The same size is also offered in RAL 7035 light gray as R100-120-035. The R100-120-000 is RoHS and REACH compliant.