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Littelfuse SM712 Series TVS Diode Array is a 600W Asymmetrical TVS diode array designed to protect RS-485 applications with asymmetrical working voltages (-7V to 12V) from damage due to electrostatic discharge (ESD), electrical fast transients (EFT), and lightning induced surges. The SM712 can absorb repetitive ESD strikes above the maximum level specified in the IEC61000-4-2 international standard without performance degradation and safely dissipate up to 19A of 8/20us induced surge current (IEC-61000-4-5) with very low clamping voltages. Features ESD, IEC61000-4-2, ±30kV contact, ±30kV air EFT, IEC61000-4-4, 50A (5/50ns) Lightning, IEC61000-4-5, 19A (tp-8/20μs) Working voltages: -7V to 12V Low clamping voltage Low leakage current AEC-Q101 Qualified Applications RS-485 Fieldbus Modbus Profibus DMX512 Security Systems Automated Teller Machines (ATMs) Automation Equipment Communication Equipment Pinout and Functional Block Diagram 
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