Slim DIN Rail Mount RJ9 4P4C 3 Jacks Splitter Buss Board Interface Module. RJ9 4P4C vertical jacks. Rated voltage: 80V. Rated current: 500mA / per pin. Operating Temperature: -20ºC to 70ºC FR-4 fiber glass PCB, dual copper layers. High quality Taiwan DINKLE fireproof nylon material DIN rail mount carrier (not China low quality carrier), can support width 35mm, 25mm or 15mm rail.