Resistors Low Resistance Metal Alloy Resistor Low Resistance Metal Alloy Resistor LRMA Series Resistance range 0.5mΩ to 300mΩ LRMA Series operation to 170°C High temperature • • • • • • Low thermal EMF version Resistance range 1 to 100mΩ High power version operation to 170°C High temperature Low thermal EMF version Current sensing for power electronics High power version RoHS compliant & halogen free Current sensing for power electronics AEC-Q200 qualified RoHS compliant & halogen free Electrical Data LRMA Version Size Power rating @70°C Overload rating (5s) Resistance range W W mΩ Standard values mΩ 1 Resistance tolerance TCR (25 to 125°C) Ambient temperature Insulation resistance Element alloy Coating % ppm/°C °C MΩ 2010 1.5 7.5 5 to 100 5, 6, 10, 15, 20, 50, 100 ≥R01: ±75 Standard values 1 Resistance tolerance TCR (25 to 125°C) Ambient temperature Insulation resistance Element alloy Coating T (Standard) 2512 0.5, 0.75, 1, 1.1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 15, 18, 20, 22, 1, 1.5, 2, 3, 3.5, 4, 5, 6, 7, 8, 10, 11, 12, 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 1, 5 ≤ R001: ±275 -55 to 170 >100 >R001 & <R01: ±100, ±50 ±100 MΩ Black ±50 Cu-Ni / Mn-Cu Black 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, mΩ 10, 20, 25 15, 18, 20, 22, 25, 30, 39, 40, 50 % ppm/°C ≤R10: 3, >R10: 2 ≤R10: 15, >R10: 10 0.5 to 300 M (Low thermal EMF) 1206 2512 0805 W W mΩ P (Power) 2512 ≤R01: 2, >R01: 1 ≤R01: 10, >R01: 5 1 to 100 Cu-Ni LRMA Version Size Power rating @70°C Overload rating (5s) Resistance range All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) 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 170°C >100 Green N (Inverse) 0612 0815 1 to 3 1, 3 12 5 3 to 30 3, 4, 5, 10, 15, 20, 25, 30 ±100 Mn-Cu / Cu-Ni Black 2 Notes: 1. Non-standard values may be available for high volume requirements. 2. Requires 300mm copper pad & trace area Physical Data Size 0805 1206 <R002 1206 ≥R002 0612 0815 2010 2512 <R001 2512 ≥R001 & ≤R003 2512 >R003 (All dimensions in mm and nominal weight in mg) L W 2.0 ±0.1 1.25 ±0.1 3.2 ±0.2 1.6 ±0.2 1.7±0.2 3.2±0.2 2.1 ±0.25 3.75 ±0.3 5.0 ±0.2 2.5 ±0.2 6.4 ±0.2 3.2 ±0.2 C 0.4 ±0.2 1.1 ±0.3 0.5 ±0.3 0.4±0.2 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 0.6 ±0.3 0.6 ±0.2 2.6 ±0.2 2.0 ±0.2 0.65 ±0.25 Wt 5.5 18.3 12.9 14.1 35.6 57 to 63 0.9 ±0.2 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.ttelectronicsresistors.com © TT Electronics plc 07.16 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” = 2mΩ, “R010” = 10 mΩ. Due to space restrictions, for LRMAM1206-R001, "01" = 1mΩ is used, and for LRMAM0805, “002” = 2mΩ, “010” = 10 mΩ 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 70°C) Short term overload (5 x rated power for 5s) Humidity (1000 hours, 85°C, 85%RH) Temperature cycle (-40 to +125°C, 1000 cycles, 15 minute dwell) Resistance to solder heat (260°C ±5°C for 20s ±1s) Solderability (245°C ±5°C for 2s ±0.5s) Dry heat (1000 hours at 170°C) Low temperature storage (1000 hours at -55°C) 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 ≤R003 4.0 2.1 4.1 2512 >R003 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. 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) and 1.5 x 5.8mm (2512). 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.ttelectronicsresistors.com © TT Electronics plc 07.16 Low Resistance Metal Resistor Metal Alloy Resistor Low Alloy Resistance LRMA Series LRMA Series Packaging Bottom Tape Wr ΦC Tr Paper Tape Size 0805 ΦB ΦA Tape Paper 0612, Paper 1206 A 1.6 B 2.4 W 8.0 F ±0.1 ±0.1 4.0 2.0 ±0.2 ±0.2 ±0.05 2.0 3.6 8.0 3.5 1.75 5.5 1.75 5.5 1.75 5.5 1.75 ±0.2 2.6 0815 Emboss ±0.2 2.8 2010 Emboss ±0.2 ±0.2 ±0.2 ±0.1 ±0.2 ±0.05 ±0.05 2512 Emboss ±0.2 ±0.2 ±0.05 3.6 ±0.2 4.5 5.3 6.9 12 12 12 P2 4.0 ±0.15 ±0.2 P1 1.75 ±0.15 Storage E 3.5 ±0.05 ±0.1 ±0.1 ±0.1 4.0 2.0 ±0.05 2.0 P0 ΦD0 11.4 Tr 9 ±1 11.5 4.0 1.5 0.84 178 ± 2 60 ±1 13 ±1 1.1 178 ± 2 60 ±1 13 ±1 13 ±1 15.4 ±2 60 ±1 13 ±1 13 ±1 15.4 ±0.1 +0.1/-0 4.0 1.55 ±0.1 ±0.1 ±0.05 ±0.05 +0.1/-0 ±0.1 ±0.1 ±0.05 ±0.05 +0.1/-0 2.0 Wr 9 ±1 ΦB +0.1/-0 ±0.2 4.0 ΦC 60 ±1 13 ±1 ±0.1 +-0.1 2.0 ΦA 0.84 ±0.1 4.0 t 1.5 4.0 ±0.1 4.0 4.0 ±0.05 178 ± 2 ±0.1 ±0.1 ±0.1 1.5 0.85 1.5 0.85 ±0.15 178 ± 2 ±0.15 178 ± 2 ±1 ±1 ±2 60 ±1 13 ±1 13 ±1 15.4 ±2 Conditions: 5°C to 35°C 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 150°C to 180°C Soldering: 20s to 40s at ≥230°C Peak: 5s at 250°C to 255°C Ordering Procedure Example: LRMA low thermal EMF version in 2512 size and at 10 milliohms and 1% tolerance packed in tape. 1 LRMAM2512–R01FT4 Type Version T P M N Size Value (use IEC62 code) Tolerance (use IEC62 code) F J 1% 5% Packing T5 T4 Tape 0612, 0805, 1206 0815, 2010, 2512 5000/reel 4000/reel Standard Note 1: For values which require 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.ttelectronicsresistors.com © TT Electronics plc 07.16