Bourns Miniature Thermal Cutoff Mini-Breaker Series Supports New 240 Watt USB Power Delivery Standard Limit

­Bourns, Inc., a leading manufacturer and supplier of electronic components for power, protection, and sensing solutions, today introduced its SE Series miniature Thermal Cutoff (TCO) Mini-Breaker devices that are designed to support 240 W, which meets the upper limit of the USB Power Delivery (PD) standard. The SE Series is Bourns smallest 54 V surface mount Mini-Breaker, with a footprint size of 4.7 mm x 2.8 mm and a height of only 1.23 mm.

The growth in usage of USB fast charging and higher power cables is expected to accelerate globally. Furthermore, the Common Charger Directive, which was applied in the European Union in 2024, requires mobile phones, tablets, headphones and other personal electronics to be equipped with a USB-C connector. A known downside to fast charging is that it can increase the risk of heat generation from connector ingress situations.

An effective overtemperature remedy that can be installed right on the Type-C connector, the new series is capable of virtually instantaneously detecting heat generation above preset limits and interrupts the current to directly shut off the power line. This capability also eliminates the need for additional ICs or other switches helping customers to reduce a design’s component count. The series also supports the higher levels of overtemperature protection necessary for fast charging where the various models in the SE Series feature temperature settings ranging from 72 °C to 85 °C, each with a ±5 °C tolerance range.

Bourns® SE Series Mini-Breakers are available now and are RoHS* compliant. For more detailed product information, please go here.