Resistors Resistors Open Air Resistor Open Air Resistor Metal Element Current Sense OAR Metal Element Current Sense Open Air Resistor OAR & OAR-TP Series Metal Element Current Sense OAR & OAR-TP Series Power ratings of 1, 3, & 5W 85C Superior surge performance Power ratings of 1, 3, & 5W 85C TCRs to 20ppm/C Hot sp ot isolated from PCB material Superior surge performance Power ratings of 1, 3, & 5W 85C Resistance wire TCR 20pp m/C Hot sp ot isolated from PCB material Resistance range from 2.5m to 100m Tolerances to 1% Resistance wire TCR 20pp m/C Open air design maximizes thermal performance Tolerances to 1% Welded copper leads minimize effects from solder wicking and provide All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2) true 1% performance AllAll Pb-Pb-frfreeee partsparts ccomplyomply withwith EUEU DirDirectivectivee 2011/65/EU2011/65/EU amended amended b yb y(EU) (EU) 2015/863 2015/863 (R (RoHS3)oHS3) Electrical Data Power Rating Part Resistance Tolerance Wire TCR Inductance 85C Number Range (m) (%) (ppm/C) (nH) (watts) 3, 5, 6, 8, 10, 12, 15, 20, 25, 30, 35, OAR-1 (TP) 1.0 40, 50, 60, 70, 80, 100 2, 2.5, 3, 4, 5, 6, 7, 10, 15, 20, 25, OAR-3 (TP) 3.0 1, 2, 5 20 <10 30, 40, 45, 50, 60, 70, 100 3, 4, 5, 6, 6.2, 10, 12, 15, OAR-5 (TP) 5.0 20, 25, 30, 40, 50 Notes: 2% tolerance available <5m Please contact factory for resistance values not listed Environmental Data Load Life (1000 hours 25C) R/R <1% Moisture (no load for 1000 hours) R/R <1% Temperature Cycling (-40C to +125C for 1000 cycles) R/R <1% Operating Temperature -40C to +125C General Note BI Technologies IRC Welwyn General Note TT Electronics reserves the right to make changes in product specification without notice or liability. IRC reserves the right to make changes in product speci cation without notice or liability. All information is subject to IRCs own data and is considered accurate at time of going to print. General Note All information is subject to TT Electronics own data and is considered accurate at time of going to print. A subsidiary of BI Technologies IRC Welwyn OAR Open Air Resistor Open Air Resistor Open Air Resistor Metal Element Current Sense Metal Element Current Sense Metal Element Current Sense OAR & OAR-TP Series OAR & OAR-TP Series OAR Open Air Resistor Physical Data Physical Data Metal Element Current Sense On lower ranges stand-off may be eliminated NOTE: B Contact factory for: 1. Variations of A dimension. Physical Data C 2. Different lead diameter. E On lower ranges stand-off may be eliminated F Test Point (Kelvin connection) A NOTE: B Contact factory for: Type A B max C E F 1. Variations of A dimension. Dimensions (Inches and (mm)) C 2. Different lead diameter. 0.45 +0.04/-0.02 IROCAR1 Type A B0.32 (8.12) C E E F (11.43 +1.02/-0.51 ) F 0.450 +0.040/-0.020 0.27 Typ 0.125 0.030 0.065 +0.010/-0.005 0.040 0.002 Test Point (Kelvin connection) 0.197 +0.04/-0.03 A OAR-1 OAR1TP 0.45 (11.4) (11.43 +1.020/-0.508) 0.32 (8.12) max (3.18 0.762) (1.65 +0.254/-0.127) (1.02 0.051) (5.0 +1.0/-0.8 ) 0.600 +0.040/-0.020 0.65 Typ 0.125 0.030 0.065 +0.010/-0.005 0.040 0.002 0.60 +0.04/-0.02 Dimensions (Inches and (mm)) OOAR-3AR3 0.92 (23.4) (15.24 +1.02/-0.51 ) (15.24 +1.020/0.508) 0.92 (23.4) max (3.18 0.762) (1.65 +0.254/-0.127) (1.02 0.051) IRC Type A B C 0.125 0.03 0.065E +0.01/-0.005 F0.04 0.002 OAR3TP 0.275 +0.04/-0.03 0.800 +0.040/-0.020 0.65 Typ 0.125 0.030 0.065 +0.010/-0.005 0.040 0.002 (3.18 0.76) (1.65 +0.25/-0.13 ) (1.02 0.05) OAR-5 <R005 0.450 +0.040/-0.020(7.0 +1.0/-0.8 ) 0.27 Typ 0.125 0.030 0.065 +0.010/-0.005 0.040 0.002 OAR-1 (20.32 +1.020/-0.508) 0.88 (22.4) max (3.18 0.762) (1.65 +0.254/-0.127) (1.02 0.051) 1.12 (28.5) (11.43 +1.020/-0.508) 0.32 (8.12) max (3.18 0.762) (1.65 +0.254/-0.127) (1.02 0.051) OAR3TP 0.197 +0.04/-0.03 R005 (5.0 +1.0/-0.8 ) 0.600 +0.040/-0.020 0.65 Typ 0.125 0.030 0.065 +0.010/-0.005 0.040 0.002 OAR-3 0.80 +0.04/-0.02 (15.24 +1.020/0.508) 0.92 (23.4) max (3.18 0.762) (1.65 +0.254/-0.127) (1.02 0.051) Thermal Image Data OAR5 0.88 (22.4) (20.32 +1.02/-0.51 ) 0.800 +0.040/-0.020 0.65 Typ 0.125 0.030 0.065 +0.010/-0.005 0.040 0.002 OAR-5 0.275 +0.04/-0.03 OAR5TP 1.14 (29) (20.32 +1.020/-0.508) 0.88 (22.4) max (3.18 0.762) (1.65 +0.254/-0.127) (1.02 0.051) (7.0 +1.0/-0.8 ) Thermal Image Data OAR-1 5 m 1 Watt OAR-3 5 m 3 Watt OAR-5 5 m 5 Watt Hot Spot: 87C Hot Spot: 160C Hot Spot: 230C Solder Joint: 45C Solder Joint: 70C Solder Joint: 96C The thermal images (not simulations) above are of the OAR 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. OAR-1 5 m 1 Watt OAR-3 5 m 3 Watt OAR-5 5 m Additionall 5 Wy, the thermal att energy is dissipated to the air instead of being conducted into the circuit board potentially causing a nearby power Hot Spot: 87C Hot Spot: 160C Hot Spot: 230C component to exceed its rating. Solder Joint: 45C Solder Joint: 70C Solder Joint: 96C The thermal images (not simulations) above are of the OAR products at their respective power rating. Notice the The standard test circuit board consists of a four layer FR4 material with 2 ounce (70m) outer layers and 1 ounce solder joint temperature is much lower than the hotspot. The unique construction of the OAR isolates the tempera- (35m) inner layers, which is typical of many industry designs. The test conditions were in ambient temperature ture of the hotspot from the circuit board material preventing damage to the circuit board. Additionally, the thermal conditions, approximately 22 C with no forced air. Contact TT electronics for more details or for other thermal image energy is dissipated to the air instead of being conducted into the circuit board potentially causing a nearby power test data for specific resistance values and power levels. component to exceed its rating. 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 OAR Series Issue June 2011 Sheet 2 of 3 The standard test circuit board consists of a four layer FR4 material with 2 ounce (70m) outer layers and 1 ounce (35m) inner layers, which is typical of many industry designs. The test conditions were in ambient temperature conditions, approximately 22 C with no forced air. Contact TT electronics for more details or for other thermal image test data for specific resistance values and power levels. Wire and Film Technologies Division 4222 South Staples Street Corpus Christi Texas 78411 USA General Note Telephone: 361 992 7900 Facsimile: 361 992 3377 Website: www.irctt.com OAR Series Issue June 2011 Sheet 2 of 3 General Note BI Technologies IRC Welwyn BI Technologies IRC Welwyn TT Electronics reserves the right to make changes in product specification without notice or liability. TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics own data and is considered accurate at time of going to print. All information is subject to TT Electronics own data and is considered accurate at time of going to print. www.ttelectronics.com/resistors