CRT0603-BY-1001ELF is a thin-film precision chip resistor from Bourns' CRT Series, designed for high-accuracy current sensing and precision circuit applications. The device features ultra-tight tolerance of ±0.25% with a temperature coefficient of resistance (TCR) of ±25 PPM/°C, operating over a wide temperature range of -55°C to +155°C. It has a power rating of 1/10 watt at 70°C, maximum working voltage of 75 V, and maximum overload voltage of 150 V, with resistance values available from 49.9 O to 511 kO depending on tolerance grade. The resistor is RoHS compliant with tin-plated termination and is supplied on paper tape in 5K piece quantities on 7-inch plastic reels. Common applications include precision measurement circuits, medical equipment, printers, automation systems, and navigation equipment where high accuracy and stability are essential.