Datasheet

IRC Wire and Film Technologies Division

General Note

A subsidiary of

TT electronics plc

OAR Series Issue February 2007

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 printing.

Telephone: 828 264 8861 • Facsimile: 828 264 8866 • Website: www.irctt.com

• 736 Greenway Road Boone, North Carolina 28607-1860

Speciﬁcations

• Power ratings of 1, 3 & 5W @ 85°C

• Resistance range from 2.5mΩ to 100mΩ

• TCRs to ±20ppm/°C

• Open air design maximizes thermal performance

•

Welded copper leads minimize effects from solder wicking and provide true 1% performance

Environmental Performance

Part Number Power rating @85°C

(Watts)

Resistance Range (milli-ohms) Tolerance

(±%)

TCR

(±ppm/°C)

Inductance

(nH)

OAR-1 1.0 3, 5, 10, *20, *25, 50

1, 2

, 5

<10

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

Notes

±2% tolerance available; Consult factory for available tolerances at resistance values less than 5mΩ.

* Denotes resistance values that may have longer lead times than other values listed

* Please contact the factory for resistance values not listed

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

Environmental PerformanceEnvironmental PerformanceEnvironmental PerformanceEnvironmental Performance

Open Air Current Sense Resistors

OAR Series

PAGE 1
OAR Series Open Air Current Sense Resistors IRC Wire and Film Technologies Division • Power ratings of 1, 3 & 5W @ 85°C • Resistance range from 2.5mΩ to 100mΩ • TCRs to ±20ppm/°C • Open air design maximizes thermal performance • Welded copper leads minimize effects from solder wicking and provide true 1% performance Specifications Part Number Power rating @85°C (Watts) Resistance Range (milli-ohms) 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.
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OAR Series Open Air Current Sense Resistors IRC Wire and Film Technologies Division Dimensions Inches and (mm) On lower ranges stand-off may be eliminated B C E A Test Point (Kelvin connection) F Type A B2 C3 E F OAR-1 0.450 +0.040/-0.20 0.200 ±0.100 0.125 ±0.030 0.065 +0.010/-0.005 0.040 ±0.002 (11.43 +1.020/-0.508) (5.08 ±0.2.54) (3.18 ±0.762) (1.65 +0.254/-0.127) (1.02 ±0.051) 0.600 +0.040/-0.20 0.600 typical - 1.00 max. 0.125 ±0.030 0.065 +0.010/-0.005 0.040 ±0.002 (15.