PPTC protection device technology in automotive electronics

The PPTC device technology has been widely used in portable electrical appliances, mobile phones, computers and telecommunications equipment overcurrent and overheating the circuit protection design. Automotive Electronics Technology Committee launched a new standard of passive components, and to promote the application of polymer positive temperature coefficient device (PPTC) circuit protection technology in the automotive industry. New car designed mainly for electronic circuits and motor accessories such as power windows, power seats, sunroof control and telematics devices, designed to reduce costs and improve the reliability and functionality. Motor drive and control devices are subjected to some of the harsh working environment, but also requires continuous and reliable operation. Site failure can not be avoided, to select the correct circuit protection strategy will help to ensure the reliability of the product, and the manufacturer and customer maintenance costs to a minimum. Raychem Circuit Protection PolySwitch ™ polymer positive temperature coefficient (PPTC) resettable circuit protection devices, the architecture is more solid and reliable products, some common fault in the motor drive and control systems provide protection.

PolySwitch polymeric positive temperature coefficient devices supplier type lead type, shaft type, chip type, disk type and surface mount type. Polymeric positive temperature coefficient devices compact shape helps save valuable board space with resettable functionality, allows arranged at the location of the users do not have access to this layout users to easily replace traditional fuses need The location for the replacement, with the obvious difference compared. Since the polymer positive temperature coefficient device is a solid state device, it is also able to withstand mechanical shock and vibration, and can provide a reliable circuit protection for a variety of different applications.

Power Protection

The PolySwitch device has been applied to the power supply DC output of the overload and short circuit protection. Developed LVR series of PolySwitch devices can be applied in the AC main circuit power input. This product will be the AC line transformer, and other line-side device is placed in the the PolySwitch device product series within the scope of protection. These products can be careless in the neutral line is in the OFF state or the AC line voltage for 24 VAC input, it is possible to provide protection for the power supply. The LVR device is suitable for the power system, 120VAC and 240VAC voltage, maximum input current up to 400 mA. Higher current power supply system can be the PolySwitch device placement in the secondary side of the output circuit for the protection of the power failure caused by the overcurrent state.

RXE input / output interface protection

Many drives and control devices are equipped with a communications and data interface for the transfer of information between the various system components. The wiring of these interfaces are sometimes side by side with the AC or DC power cable laying. The harness may be due to normal wear and tear, accidents, install wiring error, or misuse of central distribution box, and a short circuit. If the power cable and communication cable short-circuit phenomenon, PolySwitch devices can protect any system that is connected with this short-circuit line to avoid the damage of the communication interface. In some cases, this phenomenon is likely to affect many systems. The PolySwitch device from the premises of the protection interface, you can significantly reduce downtime and repair costs of equipment common fault.

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