Resistors Low Cost Semi-Precision Power Wirewound Resistor Low Cost Semi-Precision LAS Series Power Wirewound Resistor 1 and 3 watts llo resistance wirewound 0.1 ohm to 18K ohms to speciic parameters includin LAS Series TCRs rom 20 to 5500 ppm/C 1 and 3 wColor band idenatts tification 0.1 ohm to 18K ohms 5%, 3%, 1%, .5% tolerance Colorband ll welded Color band identication ar in cap and lead Resistance wire TCR 20 ppm/C 5%, 3%, 1%, .5% tolerance RoHS-compliant version available Silicone Resistance wire TCR 20 ppm/C conormal coatin RoHS-compliant version available All Pb-All Pb-frfreeee parts c parts comply omply with EU Dirwith EU Directivective e 2011/65/EU amended b2011/65/EU amended by y (EU) 2015/863 (R(EU) 2015/863 (RoHS3)oHS3) Heat conductin ceramic substrate Electrical Data Power Rating 275C Commercial Range Non-Inductive Range Available Resistance IRC Max. Hot Spot (ohms) (ohms) (ohms) Type 125C 25C Min. Max. Min. Max. 0.5%, 1% 3%, 5% LAS-1 1 2 0.1 7.5K 0.1 3.8K 1 - 7.5K 0.1 - 7.5K LAS-3 2 3 0.1 18K 0.2 7.5K 1 - 18K 0.1 - 18K Environmental Data Test Condition ( 25C) Max R Load Life 1000 hours 1.0% Moisture Resistance 1.0% Temperature Cycle 0.5% Short Time Overload 0.5% Low Temperature Operation 0.5% Solder Heat 0.25% Shock 0.5% Vibration 0.5% LAS-3 Carbon Comp Replacement (contact factory) The LS-3 is a three watt conormal coated precision wirewound resistor. The resistance wire is welded to the end caps and wound on alumina rod or ood thermal conductivit. In circuit applications that utilize two watt carbon comp resistors the LS-3 is an idead eective replacement. The LS-3 5.6 ohm can be specicall desined to withstand 22 jooules o ener delivered b a 1000 volt 10 x 1000 usec wave shape pulse. LIGHTNING SURGE Special LS-3 5.6 ohm to 100 ohm will meet Telecom GR-1089 lihtnin requirements. V V = 1000 volts T1 = 10 usec rise T2 = 1000 usec to V2 V2 10 ohm output impedance 0 T1 T2 MICROSECONDS General Note IRC reserves the right to make changes in product specication without notice or liability. General Note BI Technologies IRC Welwyn All information is subject to IRCs own data and is considered accurate at time of going to print. TT Electronics reserves the right to make changes in product specification without notice or liability. A subsidiary of TT electronics plc Wire and Film All information is subTecject to TT Electronics own dathnologies Division 4222 South Staples Street Cora and is considered accurpus Chrate at time of going to print.isti Texas 78411 USA www.ttelectronics.com/resistors Telephone: 361 992 7900 Facsimile: 361 992 3377 Website: www.irctt.com LAS Series Issue October 2008 Sheet 1 of 3 TT Electronics plc 06.18Low Cost Semi-Precision Low Cost Semi-Precision Power Wirewound Resistor Power Wirewound Resistor LAS Series Physical Data B E A D C Dimensions (Inches (mm)) IRC A 0.032 B (max) C (max) D (Lead Diameter) E (Lead length Min) Type LAS-1 0.348 (8.84) 0.110 (2.80) 0.407 (10.34) 0.020 (0.53) 1.475 (37.5) LAS-3 0.491 (12.47) 0.149 (3.80) 0.550 (13.99) 0.032 (0.81) 1.35 (34.3) Hot Spot Temperature 25C Hot Spot Temperature 125C 275 275 250 250 LAS3 200 LAS3 LAS1 225 LAS1 150 200 100 175 50 150 25 125 0 20 40 60 80 100 0 40 80 120 160 200 Percent of 125C Power Rating Percent of 25C Power 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 LAS Series Issue October 2008 Sheet 2 of 3 General Note BI Technologies IRC Welwyn 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.ttelectronics.com/resistors TT Electronics plc 06.18 Hot Spot Temperature (C) Hot Spot Temperature (C)