P-TCO-N400/12-2 is a polymeric thermal cutoff device designed to provide thermal protection for USB-C 2.0, 3.0, and 3.1 cables and ports in mobile device fast charging applications. The device features a compact 1206 surface-mount footprint with ultra-low resistance and a symmetrical design that promotes fast response to thermal runaway events. It operates at a maximum voltage of 12 V with a maximum current rating of 50 A, a hold current of 4.0 A at 23°C, and a thermal cutoff temperature of 80°C ±15°C. The device exhibits a resistance of 0.002 O minimum to 0.018 O maximum at 23°C and trips within 10 seconds at 2 A. With an operating temperature range of -40°C to +85°C, RoHS compliance, and halogen-free construction, this device is ideal for protecting high-speed charging ports and cables from overcurrent and thermal faults while maintaining signal integrity.