v_shortname: Zener barrier, device offers intrinsically safe circuits for device protection level: Ga , Gb , Gc , Da , Db , Dc , Ma , Mb, device suitable for installation in device protection level: Gc, device offers intrinsically safe circuits for division: Div. 1 , Div. 2, device suitable for installation in division: Div. 2, type: AC version, number of channels: 3, supply circuit: max. 3.7 V, measuring circuit: max. 0.6 V at 1 µA, nominal resistance: 12 O, series resistance: max. 27.27 O, nominal fuse current: 50 mA, design: modular terminal housing , see system description, mounting: on 35 mm top hat rail according to EN 60715:2001