Open Air Sense Resistors

Open air sense resistors from TT Electronics/IRC provide reliable over-current protection

IRC's Open Air Sense ResistorsTT Electronics/IRC provides their OARS-XP series metal element resistors, with the ability to withstand high surge currents and extreme temperature cycling environments. The devices are specified for PWM control circuits and motor controllers as well as fault detection and power factor correction (PFC) circuits.

The OARS-XP series resistors consist of a flameproof 0.25 inch wide metal element resistance alloy welded to compliant copper terminals designed to compensate for the TCE (thermal coefficient of expansion) mismatch between the device and the PC board. Unlike other resistor technologies, such as thin film/thick film chips or foil devices, the alloy used in the open air metal element provides stable resistance values that will not experience degradation of performance at extreme temperatures (even at high temperatures). Its unique open-air design allows the heat to be dissipated into the air rather than conducted to the PC board where thermally-sensitive components are located.

  • Flameproof
  • Superior thermal expansion cycling
  • Lead flexible for thermal expansion temperatures ranging from -40°C to +125°C
  • Current sense
  • Power supplies
  • Stalled motor sensor
  • Feedback and gain control
  • Input resistor for PWM circuit

Open Air Sense Resistors

ImageManufacturer Part NumberDescriptionAvailable Quantity
OARSXPR020FLF datasheet linkRES SMD 0.02 OHM 1% 5W STRIPOARSXPR020FLFRES SMD 0.02 OHM 1% 5W STRIP825 - Immediate
OARSXPR020FLF product page link
OARSXPR025FLF datasheet linkRES SMD 0.025 OHM 1% 5W STRIPOARSXPR025FLFRES SMD 0.025 OHM 1% 5W STRIP116 - Immediate
OARSXPR025FLF product page link
OARSXPR001FLF datasheet linkRES SMD 0.001 OHM 1% 5W STRIPOARSXPR001FLFRES SMD 0.001 OHM 1% 5W STRIP347 - Immediate
OARSXPR001FLF product page link
OARSXPR002FLF datasheet linkRES SMD 0.002 OHM 1% 5W STRIPOARSXPR002FLFRES SMD 0.002 OHM 1% 5W STRIP0OARSXPR002FLF product page link
OARSXPR005FLF datasheet linkRES SMD 0.005 OHM 1% 5W STRIPOARSXPR005FLFRES SMD 0.005 OHM 1% 5W STRIP0OARSXPR005FLF product page link
Published: 2011-02-28