Resistors Make Possible Low Resistance Metal Alloy Power Resistors LRMAP3920 Resistance range 0.2mΩ to 2mΩ Excellent long-term stability Standard power rating up to 5W Thermal substrate power rating up to 10W Current sensing for power electronics AEC-Q200 qualified All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) Electrical Data LRMAP3920 Alloy type Resistance value Power rating (standard), Pr120 1 Power rating (thermal substrate), Prts70 2 Overload rating (5s) 1 Continuous pulse energy Internal thermal impedance, Rthi Resistance tolerance TCR (20 to 60°C) Thermal EMF Inductance Ambient temperature A 0.2 mΩ W W W J °C/W % ppm/°C µV/°C nH °C B 0.3 0.5 0.7 5 10 25 1 4 1 5 20 4 12 25 12 7 C 1.5 4.5 2 4 23 9 11 20 6 14 7 11 2.5 13 4 8 6 6 9 ±200 ±150 ±70 ±60 1 ±50 <2 <3 -55 to 170 Note 1: Mounted on FR4 board. See Thermal Data and Mounting section for details. Note 2: Mounted on thermal substrate. See Thermal Data and Mounting section for details. Physical Data Dimensions in mm and weight in mg Type LRMAP3920A-R0002 LRMAP3920B-R0003 LRMAP3920B-R0005 LRMAP3920B-R0007 LRMAP3920B-R001 LRMAP3920C-R001 LRMAP3920C-R0015 LRMAP3920C-R002 L ±0.3 L1 +0.2 -0.3 H +0.3 -0.2 A max D ±0.5 ±0.1 B nom T Wt. 0.5 1.50 1.43 0.85 0.62 0.43 1.36 0.90 0.67 694 608 380 271 188 542 361 277 4.0 10.0 5.0 5.2 0.6 2.0 nom Marking The component is laser marked with “3920”, alloy type, ohmic value and tolerance. Solvent Resistance The component is resistant to all normal industrial cleaning solvents suitable for printed circuits. Construction The component is formed from a continuous band of E-beam welded precision resistive strip. Various alloys are used based on the resistance value. 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.ttelectronicsresistors.com © TT Electronics plc 12.15 Low Resistance Metal Alloy Power Resistors Make Possible LRMAP3920 Performance Data Test Load Life Short Term Overload High Temperature Exposure Temperature Cycle Low Temperature Storage Biased Humidity Moisture Resistance Vibration Mechanical Shock Board Flex Terminal Strength Resistance to Solder Heat Solderability Resistance to Solvents Method 1000 hours, cyclic load at Pr120 5 seconds, 5 x Pr120 1000 hours, 170°C 1000 cycles, -55 to +125°C, 15 minute dwell 1000 hours, -55°C 1000 hours, 85°C, 85%RH MIL-STD-202 method 106 MIL-STD-202 Method 204 MIL-STD-202 Method 213 AEC Q200-005 AEC Q200-006 MIL-STD-202 Method 210 J-STD-002 MIL-STD-202 Method 215 ±ΔR% Typical Maximum 0.5 1.0 0.1 0.5 0.3 1.0 0.1 0.5 0.1 0.2 0.2 1.0 0.1 0.2 0.1 0.2 0.1 0.5 No damage No damage 0.3 0.5 95% coverage No damage Thermal Data & Mounting Nominal Reference Mounting Pad Dimensions (mm) a b L 6.2 2.7 5.6 Hotspot Range Hotspot Range Terminal Range Terminal Range FR4 board details: 102x51mm, high Tg FR4 board with 70µm (2 ounce) inner and outer Cu planes or similar substrate, such that terminal temperature is maintained at ≤120°C. Thermal substrate details: DBC or similar thermal substrate, such that terminal temperature is maintained at ≤70°C. 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.ttelectronicsresistors.com © TT Electronics plc 12.15 Low Resistance Metal Alloy Power Resistors Make Possible LRMAP3920 Measurement Resistance testing for the LRMAP3920 is performed on the underside of the copper contacts using the following method. ≥1.5mΩ: 1A <1.5mΩ: 3A Measurement current Probe spacing along component length 8.80mm Probe spacing across component width 2.44mm Probe tip diameter ≤0.5mm Processing LRMAP3920 series resistors are suitable for IR reflow soldering. The recommended reflow profile for Pb-free soldering, for example using SAC387 alloy (Sn 95.5%, Ag 3.8%, Cu 0.7%), is as follows: Pre-heat: 30s to 45s at 180°C Soldering: 20s to 40s at 250°C Peak: 260°C Packaging LRMAP3920 resistors are packed in 16mm plastic tape, 3000 pieces per reel. M N P2 P0 D0 t E B’ W F 5° A L B0 A’ P1 B D1 K0 5° SECTION B - B’ SECTION A - A’ A0 All dimensions in mm LRMAP3920 Type (B)-R001 (B)-R0007 (C)-R002 L ±1.00 N W M E +0.30/ +0.30/ ±1.00 ±0.10 -0.10 -0.05 D0 D1 F P0 +0.10/ +0.10/ +0.10 ±0.10 -0.0 -0.0 P1 ±0.10 P2 ±0.10 t A0 P0x10 B0 +0.15/ +0.15/ ±0.20 ±0.13 -0.10 -0.10 K0 ±0.10 1.25 330 21.4 2.0 16.00 1.75 7.50 1.50 1.50 All remaining values 4.00 8.00 2.00 40.00 0.30 5.55 10.47 2.20 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.ttelectronicsresistors.com © TT Electronics plc 12.15 Low Resistance Metal AlloyResistors Low Resistance Metal Alloy Power Power Resistors LRMAP3920 Series Make Possible LRMAP3920 Ordering Procedure Ordering Procedure Example: LRMAP3920C-R0015FT (1.5±1%, milliohms ±1%, Pb-free) Example: LRMAP3920C-R0015FT (1.5 milliohms Pb-free) L R M A P 3 9 2 0 C 1 - R 2 0 0 1 5 3 1 2 3 4 5 Type Alloy Value Tolerance Packing LRMAP3920 A B C 4 / 5 characters R = ohms F = ±1% T = Plastic tape 3000/reel 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. F T 4 5 www.ttelectronicsresistors.com www.ttelectronicsresistors.com © TT Electronics plc 12.15