Current Sensing Resistors

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.
INQUIRY

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

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

Applications

Inverter and Switching Power Supplies.
CPU Drive Control, Power Tool Motor controls.
Residual Battery Power Detection, Current Sensing.
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