Siemens 3VA9243-0JH12 Box Terminal Block NXB 25-185 mm2

Siemens 3VA9243-0JH12 is a TS1.4 box terminal (NXB) accessory for Siemens 3VA molded‑case circuit breakers, delivering three connection points for copper conductors from 25 mm² to 185 mm² (4 AWG to 350 kcmil) and incorporating a built‑in control‑wire voltage tap‑off. Supplied as a three‑unit kit, it provides three independent terminations per package to streamline multi‑pole wiring in control panels and distribution assemblies. The TS1.4 interface and NXB designation indicate its role as a compact terminal block mounted adjacent to the breaker, enabling localized wiring and voltage sensing or control wiring via the integrated tap‑off without requiring separate components. This accessory is used in industrial electrical installations where reliable, space‑efficient terminal connections are needed on 3VA series breakers, aligning with Siemens’ modular approach to distribution accessories for compact panel layouts.