MDD SM712
The SM712 transient voltage suppressor (TVS) diode is designed for asymmetrical (12V to -7V) protection in multi-point data transmission standard RS-485 applications. The SM712 may be used to protect devices from transient voltages resulting from electrostatic discharge (ESD), electrical fast transients (FET), and lightning. The SM712 features 400 Watts (tp=8/20μs) of power handling capability to accommodate the higher transient voltage levels which may be expected in extended common mode applications.DESCRIPTION
This provides higher equipment reliability and eliminates the “ guess work” required when using zener diodes that are not rated to handle such transient conditions. The integrated design aids in reducing voltage over-shoot associated with trace inductance. The low clamping voltage of the SM712 minimizes the stress on the protected transceiver. The SOT-23 package allows flexibility in the design of “crowed” circuit boards.FEATURES
● 400 Watts Peak Pulse Power per (8/20μs)● Transient protection for asymmetrical data lines to IEC61000-4-2 (ESD) ±15kV (air), ±8kV (contact) IEC61000-4-4 (EFT) 40A (5/50ns) IEC61000-4-5 (Lightning) 12A (8/20μs)
● Protects two +12V to -7V lines
● Low capacitance
● Low leakage current
● Low clamping voltage
● Solid-state silicon avalanche technology
● Meets MSL 1 Requirements Schematic & Pin Configuration 3 1 2 SOT23 (Top View) Circuit Diagram I/O 1 1 I/O 2 2 12V 12V
APPLICATIONS
● Protection of RS-485 transceivers with extended● common-mode rang...