B-Line Eaton series Type 3/3R junction boxes, 16" height, 4" length, 12" width, 3R, Screw cover, RTSC enclosure, Surface mounted, Small single door,

Yes, within limits. The 16124 RTSC carries a NEMA 3R rating, which covers outdoor use against falling rain, sleet and external ice formation. It is not a washdown or hosedown enclosure, so if you are spraying it down or mounting it where wind-driven water or dust is a factor, step up to a 4 or 4X enclosure instead. The cover has a rain hood and plated screws to keep water off the seam and the fasteners from rusting out.

16 inches high, 12 inches wide and 4 inches deep. That 4 inch depth is the number to check first: it is a shallow back box, so if you are stacking a breaker, contactor or DIN rail with terminal blocks in front of it, confirm your deepest device fits under the cover before you order. The box weighs 10.5 lb bare.

There are 5 knockouts in the bottom of the box only. The sides, top and back come blank, so any conduit entering from the side or top has to be field punched, and anything you cut into the top will need to be sealed to hold the 3R rating. Bottom entry is the intended path on a rain-tight enclosure anyway.

It is a surface mount enclosure with embossed thru holes in the back pan. The embossing stands the hole off the mounting surface so water cannot track along the fastener into the box, and the fasteners go through the back rather than through mounting feet. Screws or anchors are sized to the wall, not supplied with the box.

Carbon steel at 16 gauge, painted in ANSI 61 gray. It is a painted steel box, not stainless, so in coastal, chemical or corrosive-wash environments the paint is the only barrier and it will need touch-up where you punch it. The 16 gauge body is stiff enough to carry mounted devices on the back pan without oilcanning.

It is built to UL 50, the standard for enclosures for electrical equipment, and it is made in the United States. That combination is usually what a government, healthcare or education procurement spec is asking for on the submittal.

It is finished in ANSI 61 gray, the standard light gray used across most industrial control and distribution equipment, so it matches typical switchgear and panel lineups. That makes it straightforward to standardize on across a facility without repainting.