8G16D 1K 0.1 Rhopoint

PRECISION WIREWOUND RESISTORS ECONISTOR (8E16 & 8E24) FEATURES SPECIFICATIONS Tolerance at 25C: 3ppm per degree Centigrade temperature co-efficient 0.005%, 0.01%, 0.1% Full load stability 50ppm maximum after three years Temperature Co-efficient: 3ppm/C typical over 0C to +85C Tolerance 0.005%, 0.01% and 0.1% 5ppm maximum over 55C to +125C Full Load Stability: Axial leads 35ppm/10,000hours 50ppm/26,000 hours From stock in 111 popular standard values to order in No Load Stability: 25ppm/10,000 hours over full temperature range any value from 1 ohm to 1.1 Meg 35ppm/26,000 hours 55C to +125C Power Rating: OHMIC VALUES 0.33 watt (+85C) 0.25 watt (+110C) Econistors are available in 111 standard values from 1 to 1M Maximum Continuous Working Voltage: Up to 250V DC or peak as determined by PR and in any non-standard values from 1 to 1.1M. Three Noise: Thermal EMF: tolerances are available 0.1%, 0.01% and 0.005% (0.005% Essentially non-measurable <0.4V/C typical <1.5V/C maximum available on values of 100 and above only). Type 8E16 Encapsulation: Leads: Moulded epoxy 22 AWG tinned copper includes all values below 700K values of 700K and above Windings: are type 8E24. The types are identical except dimensionally Balanced multiple for low reactance. Exclusive air cushion technique Type 8E16 is 12.7mm long, Type 8E24 is 19.05mm long. Both provides virtually stressless elements for improved performance. Non- inductively wound. Direction of winding reversed at half turns point. are manufactured using all welded construction. Stocked in 0.1% and 0.01% in listed values shown below 1 103.90 194.07 680 * 4.7K * 27K * 180K 2 107.79 200.00 700 5.0K 30K 200K 5 109.73 212.02 800 5.6K * 33K * 250K 10 111.67 220.00 * 820 * 6.0 39 300 20 115.54 229.67 900 6.8 * 40 320 * 30 119.40 247.04 1.0 7.0 47 * 400 40 120.00 250 1.2 * 8.0 50 500 50 123.24 270 * 1.5 8.2 * 56 * 990 60 125.00 300 1.8 * 9.0 60 1 60.25 127.07 330 * 2.0 9.9 68 * 62.50 * 130.89 350 2.2 10.0 70 Any non-listed 70 134.70 390 * 2.5 12.0 * 80 value from 80 138.50 400 2.7 * 15.0 * 82 * 84.27 150.00 * 470 * 3.0 18.0 * 90 1 to 1.1M 90 157.31 500 3.3 * 20.0 99 available to order 92.16 175.84 560 * 3.9 * 22.0 * 100 100 180.00 * 600 4.0 25.0 160 * * Stocked in 0.1% tolerance only. Stocked in 0.01% tolerance only. A number of values listed are RTD simulation values. See page 6 for temperature equivalents. Holland Road, Hurst Green, Oxted, Surrey, RH8 9AX, England RHOPOINT Tel: Oxted 01883717988 Fax: Oxted 01883 712938 2 COMPONENTS LTD Outside UK Tel: +44 1883 717 988 Fax: +44 1883 712 938PRECISION WIREWOUND RESISTORS ECONISTOR (8E16 & 8E24) Resistance Wire Highest quality copper alloy wire drawn from melts of known resistivity and controlled temperature co-efficient. Accuracy Calibration is as 25C against equipment traceable to NBS (United States). During calibration, the electrical connection is made 10mm ~ along the lead-out wires from the body. Operating Temperature The maximum operating temperature due to ambient and power dissipation within the resistor is 160C. Solvent Resistance The body material and identification marking is resistant to all commonly used PC board solvents. Lead Pull Strength 2kg (limited only by inherent strength of copper lead material). Resistance of Termination Leads Type 8E16 = 0.52m Ohms/cm Type 8E24 = 0.33m Ohms/cm Voltage Co-efficient Essentially zero Manufacturing The highest quality materials are used all processing is performed in temperature/humidity controlled clean rooms, each step is carefully monitored. Thermal EMFS The temperature difference between the two copper to resistance wire joins is the critical factor. If the two junctions are at the same temperature, then the effect of thermal EMFs is minimised. The construction of Econistors is such that the two junctions are not more than 2mm apart, thus reducing any possibility of temperature difference almost to zero. This largely negates the effect of thermal EMFs in Econistors. The thermal EMF of the resistance material to copper join for Econistors is typically <0.4V/C. CONSTRUCTION Econistors are wound on a proprietary multi-section bobbin with the termination wires moulded deep into the body of the bobbin. Each copper to resistance wire join is thus positioned near to the centre of the resistor and spaced apart from each other by only 2mm. This is an important factor in minimising the effect of thermal EMFs (see separate note on thermal EMFs). This method of construction also effectively isolates the fine resistance wire mechanically from the termination wires. To minimise inductance, the direction of winding is reversed at the half turns point. During the manufacturing process each resistor undergoes an ageing process for a minimum of one week in a temperature controlled oven in order to completely stabilise the winding prior to calibration. Econistors are encapsulated in a moulded epoxy shell which fully seals the winding. ORDERING PROCEDURE EXAMPLE: 8 E 1 6 A 10 K ll l Style and general Tolerance: R value in Ohms specifications X = 0.005% A = 0.01% D = 0.1% Matched pairs and ratio matched resistors are available against specific enquiries. 3