Resistors Low Resistance Metal Alloy Resistor LRMA LowSeries Resistance Metal Alloy Resistor Resistance range 0.5m to 300m LRMA Series operation to 170C High temperature * * * * * * Low thermal EMF version Resistance range 1 to 100m High power version operation to 170C High temperature Low thermal version Current sensing EMF for power electronics High power version RoHS compliant & halogen free Current sensing for power electronics AEC-Q200 qualified & halogen free RoHS compliant All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) Electrical Data LRMA Version Size Power rating @70C Overload rating (5s) Resistance range W W m Standard values m 1 Resistance tolerance1 TCR (25 to 125C) Ambient temperature Insulation resistance Element alloy % ppm/C C M 2010 1.5 7.5 5 to 100 Standard values (25 to 125C) ppm/C Ambient temperature Insulation resistance Element alloy R10: 3, >R10: 2 R10: 15, >R10: 10 0.5 to 300 0.5, 0.75, 1, 1.1, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 18, 20, R01: 75 >R001 & <R01: 100, Cu-Ni 1, 5 R001: 275 -55 to 170 >100 M (Low thermal EMF) 1206 2512 0805 0.5 1 5 2.5 5 to 25 1 to 50 5, 6, 8,9, 1, 1.2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, m 10, 20, 25 15, 18, 20, 22, 25, 30, 39, 40, 50 % Resistance tolerance1 TCR R01: 2, >R01: 1 R01: 10, >R01: 5 1 to 100 1, 1.5, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 11, 12, 22,25, 27, 30, 33, 39, 40, 45, 47, 50, 57, 60, 68, 70, 75, 80, 85, 90, 15, 18, 20, 25, 30, 33, 35, 40, 50, 100 100, 120, 130, 140, 150, 180, 200, 220, 240, 250, 270, 280, 300 W W m 1 P (Power) 2512 5, 6, 10, 15, 20, 50, 100 LRMA Version Size Power rating @70C Overload rating (5s) Resistance range T (Standard) 2512 50 100 M Mn-Cu R01: 2, >R01: 1 R01: 10, >R01: 5 0.5 to 60 0.5, 0.75, 1, 1.5, 2, 3.5, 5, 10, 20, 25, 30, 40, 50, 60 1, 5 R01: 75, >R001 & <R01: 100 R001: 275 -55 to 170C >100 50 Cu-Ni / Mn-Cu 0612 1 to 3 1, 3 N (Inverse) 0815 12 5 3 to 30 3, 4, 5, 10, 15, 20, 25, 30 1225 3 15 2 to 40 2,3,4,5,10,15, 20,25,30,40 100 Mn-Cu / Cu-Ni 2 Notes: 1. Non-standard values and tighter tolerances may be available for high volume requirements. 2. Requires 300mm copper pad & trace area Physical Data (All dimensions in mm and nominal weight in mg) Size 0805 1206 <R002 1206 R002 0612 0815 2010 2512 <R001 2512 R001 & R0031 2512 >R0031 1225 L W 2.0 0.1 1.25 0.1 3.2 0.2 1.6 0.2 1.70.2 3.20.2 2.1 0.25 3.75 0.3 C 0.4 0.2 1.1 0.3 0.5 0.3 0.40.2 0.5 0.2 t 0.6 0.2 0.75 0.2 0.6 0.2 0.6 0.2 0.7 0.2 5.0 0.2 2.5 0.2 6.4 0.2 3.2 0.2 0.6 0.3 0.6 0.2 2.6 0.2 2.0 0.2 0.65 0.25 3.2 0.3 6.4 0.3 0.5 0.2 Wt 5.5 18.3 12.9 14.1 35.6 57 to 63 0.9 0.2 0.9 0.2 70 Note 1 - For P version this threshold is R004 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. BI Technologies IRC Welwyn www.ttelectronics.com/resistors (c) TT Electronics plc 11.18 Low Resistance Low Alloy Resistance Metal Resistor Metal Alloy Resistor LRMA Series LRMA Series Construction Coating (UL94-V0) Copper electrode with nickel then tin plating Low TCR resistance alloy plate Marking The components are marked with ohmic value, e.g. "R002" = 2m, "R010" = 10 m. Due to space restrictions, for LRMAM1206-R001, "01" = 1m is used, and for LRMAM0805, "002" = 2m, "010" = 10 m are used. Solvent Resistance The component is resistant to all normal industrial cleaning solvents suitable for printed circuits. Performance Data Load at rated power (cyclic load, 1000 hours at 70C) Short term overload (5 x rated power for 5s) Humidity (1000 hours, 85C, 85%RH) Temperature cycle (-40 to +125C, 1000 cycles, 15 minute dwell) Resistance to solder heat (260C 5C for 20s 1s) Solderability (245C 5C for 2s 0.5s) Dry heat (1000 hours at 170C) Low temperature storage (1000 hours at -55C) Substrate bending (board 1.6mm, fulcrum spacing 90mm, deflection 2mm) Insulation resistance (1 minute @ 100Vdc) R R R R R R R R Maximum (%) Typical (%) 0805: 1.5 Others 1 0.5 0805: 1 Others 0.5 0805: 1 Others 0.5 0.5 >95% coverage 0805: 1.5 Others 0.5 0.5 0805: 1 Others 0.5 >100M 0.3 0.15 0.15 0.15 0.3 0.3 0.15 0.3 Thermal Performance & Mounting Typical Temperature Rise Temperature Rise (C) Proportion of Pr Temperature Derating 100% 80% 60% 40% 20% 0% -30 20 70 120 Hot spot 100 80 60 40 Joint 20 0 0% 170 Ambient Temperature (C) Reference Pad Dimensions (mm) Size a b L 3.8 0.7 0.7 0612 1.4 1.15 1.2 0805 1.8 2.3 1.0 1206 <R002 1206 R002 1.8 1.7 1.6 7.9 1.5 0.9 0815 3.4 1.5 3.5 2010 4.0 3.1 1.3 2512 R0031 4.0 2.1 4.1 2512 >R0031 7.0 1.0 2.3 1225 120 20% L b a Current 40% 60% 80% 100% Proportion of Pr Sense The temperature rise shown is highly dependent on mounting conditions. Reference conditions assume 20 copper with thermal vias to multiple layers. The self-heating in the current tracks should be kept negligible, or allowed for by temperature derating. Note 1 - For P version this threshold is R004 Standard 4-terminal probe pitches for measuring unmounted parts are 2.8 x 1.7mm (0612), 0.4 x 1.83mm (0805), 0.4 x 2.8mm (1206), 1.2 x 4.5mm (2010), 1.5 x 5.8mm (2512), and 5.4 x 3.4mm (1225). All probe location tolerances 0.02mm. 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. BI Technologies IRC Welwyn www.ttelectronics.com/resistors (c) TT Electronics plc 11.18 Low Resistance Metal Resistor Metal Alloy Resistor Low Alloy Resistance LRMA Series LRMA Series Packaging Bottom Tape Wr C B A Tr Paper Tape Size Tape 0805 Paper A 1.6 0.15 0612, Paper 1206 2.0 0815 Emboss W 8.0 0.2 0.2 8.0 E 1.75 0.05 0.1 P1 P2 0.1 0.1 4.0 2.0 0.1 +0.1/-0 C Wr 178 2 60 1 13 1 9 1 11.4 178 2 60 1 13 1 9 1 11.5 178 2 60 1 13 1 13 1 15.4 0.15 178 2 60 1 13 1 13 1 15.4 0.15 178 2 0.84 1.75 0.1 0.1 0.05 0.1 +0.1/-0 1.5 0.84 2.6 4.5 12 5.5 1.75 4.0 2.0 4.0 1.55 1.1 5.5 1.75 4.0 1.5 0.85 5.5 1.75 1.5 0.85 5.3 12 0.2 0.05 0.05 0.2 0.2 0.05 6.9 12 0.1 +-0.1 0.2 4.0 2.0 0.1 0.05 0.1 0.1 0.05 0.05 +0.1/-0 0.1 0.1 0.05 0.05 +0.1/-0 4.0 2.0 4.0 A 0.1 3.5 0.1 4.0 t 1.5 0.05 0.2 2.0 D0 0.2 0.2 4.0 P0 4.0 0.2 0.2 3.6 F 3.5 0.15 2.8 2010 Emboss 0.2 2512 Emboss 3.6 0.2 1225 Storage B 2.4 0.1 0.1 B Tr 1 1 2 2 60 1 13 1 13 1 15.4 2 Conditions: 5C to 35C and 40% to 75%RH Shelf life: 2 years from manufacture Processing LRMA series resistors are suitable for both wave and IR reflow soldering. The recommended reflow profile for Pbfree SAC305 alloy (Sn 96.5%, Ag 3%, Cu 0.5%) soldering is as follows: Pre-heat: 60s to 120s at 150C to 180C Soldering: 20s to 40s at 230C Peak: 5s at 250C to 255C Ordering Procedure Ordering Procedure Example: LRMA low thermal EMF version in 2512 size and at 10 milliohms and 1% tolerance packed in tape. 1 Example: LRMAM2512-R01FT4 (LRMA2512, low L Rthermal M A M EMF, 2 5 1 210- milliohms R 0 1 F T 41%, Pb-free) Type Version T L R P M Size M 1 A M 2 2 N 5 1 2 -1 R 0 3 F 4 5 T 4 6 1 2 3 4 5 6 Type Version Size Value Tolerance Packing F = 1% J = 5% Tape & reel T5 0612, 0805, 1206 5000/reel T4 0815, 2010, 2512, 1225 4000/reel Value (use IEC62 code) Tolerance (use IEC62 code) LRMA T Standard 0612 3 to 6 P Power 0805 characters M Low thermal EMF 1206 R = ohms Packing N Inverse 0815 T5 0612, 0805, 1206 5000/reel 2010 Tape Standard T4 0815, 2010, 2512 4000/reel 2512 Note 1: For values which require 6 characters, e.g. R00075, the hyphen is omitted. 1225 F J 1 1% 5% Note 1: For values which require all 6 characters, e.g. R00075, the hyphen is omitted. 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. BI Technologies IRC Welwyn www.ttelectronics.com/resistors (c) TT Electronics plc 11.18