Resistors Resistors UL Recognised UL Recognised Wirewound Resistors Wirewound Resistors ULW Series ULW Series UL1412 recognised fusible resistor * UL1412 recognised fusible resistor * Failsafe mains fusing at 120 / 240Vrms Failsafe mains fusing at 120 / 240Vrms Inrush and surge withstanding Inrush and surge withstanding UL94-V0 flameproof coating Surface mount ZI-form option * UL file number E234469. All All Pb-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) Electrical Data ULW2 / ULWP2R ULW3 ULW4 ULW5 2 3 4 5 10 15 20 25 Inrush / surge performance See Pulse Performance graphs Resistance range ohms 1R0 to 100R TCR ppm/C 200 250 350 500 Resistance tolerance % 5 UL recognised standard values ohms Any value in the range 1R0 to 100R is recognised. E24 preferred Thermal impedance 110 82 62 54 Ambient temperature range C -55 to +200 Physical Data Dimensions (mm) and weight (g) PCB Min Wt. Type L Max D Max f min d nom mount bend Nom centres radius ULW2 9.0 3.8 19.8 12.5 0.5 d ULW3 14.5 5.8 24.6 20 1.1 D 1.2 0.8 L f ULW4 13 5.6 22.8 19 1.0 ULW5 16.5 7.2 23.6 22 1.8 leadformed if required and packed. Marking General Note 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. 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 www.ttelectronics.com/resistors TT Electronics plc TT Electronics plc 11.20 09.17UL Recognised Resistors Wirewound Resistors UL Recognised Wirewound Resistors ULW Series ULW Series Terminations Material: Hot tin dipped copper wire Strength: The terminations meet the requirements of IEC 68.2.21 Solderability: The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Flammability The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. Performance Data Maximum* Typical Load at rated power (1000 hours 25C) R% 5 3 Short term overload (5 x Pr for 5 seconds) R% 5 1 Pulse (see Pulse Performance graphs) R% 5 2 Climatic R% 5 2 Long term damp heat (56 days) R% 5 1 Climatic category 55/200/56 Temperature rapid change R% 5 1 Dry heat (1000 hours 200C) R% 5 3 Vibration R% 5 1 Robustness & solder heat R% 5 1 * Addition of 0.01 applies Thermal Performance Derating Curve Body Temperature Rise 300 100 ULW3 ULW4 250 ULW2 / ULWP2R 80 200 60 ULW5 150 40 100 20 50 0 0 0 50 100 150 200 250 300 0 1 2 3 4 5 Ambient Temperature (C) Power (W) General Note BI Technologies IRC Welwyn General Note 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 www.ttelectronics.com/resistors TT Electronics plc TT Electronics plc 09.17 11.20 Proportion of Rated Power (%) Temperature Rise (C)