The A203504 is a 4-pole, single-row terminal block from the A2000 series, featuring a standard barrier and non-feed-thru terminals on a closed base. It is rated for 30A and 300V, accommodating a copper wire range of #12-22 AWG. The block includes #6-32 zinc-plated philslot screws with a torque rating of 9 lb-in and has a center-to-center spacing of 0.375 inches. Constructed from black, UL 94V0 rated thermoplastic, it operates reliably in temperatures from -40°C to 105°C, making it suitable for various industrial power and control circuit applications.