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| Precision Metal Film Resistors RCP series Welwyn Components * Precision resistors with uprated power * Low TCRs over a wide resistance range * Tolerance down to 0.05% * Low noise and negligible voltage coefficient * Express delivery available Electrical Data RC55P Power rating at 70C Resistance range Limiting element voltage Isolation voltage TCR (20 to +70C) & codes Resistance tolerance (code) Standard values Thermal impedance Ambient temperature range C/watt C 110 watts ohms volts volts ppm/C % 0.5 1R to 4M 350 500 RC65P 1.0 1R to 4M 500 500 RC70P 1.5 1R to 10M 500 700 See resistance restrictions Any value to order 60 Notes 5(V), 10(T), 15(Y), 25(D), 50(C), & 100(Z) 0.05(W), 0.1(B), 0.25(C), 0.5(D), & 1(F) E24, E96 preferred 70 -55 to +155 Physical Data Dimensions (mm) and Weight (g) PCB mounting d nom. centres 0.6 0.6 0.8 10.2 12.7 18.4 Min Bend Radius 0.6 0.6 1.2 Wt. nom. 0.24 0.40 1.15 Type RC55P RC65P RC70P L Max 7.2 10.0 15.5 D Max 2.5 3.7 5.5 f min 30 30 30 d D L f Construction Ceramic rods are coated with a metal film and plated steel caps are force fitted. A helical cut is used to adjust the film to its final value. Termination wires are welded to the caps and the resistor is protected with a specially formulated epoxy coating. Marking Type reference, TCR code, resistance value and tolerance code. The resistance value marking conforms to IEC 62. Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning fluids suitable for printed circuits. Terminations Material Strength Solderability Solder-coated copper wire. The terminations meet the requirements of IEC 68.2.21 The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2 General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn's own data and is considered accurate at time of going to print. A subsidiary of TT electronics plc Issue B * 03.02 (c) 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 176 Precision Metal Film Resistors RCP series Welwyn Components Application Notes Matched Sets and Networks Welwyn has many years experience in the supply of matched sets of precision resistors. Resistors can be supplied matched for tolerance and TCR down to 0.02% and 2ppm/C, either as separate resistors or pre-assembled and encapsulated within a plastic box. The individual resistors within a set or module can be manufactured with a tolerance of 0.05% and a TCR of 5ppm/C. Performance Data RC55P Values 10 100k Actual Performance Maximum Load at rated power : 1000 hrs at 70C Dry heat : 1000 hrs at 155C Shelf life : 12 months at room temperature Derating from rated power at 70C Short term overload Climatic Climatic category Long term damp heat Temperature rapid change Resistance to solder heat Vibration and bump Noise (in a decade of frequency) Voltage coefficient of resistance R % R % R % R % V/V ppm/V 0.25 0.04 0.02 0.2 0.1 R % R % 0.5 0.25 55/155/56 0.05 0.02 0.003 0.002 0.03 <1 0.5 0.2 0.06 0.06 1.0 R % R % R % 0.10 0.3 0.015 Zero at 155C 0.005 0.05 Typical 0.03 0.1 0.003 Other Values/Styles *Actual Performance Maximum 0.5 1.0 0.1 Zero at 155C 0.1 0.3 55/155/56 0.1 0.05 0.03 0.02 0.1 <1 0.02 0.1 Typical 0.1 0.15 0.03 *An 0.01 ahm addition to be added to the performance claims of all resistors <10R. Table of Resistance Restrictions Tolerance TCR ppm/C 5 10 15 25 50 100 0.05% 10R to 1M 10R to 1M 10R to 1M 10R to 1M 10R to 1M RC55P .1-.25% 10R to 1M 5R to 1M 5R to 2M 5R to 2M 1R to 2M .5-1% 1R to 500 1R to 1M 1R to 1M 1R to 2M 1R to 4M 1R to 4M 0.05% 10R to 500 10R to 1M 10R to 1M 10R to 1M 10R to 1M 10R to 1M 10R to 500k 10R to 500k RC65P .1-.25% 10R to 500 10R to 1M 5R to 1M 5R to 2M 5R to 2M 1R to 2M .5-1% 1R to 500 1R to 1M 1R to 1M 1R to 2M 1R to 4M 1R to 4M 0.05% 10R to 1M 10R to 1M 10R to 1M 10R to 1M 10R to 1M RC70P .1-.25% 10R to 1M 10R to 2M 10R to 5M 5R to 10M 1R to 10M .5-1% 1R to 750k 10R to 1M 1R to 2M 1R to 5M 1R to 10M 1R to 10M 10R to 750k 10R to 750k Packaging The standard method of packaging RC55P resistors is taped in ammopacks. Taped resistors on reel or loose packed components can also be supplied by special request. The standard packaging for RC65P and RC70P resistors is loose in boxes. By special request the R65P components can also be supplied taped on reel or in ammopack. In the case of tape packed components the usable lead length is reduced by the width of the tape. Standard Quantities Per Package Type Small box Large box Reel Ammo pack RC55P 250 1000 5000 1000 RC65P 125 500 2500 1000 RC70P 25 250 (c) 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 Issue B * 03.02 177 |
Price & Availability of RCP
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