General Note
IRC reserves the right to make changes in product specifi cation without notice or liability.
All information is subject to IRC’s own data and is considered accurate at time of going to print. A subsidiary of
TT electronics plc
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
• Superior surge performance
• Hot spot isolated from PCB material
• Resistance wire TCR ±20ppm/°C
• ±1% or ±5% tolerance (2% below 5mOhm)
• Lead Free RoHS compliant construction available
Electrical Data
IRC Type Power Rating
(watts)
Available Resistance
(ohms)
OAR-1TP 1W @ 85°C 0.003 ohms to 0.10 ohms
OAR-3TP 3W @ 85°C 0.0025 ohms to 0.10 ohms
OAR-5TP 5W @ 85°C 0.003 ohms to 0.050 ohms
Physical Data
Dimensions (Inches and (mm))
IRC
Type
Resistance
(Ohms) ABC E F
OAR-1TP 0.003 - 0.10 0.197 +0.040/-0.031
(5.0 +1.0/-0.8)
0.300 max
(7.8)
0.125 ±0.100
(5.08 ±2.54)
0.065 +0.010/-0.005
(1.65 +0.25/-0.13)
0.040 ±0.002
(1.02 ±0.051)
OAR-3TP
<0.005 0.275 +0.040/-0.031
(7.0 +1.0/-0.8)
1.00 max
(25.4)
0.125 ±0.100
(5.08 ±2.54)
0.065 +0.010/-0.005
(1.65 +0.25/-0.13)
0.040 ±0.002
(1.02 ±0.051)
0.005 - 0.10 0.197 +0.040/-0.031
(5.0 +1.0/-0.8)
1.00 max
(25.4)
0.125 ±0.100
(5.08 ±2.54)
0.065 +0.010/-0.005
(1.65 +0.25/-0.13)
0.040 ±0.002
(1.02 ±0.051)
OAR-5TP 0.003 - 0.050 0.275 +0.040/-0.031
(7.0 +1.0/-0.8)
1.10 max
(27.9)
0.125 ±0.100
(5.08 ±2.54)
0.065 +0.010/-0.005
(1.65 +0.25/-0.13)
0.040 ±0.002
(1.02 ±0.051)
C
A
E
B
D
0.093 REF
A .050 On lower ranges stand-off may be
eliminated.
NOTE:
Contact factory for:
1. Variations of “A” dimension.
2. Different lead diameter.
Test Point (Kelvin connection)
OAR TP
Open Air Sense Resistors
Metal Alloy Strip
Weld
Node
Copper
Leads
Resistive
Element
Stand-Off
OAR-TP Series Issue October 2010 Sheet 1 of 2
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
Wire and Film Technologies Division
Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com
Sample Part No.
IRC Style
Power Rating in Watts
Resistance Range
Tolerance
RoHS Indicator
Ordering Data
OAR-TP 1 R100 J LF
Features:
• Welded construction
• Flameproof
• Inductance less than 10 nanohenries
Applications:
• Current sensing
• Feedback
• Low inductance
• Surge and pulse
Operating Characteristics:
• Load life @ 25°C (1000 hrs): 1% max.
• Moisture no load (1000 hrs): 1% max.
• Temperature cycle @ -40°C & +125°C (1000 cyc): 1% max.
OAR TP
Open Air Sense Resistors
Metal Alloy Strip
OAR-TP Series Issue October 2010 Sheet 2 of 2
