Ultra Precision Resistors Ultra Precision Welwyn Components Metal Film Resistors Welwyn Components Metal Film Resistors Ultra Precision CAR series Metal Film Resistors Tolerance down to 0.01% CAR series Low TCRs CAR series Tolerance down to 0.01% High reliability Low TCRs Tolerance down to 0.01% Superior moisture performance High reliability Low TCRs Non standard values available High rSuperioreliability moisture performance Highest stability metal film available Superior moisture performance Non standard values available Matched sets and networks Non standard values available Highest stability metal film available Highest stability metal film available Matched sets and networks Matched sets and networks All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2) Electrical Data CAR5 CAR6 CAR7 Notes Electrical Data Power rating at 70C watts 0.25 0.33 0.5 Power rating at 85C watts 0.125 0.25 0.33 CAR5 CAR6 CAR7 Notes Resistance range ohms 10R0 to 3M 10R0 to 5M 10R0 to 10M Power rating at 70C watts 0.25 0.33 0.5 Limiting element voltage volts 250 350 500 Power rating at 85C watts 0.125 0.25 0.33 TCR (20 to +70C) ppm/C 5(V), 10(T), 15(Y), 25(D), 50(C) See tolerance/TCR Resistance range ohms 10R0 to 3M 10R0 to 5M 10R0 to 10M Resistance tolerance % 0.01(L), 0.02(P), 0.05(W), 0.1(B), 0.25(C), 0.5(D) & 1(F) combinations Limiting element voltage volts 250 350 500 Standard values E24, E96 preferred below TCR (20 to +70C) ppm/C 5(V), 10(T), 15(Y), 25(D), 50(C) See tolerance/TCR Thermal impedance C/watt 110 70 60 Resistance tolerance % 0.01(L), 0.02(P), 0.05(W), 0.1(B), 0.25(C), 0.5(D) & 1(F) combinations Ambient temperature range C -55 to +155 Standard values E24, E96 preferred below Thermal impedance C/watt 110 70 60 Ambient temperature range C -55 to +155 Table of Resistance Restrictions Tolerance Table of Resistance Restrictions TCR CAR5 CAR6 CAR7 ppm/C 0.01-0.02% 0.05% 0.1-1% 0.01/0.02% 0.05% 0.1-1% 0.01-0.02% 0.05% 0.1-1% Tolerance 1 5 50 to 300k 10 to 500k 10 to 500k 50 to 500k 10 to 500k 10 to 500k 50 to 750k 10 to 750k 10 to 750k TCR CAR5 CAR6 CAR7 10 50 to 300k 10 to 1M 10 to 1M 50 to 500k 10 to 1M 10 to 1M 50 to 750k 10 to 1M 10 to 1.5M ppm/C 0.01-0.02% 0.05% 0.1-1% 0.01/0.02% 0.05% 0.1-1% 0.01-0.02% 0.05% 0.1-1% 1 15 50 to 300k 10 to 1M 10 to 1M 50 to 500k 10 to 1M 10 to 1M 50 to 750k 10 to 1M 10 to 3.5M 5 50 to 300k 10 to 500k 10 to 500k 50 to 500k 10 to 500k 10 to 500k 50 to 750k 10 to 750k 10 to 750k 25 50 to 300k 10 to 1M 10 to 1.5M 50 to 500k 10 to 1M 10 to 3M 50 to 750k 10 to 1M 10 to 5M 10 50 to 300k 10 to 1M 10 to 1M 50 to 500k 10 to 1M 10 to 1M 50 to 750k 10 to 1M 10 to 1.5M 50 50 to 300k 10 to 1M 10 to 3M 50 to 500k 10 to 1M 10 to 5M 50 to 750k 10 to 1M 10 to 10M 15 50 to 300k 10 to 1M 10 to 1M 50 to 500k 10 to 1M 10 to 1M 50 to 750k 10 to 1M 10 to 3.5M 25 50 to 300k 10 to 1M 10 to 1.5M 50 to 500k 10 to 1M 10 to 3M 50 to 750k 10 to 1M 10 to 5M Note1: Based on sampling. 100% screened product is available. 50 50 to 300k 10 to 1M 10 to 3M 50 to 500k 10 to 1M 10 to 5M 50 to 750k 10 to 1M 10 to 10M Physical Data Note1: Based on sampling. 100% screened product is available. Dimensions (mm) and Weight (g) Physical Data PCB Min mounting Bend Wt. Dimensions (mm) and Weight (g) Type L Max D Max f min d nom. centres Radius nom. PCB Min d CAR5 7.2 2.5 30 0.6 10.2 0.6 0.24 D mounting Bend Wt. L f CAR6 10.0 3.7 30 0.6 12.7 0.6 0.40 Type L Max D Max f min d nom. centres Radius nom. d CAR7 15.5 5.5 30 0.8 18.4 1.2 1.15 CAR5 7.2 2.5 30 0.6 10.2 0.6 0.24 D L f CAR6 10.0 3.7 30 0.6 12.7 0.6 0.40 CAR7 15.5 5.5 30 0.8 18.4 1.2 1.15 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 General Note General Note BI Technologies IRC Welwyn Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Welwyn Components reserves the right to make changes in product specification without notice or liability. TT Electronics reserves the right to make changes in product specification without notice or liability. Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com All information is subject to Welwyns own data and is considered accurate at time of going to print. A subsidiary of All information is subject to TT Electronics own data and is considered accurate at time of going to print. Ultra Precision Ultra Precision Metal Film Resistors Metal Film Resistors CAR series Welwyn Components CAR series Marking Construction Type reference, TCR code, resistance value and tolerance Ceramic rods are coated with a metal film and plated steel code. caps are force fitted. A helical cut is used to adjust the film to The resistance value marking conforms to IEC 62. its final value. Termination wires are welded to the caps and the resistor is Solvent Resistance protected with a specially formulated epoxy coating. The body protection and marking are resistant to all normal industrial cleaning fluids suitable for printed circuits. Terminations Material Solderable finish copper wire. Strength The terminations meet the requirements of IEC 68.2.21 Solderability The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2 Performance Data Values 10 250k Values > 250k Actual Performance Actual Performance Maximum Typical Maximum Typical Load at rated power : 1000 hrs at 70C (or 85C) R % 0.05 0.02 0.25 0.05 Dry heat : 1000 hrs at 155C R % 0.15 0.08 1 0.2 Shelf life : 12 months at room temperature R % 0.01 0.003 0.04 0.02 Derating from rated power at 70C (or 85C) Zero at 155C Zero at 155C Short term overload R % 0.01 0.001 0.08 0.01 Climatic R % 0.05 0.02 0.2 0.05 Climatic category 55/155/56 55/155/56 Long term damp heat R % 0.05 0.02 0.2 0.05 Temperature rapid change R % 0.04 0.02 0.25 0.05 Resistance to solder heat R % 0.02 0.003 0.05 0.005 Vibration and bump R % 0.02 0.002 0.06 0.02 Noise (in a decade of frequency) V/V 0.2 0.03 1 0.1 Voltage coefficient of resistance ppm/V 0.3 <0.05 0.2 <0.05 Figure 1 Application Notes Resistors can be supplied matched for tolerance and TCR 5 down to 0.005% and 1ppm/C, respectively, either as separate resistors or pre-assembled and encapsulated within a plastic box. f f 1 2 The individual resistors within a set or module can be manufactured with a tolerance of 0.01% and a TCR of 6 52 6 5ppm/C. Body location f f 1.4 mm 1 2 General Note BI Technologies IRC Welwyn 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.