OAR3R100FLF TT Electronics/IRC, OAR3R100FLF Datasheet - Page 2

• Manufacturer Part Number: OAR3R100FLF
• Description: RES METAL .100 OHM 3W 1% RADIAL
• Manufacturer: TT Electronics/IRC
• Series: OARr

Specifications of OAR3R100FLF

• Resistance (ohms): 0.1
• Number Of Terminations: 2
• Package / Case: Radial
• Power (watts): 3W
• Composition: Metal Element
• Features: Current Sense, Flame Proof
• Temperature Coefficient: ±20ppm/°C
• Tolerance: ±1%
• Size / Dimension: 0.600" L x 0.065" W (15.24mm x 1.65mm)
• Height: 0.920" (23.37mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 989-1094; OAR-3-R100-F-LF

Physical Data
Thermal Image Data
The thermal images (not simulations) above are of the OARs products at their respective power rating. Notice the
solder joint temperature is much lower than the hotspot. The unique construction of the OAR isolates the tempera-
ture of the hotspot from the circuit board material preventing damage to the circuit board. Additionally, the thermal
energy is dissipated to the air instead of being conducted into the circuit board potentially causing a nearby power
component to exceed its rating.
The standard test circuit board consists of a four layer FR4 material with 2 ounce outer layers and 1 ounce inner
layers, which is typical of many industry designs. The test conditions were in ambient temperature conditions, ap-
proximately 72 °C with no forced air. Contact IRC for more details or for other thermal image test data for specifi c
resistance values and power levels.
Wire and Film Technologies Division
Telephone: [phone] • Facsimile: 361 992 3377 • Website: www.irctt.com
OAR
Open Air Resistor
Metal Element Current Sense
IRC Type
OAR-1 5 mΩ @ 1 Watt
Hot Spot:
Solder Joint: 45°C
OAR-1
OAR-3
OAR-5
(11.43 +1.020/-0.508)
(20.32 +1.020/-0.508)
(15.24 +1.020/0.508)
0.450 +0.040/-0.020
0.600 +0.040/-0.020
0.800 +0.040/-0.020
87°C
A
• 4222 South Staples Street • Corpus Christi Texas 78411 USA
0.32 (8.12) max
0.92 (23.4) max
0.88 (22.4) max
0.27 Typ
0.65 Typ
0.65 Typ
B
Dimensions (Inches and (mm))
OAR-3 5 mΩ @ 3 Watt
Hot Spot:
Solder Joint:
C
B
(3.18 ±0.762)
(3.18 ±0.762)
(3.18 ±0.762)
0.125 ±0.030
0.125 ±0.030
0.125 ±0.030
160°C
70°C
A
C
(1.65 +0.254/-0.127)
(1.65 +0.254/-0.127)
(1.65 +0.254/-0.127)
0.065 +0.010/-0.005
0.065 +0.010/-0.005
0.065 +0.010/-0.005
E
F
E
OAR-5 5 mΩ @ 5 Watt
Hot Spot:
Solder Joint:
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 Series Issue July 2010 Sheet 2 of 3
230°C
96°C
(1.02 ±0.051)
(1.02 ±0.051)
(1.02 ±0.051)
0.040 ±0.002
0.040 ±0.002
0.040 ±0.002
F