New Generation of Reflowable Thermal Protection (RTP)

According to sources, the new generation of low-resistance, high-current reflowable thermal protection (RTP) devices was recently released by the TE Circuit Protection Division. The RTP series is a more convenient, cost-effective alternative to typical thermal fuses. RTP devices help prevent thermal runaway damage caused by damage and failure of various MOSFETs, capacitors, integrated circuits, resistors, and other power components. At the same time, this RTP device is lead-free and halogen-free, RoHS compliant and supports conformal coatings.

Compared to the original RTP device variant, the new RTP200R060SA device offers a lower, 0.6 milliohm (typical) series resistance, as well as high voltage capability (32VDC) and high currents up to 200A at 16VDC. DC interrupt rating. These characteristics make it suitable for a variety of automotive applications such as HVAC, ABS, power steering systems, DC-DC converters, and PTC heaters. The device can also help protect power components in IT servers, communications power supplies, LED lighting systems, and electronic devices.

Unlike radial lead thermal fuses, which must be installed after reflow, RTP devices allow the use of standard surface mount production methods, eliminating the need for special assembly operating procedures and associated costs. The 200°C open circuit temperature of the RTP device prevents various false activation actions, especially in the automotive environment, to 175°C. There is a need for "no tripping" in temperature.

In order to enable it to be disconnected at 200°C in the field of application, the RTP device uses a one-time electronic activation program to make it thermally sensitive. Before activation, it was able to withstand three lead-free solder reflow steps (peak up to 260°C) without breaking. Activation can be implemented in the system test or the actual application site.