TT ELECTRONICS OAR-3 Current Sense Resistor, 0.04 Ohm, 3W, Metal Strip, Radial,

The TT ELECTRONICS OAR-3 is a through-hole, metal element current sensing resistor designed for precise measurement and power management in demanding circuits. With a low resistance value of 0.04 ohms and a robust 3-watt power rating, it is engineered to handle significant current flows while maintaining accuracy and stability.

This resistor belongs to the OAR (Open Air Resistor) series, which is characterised by its superior surge performance and a design that isolates the component's hot spot from the PCB material. This isolation enhances reliability and protects the board from thermal stress. The device offers excellent endurance, rated for 1000 hours at 25°C, and operates across a wide temperature range from -40°C to +125°C.

Key to its performance is a tight resistance tolerance of ±1% and a low temperature coefficient of resistance (TCR) of ±20ppm/°C, ensuring minimal drift across varying environmental conditions. The radial leaded, metal strip construction provides a durable and easy-to-install solution for through-hole mounting.

Ideal Applications

• Power supplies and converters
• Motor control and drive circuits
• Battery management systems (BMS)
• Overcurrent protection and sensing circuits
• Industrial automation and instrumentation
• Automotive electronics
• Energy management systems