Precision Metal Film Resistor RC Series • Resistance tolerance down to ±0.05% • Low noise and negligible voltage coefficient • CECC released product with low TCRs over a wide resistance range • 100% tin plated (Pb-free, RoHS compliant) leads Electrical Data RC55 RC65 RC70 Notes Commercial Power Rating At 70°C Watts 0.25 0.5 1.0 Resistance Range Ohms 1R to 4M 1R to 4M 1R to 10M Limiting Element Voltage Volts 350 350 500 Isolation Voltage Volts 500 500 700 TCR (20 to +70°C) & codes ppm/°C Resistance Tolerance 5(V), 10(T), 15(Y), 25(D), 50(C) & 100(Z) Approved CECC 40101-004 See resistance restrictions 0.05(W), 0.1(B), 0.25(C), 0.5(D) & 1 (F) % H J K K L Power Rating At 70°C Watts 0.063 0.125 0.25 0.25 0.5 Resistance Range Ohms 1R to 1M 1R to 1M 1R to 1M 10R to 1M 10R to 1M Volts 200 200 250 250 350 Volts 280 280 350 350 500 Limiting Element Voltage Isolation Voltage TCR & Codes Resistance Tolerance (code) ppm/°C Resistance Range See resistance restrictions 0.05(W), 0.1(B), 0.25(C), 0.5(D) & 1(F) % Approved CECC 40101-804 Power Rating At 70°C 15(Y), 25(D), 50(C) & 100(Z) A B B C Watts 0.125 0.25 0.25 0.5 Ohms 1R to 1M 1R to 1M 10R to 1M 10R to 1M Limiting Element Voltage Volts 200 250 250 350 Isolation Voltage Volts 280 350 350 500 TCR & Codes Resistance Tolerance (code) ppm/°C 15(T), 25(E) & 50(C) % Standard Values Thermal Impedance Ambient Temperature Range See resistance restrictions 0.05(W), 0.1(B), 0.25(C), 0.5(D) & 1(F) E24, E96 Preferred °C/Watt 110 °C 70 60 Any value to order -55 to +155 General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC’s own data and is considered accurate at time of going to print. © IRC Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc RC Series Issue December 2008 Sheet 1 of 3 Precision Metal Film Resistor Physical Data Dimensions (mm) & Weight (g) Type L Max D F Max Min D Nom PCB Mounting Centers Min Bend Radius Wt. Nom RC55 7.2 2.5 30 0.6 10.2 0.6 0.24 RC65 10.0 3.7 30 0.6 12.7 0.6 0.40 RC70 15.5 5.5 30 0.8 18.4 1.2 1.15 d D f L Construction Marking A metal film is deposited onto a high quality ceramic former. Nickel-plated steel caps are force fitted to the former and termination wires are welded to the caps. Type reference, TCR code, resistance value and tolerance code. The resistor is adjusted to value by a helical cut in the film and the body is protected with a specially formulated epoxy coating. Terminations The resistance values conform to IEC 62. Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Material 100% tin plated over copper wire Strength The teminations meet the requirements of IEC 68.2.21. Solderability The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2. Environmental Data CECC 40101-004 CECC 40101-804 *Actual Performance Requirements Requirements Maximum Typical Load At Commercial Rating: 1000 Hours At 70°C ∆R% --- --- 0.3 0.1 Load At CECC Rating: 1000 Hours At 70°C ∆R% 0.5 0.5 0.3 0.05 Dry Heat: 1000 Hours at 155°C ∆R% 0.5 0.5 **1.0 0.15 Shelf Life: 12 Months at Room Temperature ∆R% Derating From Rated Power At 70°C Not specified Not specified 0.1 0.03 Zero at 155°C 50% at 125°C --- --- Short Term Overload ∆R% 0.1 0.1 0.1 0.02 Climatic ∆R% 0.5 0.5 0.3 0.1 Climatic Category 55/155/56 55/155/56 55/155/56 --- Long Term Damp Heat ∆R% 0.5 0.5 0.5 0.1 Temperature Rapid Change ∆R% 0.1 0.1 **0.2 0.05 Resistance To Solder Heat ∆R% 0.1 0.1 0.06 0.03 Vibration and Bump ∆R% 0.1 0.1 0.06 0.02 Noise (in a decade of frequency) µV/V Not specified Not specified 1.0 0.1 ppm/V Not specified Not specified --- <1 Voltage Coefficient Of Resistance Note: *An 0.01 ohm addition to be added to the performance claims of all resistors <10R. ** All products within the specified approved range meet CECC requirements. © IRC Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com RC Series Issue December 2008 Sheet 2 of 3 Precision Metal Film Resistor Table of Resistance Restrictions Tolerance TCR ppm/°C RC55 RC65 0.05% RC70 0.05% 0.1 - 0.25% 0.5 - 1% 0.1 - 0.25% 0.5 - 1% 0.05% 0.1 - 0.25% 0.5 - 1% 5 10 to 500K 10 to 500K 1 to 500K 10 to 500K 10 to 500K 1 to 500K 10 to 750K 10 to 750K 1 to 750K 10 10 to 1M 10 to 1M 1 to 1M 10 to 1M 10 to 1M 1 to 1M 10 to 1M 10 to 1M 1 to 1M 15 10 to 1M 5 to 1M 1 to 1M 10 to 1M 5 to 1M 1 to 1M 10 to 1M 10 to 2M 1 to 2M 25 10 to 1M 5 to 2M 1 to 2M 10 to 1M 5 to 2M 1 to 2M 10 to 1M 10 to 5M 1 to 5M 50 10 to 1M 5 to 2M 1 to 4M 10 to 1M 5 to 2M 1 to 4M 10 to 1M 5 to 10M 1 to 10M 100 10 to 1M 1 to 2M 1 to 4M 10 to 1M 1 to 2M 1 to 4M 10 to 1M 1 to 10M 1 to 10M Application Notes Packaging Matched Sets and Networks Welwyn has many years experience in the supply of matched set of precision resistors The standard method of packaging RC55 resistors is taped in ammo packs. Taped resistors on reel or loose packed components can also be supplied by special request. The standard packaging for RC65 and RC70 resistors is loose in boxes. By special request the RC65 components can also be supplied taped on reel or in ammo pack. In the case of tape packed components the usable lead length is reduced by the width of the tape. Resistors can be supplied matched for tolerance and TCR down to ±0.02% and ±2 ppm/°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 TCR of ±5 ppm/°C. A low inductance version is available at 1% tolerance. For low inductive version add suffix N. 5 Ordering Data Prefix RC - RC55LF C 6K8 B B Type TCR Code 6 V = ±5 ppm/°C, T = ±10 ppm/°C, Y = ±15 ppm/°C D = ±25 ppm/°C, C = ±50 ppm/°C Resistance Value Ex: 6K8 = 6.8KΩ Tolerance Standard Quantities Per Package Type Packaging For additional information or to discuss your specific requirements, please contact our Applications Team using the contact details below. © IRC Advanced Film Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com 6 52 Body location: f1 - f2 ≤ 1.4mm F = ±1%, D = ±0.5%, C = ±0.25%, B = ± 0.1%, A = ±0.05% A = Ammo Pack; B = Bulk; T = Tape and Reel f2 f1 RC55LF, RC65LF, RC70LF RC55 RC65 RC70 Small box 250 125 25 Large box 1000 500 250 Reel 5000 2500 - Large ammo 1000 1000 - RC Series Issue December 2008 Sheet 3 of 3