The MARATHON/KULKA 411 series single-row terminal blocks offer a versatile solution for various electrical applications. Constructed with a phenolic base and an open-back design, these blocks accommodate 1 to 23 poles, providing flexibility in circuit design. The 1/4" center spacing and compatibility with wire sizes #18-#20 AWG ensure secure connections. Recognized by UL and CSA, these terminal blocks are suitable for a wide range of industrial and commercial uses, including power distribution, control panels, and automation systems. Hardware options are available to suit different mounting and connection requirements.