Small Size Low Value Current Sense Surface Mount Chip Resistors LRCS Series 0402, 0603 and 0805 sizes (larger sizes refer to our LRF Series) Resistance R020 (20m ) to 1R0 (1000m ) Designed for current sensing in power electronic systems RoHS compliant Electrical Data LRCS0402 LRCS0603 LRCS0805 Power rating @70°C watts 0.063 0.1 0.125: R02 to <R10 0.25: R10 to 1R0 Resistance range ohms R05 to 1R0 R02 to 1R0 R02 to 1R0 Isolation voltage volts 50V 100V 200V ±400: R05 R10 ±300: R101 R50 ±200: R501 1R0 ±600: R02 R05 ±400: R051 R10 ±300: R101 R50 ±200: R501 1R0 ±600: R02 R05 ±400: R051 R10 ±300: R101 R50 ±200: R501 1R0 TCR ppm/°C Resistance tolerance % 1(F), 5(J) Standard values E24 preferred Ambient temperature range °C -55 to +155 Physical Data L W T D1 D2 Nom wt. (g) LRCS0402 1.00 ±0.05 0.50 ±0.10 0.32 ±0.10 0.25 ±0.10 0.20 ±0.10 0.0007 LRCS0603 1.60 ±0.10 0.80 ±0.10 0.45 ±0.10 0.30 ±0.20 0.30 ±0.20 0.002 LRCS0805 2.00 ±0.15 1.25 ±0.15 0.55 ±0.10 0.30 ±0.20 0.40 ±0.25 0.005 All dimensions in mm unless stated. Construction A resistor element is applied to an alumina substrate. The product is adjusted to value and protected. Marking is applied to 0603 and 0805 sizes. A wraparound conductor is applied to join the top and bottom sides. The terminations are electroplated with a Ni barrier layer prior to plating with a Sn finish. Solvent Resistance The body protection and marking are resistant to all normal industrial solvents suitable for printed circuits. Flammability The resistor will not burn or emit incandescent particles under any condition of applied temperature or overload. Solderability 95% min coverage (MIL-STD 202F / 208H, 235C 2 secs) 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. © Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: [email protected] Website: www.welwyn-tt.com A subsidiary of TT electronics plc Issue C . 11.06 LRCS Series Marking The LRCS0402 is not marked, the LRCS0603 is marked with 3 digits and LRCS0805 with 4 digits. e.g. 100m is marked as R10 (3digit) and R100 (4digit) and 35 m is marked as 035 (3digit) or R035 (4digit) Mounting A B C LRCS0402 LRCS0603 0.6 0.4 0.50±0.2 1.0 0.7 1.00±0.2 LRCS0805 1.0 0.8 1.30±0.2 Type A C B Performance Data Maximum Load at rated power (1000hrs cyclic load at 70°C) R% ±1% + 0.05 De-rating from rated power at 70°C See Graph R% Short term overload (6.25 x rated power for 5s) ±0.5% + 0.05 ±1% + 0.05 (0.25W LRCS0805 rating) Dry heat (96Hrs, no load, +155°C) R% ±0.5% + 0.05 Temperature rapid change (-55 / +150ºC, 100 cycles) R% ±0.5% + 0.05 Damp heat steady state R% ±0.5% + 0.05 Resistance to solder heat (260ºC for 10s) R% ±0.5% + 0.05 Low Temperature Operation R% ±0.5% + 0.05 Insulation Resistance >1000M Power de-rating graph 100% T°C 0% -55 Packaging 70 155 The standard packing for LRCS parts is on 8mm wide paper tape wound on 178mm diameter reels. Ordering Procedure Example: LRCS0603 at 25 milliohms and 1% tolerance on reel of 5000 pieces: LRCS0603 R 0 2 5 F T5 Type Value (use IEC62 code) Tolerance (use IEC62 code) F 1% J 5% Packing T10 Tape 0402 10,000 / reel T5 Tape 0603 5,000 / reel T5 Tape 0805 5,000 / reel © Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: [email protected] Website: www.welwyn-tt.com Issue C . 11.06