Compact current limiter protects PLCs from damaging sensor or button inputs
The STMicroelectronics CLT03-2Q3 current limiter provides the characteristics required in industrial systems and factory automation equipment, including good noise immunity and low power dissipation.
The CLT03-2Q3 digital input current limiter from STMicroelectronics protects programmable logic controllers (PLCs) or other digital devices from the risk of damage caused by excessive current transferred from input devices such as safety buttons or sensors. It is a dual-channel current limiter supplied in a 16-lead QFN or 8-lead SOT23 package.
The CLT03-2Q3 includes a de-glitch filter to maintain high immunity to EMI, for safer and more reliable operation. The current limiter requires no external power supply, and can drive either an optocoupler or a 3.3 V LVTTL circuit.
Low power dissipation means that designers can use the CLT03-2Q3 to build compact systems comprised of densely mounted assemblies of I/O modules.Â
This current limiter enables designers to implement system designs which conform to standard industry requirements such as reverse polarity operation and over-voltage tolerance.