Resistance Low Resistance al Element Resistor Metal Element Resistor Low Resistance *Metal Low TCR Element Resistor * High stability over life LOB Series es bility over life * Tolerances from 1% to 5% es from 1% to 5% *LOB Ultra low resistance values (0.005 to 0.1 ) Series resistance values (0.005 : to 0.1 :) ** Low TCR Inherently non-inductive (.02 h @ 0.5 MHz) y non-inductive (d.02 h life @ 0.5 MHz) * High stability over * Available in 1W, 3W, and 5W rated packages * Tolerances 1% packages to 5% in 1W, 3W, and 5Wfrom rated ** Ultra Lead RoHSvalues compliant available lowfree resistance (0.005 : construction to 0.1 :) e RoHS compliant available * Inherently construction non-inductive (d.02 h @ 0.5 MHz) * Available in 1W, 3W, and 5W rated packages * Lead free RoHS compliant construction available ION: DESCRIPTION: eries power precision metal element resistors feature resistance values down to 0.005 with virtually no inductanc The LOBSeries precision metal element resistors feature resistance values down to 0.005 withautomatic virtually no inductance. 1, 3, and 5 watt ratedpower axial leaded packages, these resistors are compatible with insertion equipment Available in 1, 3, and 5 watt rated axial leaded packages, these resistors are compatible with automatic insertion equipment. IONS: APPLICATIONS: * Switchmode and linear power supplies ode and linear power supplies * Automotive current-sensing circuits ve current-sensing circuits * Instrumentation ntation * Regulators rs CONSTRUCTION: The LOB:Series resistors feature tinned copper leads welded directly to a low-temperature coefficient resistance element in a highly automated proprietary process. The leaded resistor elements are then encapsulated in a molding compound. CTION: Series resistors feature tinned copper leads welded directly to a low-temperature coefficient resistance element Specifiprocess. cationsThe leaded resistor elements are then encapsulated in a molding compound. mated proprietary Style Continuous Power Dissipation @ 25C in free air (watts) Overload Power for 5 seconds (watts) LOB-1 1 5 LOB-3 3 fications Maximum Working Voltage (volts) 15 Continuous Power Dissipation LOB-5 5 @ 25C in free air (watts) Overload Power 25 (watts) for 5 seconds Maximum Storage Temperature (C) 1 x R 175 3xR 175 Maximum Working 5xR Voltage (volts) 175 Maximum Storag Temperature (C *Power Dissipation - The maximum wattage rating depends upon the amount of heat which can be transferred to the surroundings while not exceeding the maximum element temperature. Ambient air temperature, velocity of cooling air, thermal resistance of heat, and the temperature of surrounding objects will affect this transfer, and must be taken into account when selecting a resistor. 1 Environmental Testing 3 Test Parameters MIL-STD 202 5 Load Life (2,000 hours) Method 108 5 1 x R 175 15 3xR 175 MAX %'R * 25 1% 5xR Unit 175 %'R on - The maximum wattage rating depends upon the amount of heat which can be transferred to the surroundings while not exceeding the maximum element temperature. velocity of cooling air, thermal resistance of heat, and the temperature of surrounding objects will affect into account when selecting a res Thermal Shock Method 107 1%this transfer, and must be taken %'R onmental Testing Vibration Method 204 0.5% %'R Mechanical Shock Method 213 0.5% %'R t Parameters Dielectric Strength MIL-STD Method 202 301 0.5% @1000 VAC %'R Method 302 Method 108 >1010@ 100 VDC 1% Ohms Insulation Resistance (2,000 hours) Shock MAX %'R * Unit %'R *0.0005 ohm allowance for test/contact error. General Note General Note Method 107 IRC reserves the right to make changes in product specification without notice or liability. TT electronics reserves theown right make changes in product All information is subject to IRC's datato and is considered accurate at time ofspecification going to print. without notice or liability. Method 204 All information is subject to TT electronics' 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 1% www.bitechnologies.com 0.5% Method 213 A subsidiary of %'R TT electronics plc www.irctt.com www.welwyn-tt.com LOB Series Issue December 2009 Sheet 1 of 3 Telephone: 361 992 7900 * Facsimile: 361 992 3377 * Website: www.irctt.com (c) TT electronics plc al Shock %'R 0.5% 08.12 %'R Low Resistance Metal Element Resistor Low Resistance Metal Element Resistor LOB Series Physical Data connect point connect point C d D l L Dimensions (Inches (mm)) Style LOB-1 LOB-3 LOB-5 L D C l 0.390 0.010 (9.9 0.3) 0.140 0.008 1.31 1.50 0.125 0.0305 0.002 (3.6 0.2) (33.274) (38.1 3.2) (0.813 0.051) 0.560 0.010 0.2100 0.010 1.31 1.375 0.125 0.0305 0.002 (14.224 0.254) (5.334 0.254) (33.274) (34.925 3.175) (0.813 0.051) 0.920 0.010 0.330 0.010 1.670 1.250 0.125 0.040 0.002 (23.368 0.254) (8.382 0.254) (42.418) (31.750 3.175) (1.016 0.051) TCR (ppm/C) Temperature Coefficient of Resistance vs. Resistance Value Power Derating Percentage vs. Free Air Ambient Temperature: 400 100 300 75 200 50 100 0 LOB-1 LOB-3 LOB-5 0 d 25 50 75 100 25 0 0 -3 Resistance (ohms x 10 ) 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 25 50 75 100 125 150 175 Ambient Temperature (C) LOB Series Issue December 2009 Sheet 2 of 3 General Note 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. www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) TT electronics plc 08.12 Low Resistance Metal Element Resistor Low Resistance Metal Element Resistor LOB Series Ordering Data To order, specify style, resistance value, tolerance, and package type as in the following example: Sample Part No. LOB-3 R010 F LF LT IRC Type LOB-1 (1 watt) LOB-3 (3 watt) LOB-5 (5 watt) Resistance Value 0.005 0.02 0.01 0.025 0.015 0.03 0.04 0.05 0.07 0.08 0.1 Tolerance J = 5%, H = 3%, F = 1% Lead-Free RoHS Compliant Packaging LT = Lead Tape (preferred) LOB-1 = 3,500 pcs. LOB-3 = 1,250 pcs. LOB-5 = 800 pcs. BLK = Bulk Pack, 500/box (non-preferred option) Wire and Film Technologies Division s 3OUTH 3TAPLES 3TREET s #ORPUS #HRISTI TEXAS 53! TELEPHONE: s FACSIMILE: s WEBSITE: WWWIRCTTCOM ,/" 3ERIES )SSUE $ECEMBER 3HEET OF General Note 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. www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) TT electronics plc 08.12