The RN55D1270F is a thick film, surface mount chip resistor from Vishay. It has a 7.5mm x 4.5mm footprint with a 0.5W power rating, and a resistance range of 1200 ohms. It is designed for high temperature operations up to 155°C, making it ideal for automotive, communications, industrial, and medical applications. The device is constructed using a high performance metal alloy with an flame-resistant coating to provide excellent electrical and thermal characteristics. The chip is RoHS compliant and lead-free, making it environmentally friendly. Standard tolerances are ±1%, although other tolerances may be available upon request.