Low Value 3W Welwyn Components Chip Resistors Low Value 3W Resistors Low Value 3W Welwyn Components Chip Resistors LRF3W Series Low Value 3W Chip Resistors Welwyn Components Chip Resistors 3 Watts 70C LRF3W Series LRF3W Series Resistance range from 0.003 to 1 LRF3W Series 3 Watts 70C 3W in 1225 package Tolerances to 1% 3 Watts 70C Resistance range from 0.003 to 1 Resistance range from 0.003 to 0.1 Resistance range from 0.003 to 1 Tolerances to 1% Tolerances to 1% AEC-Q200 Qualified AEC-Q200 Qualified AEC-Q200 QualifiedTolerances to 1% Low thermal impedance AEC-Q200 Qualified Wide terminations enhance robustness RoHS compliant and SnPb variants AllAll Pb-Pb-frfreeee partsparts ccomplyomply withwith EUEU DirDirectivectivee 2011/65/EU2011/65/EU amended amended b yb y(EU) (EU) 2015/863 2015/863 (R (RoHS3)oHS3) Electrical Data Power Derating Curve Electrical Data Power Derating Curve Characteristic Value LRF3W 100 Electrical Data Power Derating Curve Power dissipation 70C 3 Watts Power rating 70C watts 3 Characteristic Value 100 80 1 Resistance Range R003 to 1R0 Resistance range ohms R003 to R10 Power dissipation 70C 3 Watts Characteristic Value 80 60 100 Dielectric withstand 200V Resistance tolerance % <R004: 5, R004: 1, 2, 5 Resistance Range R003 to 1R0 60 40 Power dissipation 70AmbientC temp range 3 W-55atts to +150C TCDiRelectric withstand 2ppm/C00V <R004: 550, R004: 100 80 <R004 5%, 2040 DielecAmbienttric withstand temp range -55 to +150Cvolts 200 Resistance Range R003 to 1R0 Resistance tolerance R004 1, 2, 5% Ambient temperature range C -55 to +150 <R004 5%, 20 60 0 Resistance tolerance Dielectric withstand 200V 25 70 150 TCR 100ppm/C R004 1, 2, 5% 2 Values E24 preferred 0 Temperature in C Pad & trace area for maximum 2540 70 150 TCR 3 100ppm/2C Ambient temp range -55 to +150C 2 Pad / trace area 300mmmm 500 power rating* Temperature in C Pad & trace area for maximum Note 1: Contact factory for values outside this range. Note 2: M2 any values = N x R001 and N x R005 up to N=10 are also available. 300mm <R004 5%, 20 power rating* Note 3: Recommended minimum pad & adjacent trace area for each termination for rated dissipation on FR4 PCB Resistance tolerance R004 1, 2, 5% Physical Data 0 25 70 150 TCR Physical Data 100ppm/C Top Bottom Recommended Temperature in C Pad & trace area for maximum (Board Side) Solder Pad Layout 2 Bottom Recommended Solder Pad Dimensions 300mm Top Bottom Recommended Top power rating* Recommended Solder Pad Dimensions (Board Side) (Board Side) with eSolderxample K Pad Layoutelvin PCB traces 0.51 0.13mm 0.81 0.13mm with example Kelvin PCB traces 0.51 0.13mm 0.81 0.13mm 7.6 mm Physical Data 7.6mm 2.29 Plating 0.13mm wrap-around Current Track: I 7.6mm 2.29 Plating 6.5 0.38mm 0.13mm 2 mm wrap-around 2mm 6.5 0.38mm Top Bottom Recommended 1 mm Sense Tracks: V+ V- 1mm 2mm (Board Side) Solder Pad Layout 1mm 0.94 mm max Current Track: I thickness 0.94 mm max 3.25 0.25mm 0.81 0.13mm 0.51 0.13mm thickness 3.25 0.25mm Weight 0.065g typ. Weight 0.065g typ. 2.29 7.6mm Plating 0.13mm wrap-around 6.5 0.38mm 2mm 1mm General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. 0.94 mm max General Note BI Technologies IRC Welwyn AllGeneral information Note is subject to Welwyns own data and is considered accurate at time of going to print. A subsidiary of TT Electronics reserves the right to make changes in product specification without notice or liability. thickness Welwyn Components reserves the right to make changes in product specification without notice or liability. TT electronics plc All information is subject to TT Electronics own data and is considered accurate at time of going to print. All Winformationelwyn Components is subject to Welwyn Limiteds own data Bedlington, and is conside Northumberlandred accurate NE22 at time 7AA, of UKgoing to print. A subsidiary of www.ttelectronics.com/resistors 3.25 0.25mm Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com TT electronics04.10 plc Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK TT Electronics plc Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 04.10 84 06.18 Weight 0.065g typ. 84 General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyns own data and is considered accurate at time of going to print. A subsidiary of TT electronics plc Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 04.10 84 % Of Power Rating % Of Power Rating % Of Power RatingLow Value 3W Low Value 3W Chip Resistors Chip Resistors LRF3W Series Welwyn Components LRF3W Series Chips can withstand immersion in solder at 250C for Construction 90 seconds and are suitable for reflow or wave soldering Patented non-noble copper based thick film material, mounting applications. overglaze and organic protection are screen printed on a 96% alumina substrate. The components are laser trimmed to Marking achieve the required resistance tolerance. The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Terminations Chips are packed and mounted with marking side up. The wrap-around terminations have an electroplated nickel The LRF3W Chips are mounted with the actual resistor barrier and matte tin finish, this ensures excellent leach element mounted face down on its termination pads. resistance properties and solderability. Performance Data AEC-Q200 Table 7 Max. Typ. Method (add R05) ( R20) ref Test 3 High Temp. Exposure MIL-STD-202 Method 108 R% 0.5 0.2 4 Temperature Cycling JESD22 Method JA-104 R% 0.25 0.1 6 Moisture Resistance MIL-STD-202 Method 106 R% 0.5 0.2 7 Biased Humidity MIL-STD-202 Method 103 R% 0.5 0.2 8 Operational Life (Cyclic Load) MIL-STD-202 Method 108 R% 1 0.5 14 Vibration MIL-STD-202 Method 204 R% 0.5 0.05 15 Resistance to Soldering Heat MIL-STD-202 Method 210 R% 0.25 0.05 16 Thermal Shock MIL-STD-202 Method 107 R% 0.25 0.1 18 Solderability J-STD-002 >95% coverage 21 Board Flex AEC-Q200-005 R% 0.5 0.2 22 Terminal Strength AEC-Q200-006 R% 0.25 0.1 Short Term Overload 6.25 x Pr for 2s R% 0.5 Low Temperature Storage -65C for 100 hours R% 0.5 Shelf Life Test Room temp for 12 months R% 0.1 Leach Resistance Solder dip at 250C 90s minimum Notes: 1. Full AEC-Q200 qualification applies to ohmic values R02. Packaging LRF3W Resistors are supplied taped and reeled as per IEC 286-3. The standard quantity per reel is 1800 parts. T 2 P 0 D 0 P Thermal Data 2 T 33 1.0 13 0.5mm Marking Temperature Derating (Both sides) Temperature Rise 13 0.5 100 3W 100 80 2W T 1 A D 0 1 60 0.8 0.15 2.5 0.5 1W K P 0 1 40 20 Tape dimensions in mm W P1 P0 P2 D0 D1 E F A0 B0 K0 T T1 T2 10 0 0.3 0.1 0.1 0.05 0.1 0.2 0.1 0.05 0.1 0.1 0.1 0.05 nom 0.15 100 1000 0 20 40 60 80 100 120 140 160 2 LRF3W 12 8 4 2 1.5 1.5 1.75 5.5 3.61PCB Coppe6.96r Area1.17 per Term0.28ination (0.06mm ) 1.45 Ambient Temperature (C) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK General Note Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 04.10 BI Technologies IRC Welwyn TT Electronics reserves the right to make changes in product specification without notice or liability. 85 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 P/Pr (%) 178 2 80 2 Temperature Rise (C) B 0 G F E W