OAR
Open Air Resistor
Metal Element Current Sense
•
•
•
•
•
TCR’s to ±20ppm/°C
Power ratings of 1, 3, & 5W @ 85°C
Resistance range from 2.5mΩ to 100mΩ
Open air design maximizes thermal performance
Welded copper leads minimize effects from solder wicking and provide
true 1% performance
Features:
• Welded construction
• Flameproof
• Inductance less than 10 nanohenries
• Solderable copper leads (60/40) and Lead-Free
Applications:
• Current sensing
• Feedback
• Motor Controllers
• Power Supplies
Electrical Data
Part
Number
Power Rating
@ 85°C
(watts)
Resistance
Range (mΩ)
OAR-1
1.0
3, 5, 10, *20, *25, 50
OAR-3
3.0
2.5, 5, 10, 15, 20, 25, *30, 50, 100
OAR-5
5.0
3, 5, 10, *15, *20, *25, *50
Tolerance
(±%)
TCR
(±ppm/°C)
Inductance
(nH)
1, 2¹, 5
20
<10
Notes:
¹ ±2% tolerance available <5m Ω
* denotes resistance values that may have longer lead times than other values listed
* Please contact factory for resistance values not listed
Environmental Data
Load Life (1000 hours @ 25°C)
∆R/R <1%
Moisture (no load for 1000 hours)
∆R/R <1%
Temperature Cycling (-40°C to +125°C for 1000 cycles)
∆R/R <1%
Operating Temperature
-40°C to +125°C
General Note
IRC reserves the right to make changes in product specification without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print.
Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
A subsidiary of
TT electronics plc
OAR Series Issue June 2011 Sheet 1 of 3
