The 1453N is the largest 1453 heavy duty vented steel instrument enclosure, 12 in high, 12 in wide and 19 in deep (305 x 305 x 483 mm), for big power supplies and other heavy, heat producing equipment. Its drawing specifies a 14 gauge steel base. It is intended for electronics builders, OEM engineers and test or lab teams who need an all-steel case that manages heat.

Construction is all steel and heavy duty. The drawing specifies a 14 gauge steel base and an 18 gauge steel cover vented for cooling. The top half is an upside down U shape for easy removal; the bottom half is also U shaped with a fold on all sides, including front and back, for extra strength and for mounting the top case. The heavily ventilated top has a slant that also serves as a lifting area at the front and back. The part listing gives the colour as gray, while the series sheet and drawing describe a beige powder coat.

The ordering table lists the 1453N at 12.00 in (305 mm) high, 12.00 in (305 mm) wide and 19.00 in (483 mm) deep. The top lip extends 0.75 in (19 mm) on both sides, adding 1.5 in (38 mm) to the total depth, and the drawing shows 520.70 mm [20.500 in] overall with an inside length of 478.81 mm [18.851 in]. Shipping weight is 11.02 lbs (5.00 kg), boxed.

The bottom is solid except for four holes for the heavy duty rubber feet. The assembly includes base, cover, nickel plated #8-32 x 1/4 in self-tapping cover screws (Pkg 18), four 0.75 in (19 mm) screw-on rubber feet (1421T7) and #8-32 x 3/8 in feet screws. Recommended cover screw torque is 14-15 lbf-in (160-170 cN-m). Factory modification and .stp or .x_t solid models are available, and it is RoHS and REACH compliant.