3810

Ultra-High Value Precision Resistor 3810 Series • Low Voltage • Hermetically sealed • Resistance range up to 100T ohms (10 ohms) • Designed for low current (pica ampere level) measurements • Leakage current minimised by hermetic sealing and guard ring Flexible connecting coil Solder coated leads 14 Glass to metal seal Glass Envelope Electrical Data IRC Type 3810 3811 3812 Resistance Range (ohms) 100M to 1T 100M to 1T 1T to 100M Limiting Element Voltage (volts) 500 1000 1000 -500 to -3500 TCR Resistance (20°C - 70°C) Tolerance ppm/°C (%) 10, 20 1, 2, 5, 10 2, 5, 10 EIA 2% values preferred -40 to 100 Values Operating Temperature Range (°C) Voltage Coefficient of Resistance (measured at voltages of 100 & 500 volts) ppm/volt 100MΩ -20 -10 -10 1TΩ -160 -80 -80 -150 -150 100TΩ CONSTRUCTION: The Cermetox resistive film is fired onto a high quality ceramic substrate; brass end caps are force fitted to the substrate which is then adjusted to value with a hellical cut in the film; the leads are mechanically locked into the end caps and the assembly sealed into the glass envelope. All close tolerance units utilize two resistors connected in series within the glass envelope. High value units, type 3812, are part filled with silicone oil. the guard band is described, with application notes, in a Product Information sheet, available on request. TERMINATIONS: Solder-coated dumet-wire. MARKING: Type reference, TCR code, resistance value and tolerance code are legend marked. Resistance value marking conforms to IEC 62. SOLVENT RESISTANCE: The glass envelope is coated with silicone and should not be subjected to solvents or their vapors. (See application notes.) PACKAGING: Each resistor is individually packed in a polythene envelope together with a card carrying measurement details and serial number. (See application notes.) Performance Data Typical Load at Rated Voltage (1000 hrs at 20°C) ∆R% 1 Shelf Life (12 months at room temperature) ∆R% 0.5 Resistance To Solder Heat ∆R% Inductance Low inductance versions available in the range 100M to 1T Capacitance pF 3810 0.4 3811 0.2