Current Sensing Resistors

  • Open Air Metal Alloy Current Sense Resistors(OAR)
  • Open Air Metal Alloy Current Sense Resistors(OAR)
  • Open Air Metal Alloy Current Sense Resistors(OAR)
  • Open Air Metal Alloy Current Sense Resistors(OAR)
Open Air Metal Alloy Current Sense Resistors(OAR)Open Air Metal Alloy Current Sense Resistors(OAR)Open Air Metal Alloy Current Sense Resistors(OAR)Open Air Metal Alloy Current Sense Resistors(OAR)

Open Air Metal Alloy Current Sense Resistors(OAR)

  • 1. Open Air Metal Alloy Current Sense Resistors with Low Resistance 0.002R to 0.1R
  • 2. Current Sense Resistors terminations
  • 3. Standard tolerance ±1%, ±2%, ±5%.
  • 4. Element: nickel-chrome or copper-nickel alloy depending
  • Product description: Current Sensing Resistors with open air design, all welded construction and low electrical inductance.
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Open Air Metal Alloy Current Sense Resistors are designed for sampling current with a very low resistance value from 0.005Ω to 0.1Ω and a very low inductive, offer a high current, flameproof alternative to conventional axial devices and flat chips for current-sense circuits where PC board space is at a premium. The open air resistor's footprint is reduced by extending the height of the device above the board, thus keeping the resistor element's "hot spot" safely off the PC board and providing for increased air circulation under it, which in turn provides increased heat dissipation and cooler operation.


Features

  1. Low inductance.
  2. Radial leads, low resistance value 0.005Ω ~ 0.1Ω.
  3. High stability open-air style. Precision alloys resistive element.
  4. Pb-free and RoHS compliant.
  5. Standard tolerance ±1%, ±2%, ±5%
  6. Open air design and all welded construction


Applications

  1. Inverter and Switching Power Supplies.
  2. CPU Drive Control, Power Tool Motor controls.
  3. Residual Battery Power Detection, Current Sensing.
  4. Automotive, Feedback System, Power Supply Shunt, Current Detective.

Dimensions:

Type Rated Power Resistance Range A(±1.0) B(Max) C(±0.8) E(±0.2)
OAR1 1W R005-R05 11.4 8.3 3.2 1.65
OAR3 3W R005-R05 15.2 25.4
OAR5 5W R005-R01 20.3 25.4

Electrical Performance:

Items Performance Requirements Methods
Weldability 95% 265±5, 10 Seconds
Short Time Overload ±(1%+0.05Ω) 10PR, 5 Seconds
Constant Damp-heat ±(2%+0.05Ω) 40±2, RH93±3, 96Hours
Shock ±(1%+0.05Ω) 1000m/S², 6m Second
Vibration ±(1%+0.05Ω) 10-1000Hz, 0.75mm, 98m/S²
TCR ±30×10^(-6)/ -55/20, 20/125
Durability at 70 ±(2%+0.05Ω) 70, PR, 1000 Hours

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