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3810 Datasheet(PDF) 1 Page - Welwyn Components Limited |
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3810 Datasheet(HTML) 1 Page - Welwyn Components Limited |
1 / 2 page Ultra-High Value Precision Resistors 3810 Series • Resistance range up to 100 T ohms (1014 ohms) • Designed for low current (pica ampere level) measurements • Low voltage coefficient • Hermetically sealed • Leakage current minimised by hermetic sealing and guard ring 3810 3811 3812 Resistance range ohms 100M to 1T 100M to 1T 1T to 100T Limiting element voltage volts 500 1000 1000 TCR (20°C to 70°C) ppm/°C -500 to -3500 Resistance tolerance % 10, 20 1, 2, 5, 10 1T to 10T; 2, 5, 10 >10T; 5, 10 Values E24 preferred Ambient temperature range °C -40 to 100 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. © 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 Electrical Data Issue D · 03.06 A subsidiary of TT electronics plc Welwyn Components Construction The Cermetox® resistive film is fired onto high quality ceramic substrate; brass end caps are forced fitted to the substrate which is then adjusted to value with a helical 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 utilise two resistors connected in series within the glass envelope. The guard band is described, with application notes, in a Product Information sheet, available on request. Terminations Material Solder-coated Dumet 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 Marking The serial number, resistance value and tolerance code are legend marked. The 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 vapours. (See Application Notes.) Dimensions (mm) & Weight (g) PCB Min. Type L max D max f min d nom mounting Bend Wt. nom Centres Radius 3810 25.0 6 30 0.6 29.2 0.6 1.5 3811 42.9 6 30 0.6 47.1 0.6 2.2 3812 48.0 6 30 0.6 52.2 0.6 2.5 Physical Data L D f d 203 |
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