Feed-through terminal block ST-4. 4 mm² nominal cross section. 40 A maximum load current. Spring cage connection method, 10 to 28 AWG. As well as saving space, the compact design and front connection enable user-friendly wiring in a small amount of space. The consistent double function shaft offers every opportunity for time-saving potential distribution and accommodating test accessories. The large wiring space enables the use of conductors with ferrules and plastic collars within the nominal cross section. Tested for railway applications.