Latest ceramic PTC technology optimises protection for LED illuminations and leading-edge device designs

Two new ultra-compact over-current protection devices using ceramic PTC technology, unique to Murata, enable reliable performance, resettable operation, smaller dimensions and simpler circuit design compared to alternatives.

Two families of devices are available including the PTGL series, which combines LED overcurrent and overheating protection capabilities in a single device, and the PRG series for general power- or signal-line protection duties in a wide range of applications.

The PTGL series performs the duties of a current-limiting resistor for LED-control circuits, and also provides the opportunity to implement over-temperature protection by virtue of its positive temperature coefficient.

PRG-series devices are delivered in industry-standard 0603 or 0805 surface-mount packages, and are typically used to provide protection against misconnection of power or signal lines.

Unlike alternative protection technologies such as fuseresistors, active current-control circuitry and chip resistors, these devices combine the advantages of resettable operation, a reducedcost solution, and effective overcurrent protection.

 

FEATURES Low resistance High power ratings Trip-current range: 21mA to 2.9A Nominal resistance range: 0.15Ω to 470Ω

APPLICATIONS LED-driver circuits Li-ion battery-charging control circuitry Transformer short-circuit protection Telephone-system data-line protection DC-motor locking protection Inrush-current protection circuits

 

The PRG series can be inserted in power or signal lines with minimal PCB overhead.

 

	Murata / PTGL series
	Murata / PRG series