TT Electronics OARS Current Sense Resistors are designed with flexible leads to accommodate thermal expansion and feature an open-air design that minimizes PCB heating. The OARS current sense resistors include a zero-ohm 65A jumper version and are AEC-Q200 qualified, ensuring high reliability. The OARS resistors support a resistance range from 2mΩ to 0.05Ω and with a tolerance of 1%. Typical applications include AC, current sensing, industrial equipment, and power management.
TT Electronics OARS Current Sense Resistors
Features
- AEC-Q200 qualified for reliability
- Includes a zero-ohm 65A jumper version
- Leads designed for thermal expansion flexibility
- Open air design to minimize PCB heating
- Power rating: 2W
- Temperature coefficient of resistance (TCR): ±40ppm/°C
Applications
- AC applications
- Current sensing
- Industrial equipment
- Power management
Video
This TTI Tech Specs video for TT Electronics OARS Current Sense Resistors explains that the OARS series features a unique design that keeps the resistor’s hot spot safely off the board and allows air to circulate around it to keep it cooler.
See Video Transcript Below
Video Transcript
I had a current sense resistor in my last design that was getting particularly hot. Great for making breakfast in the lab, but not great for reliability, so we switched it out for an OARS Current Sense Resistor from TT Electronics. The OARS series features a unique design that keeps the resistor’s hot spot safely off the board and allows air to circulate around it to keep it cooler. The resistors have low resistance copper terminals and a unique flexible lead design that tolerates the high thermal cycle counts required in automotive applications.
The OARS series is available with 2-, 3-, and 5-Watt ratings, with resistance values from 1 to 50 milliohms with less than 10 nanohenries of inductance. A 65 amp zero-ohm jumper is also available. TT Electronics OARS series current sense resistors are flameproof and can be used in ambient temperatures from negative 55 degrees Celsius up to positive 160 degrees.