PTR030V0135-BK is a 30 V DC radial leaded PolyTron PTC (Positive Temperature Coefficient) thermistor device designed for overcurrent protection in electronic circuits. This device features a holding current of 1.35 A at 23°C, a trip current of 2.70 A, and a maximum fault current rating of 40 A, with typical power dissipation of 0.8 W in the tripped state. The device exhibits low initial resistance of 0.080 O and post-trip resistance of 0.13 O, enabling fast time-to-trip response of 7.30 seconds at rated current. It is halogen-free, lead-free, and RoHS compliant, with cURus and TUV agency recognition. The PTR030V0135-BK is commonly used in medical equipment, white goods, industrial power transmission, telecommunications, computers, consumer electronics, and rechargeable battery packs where reliable overcurrent protection and fast response are essential.