 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Ultra-High Value Precision Resistors 3810 Series Welwyn Components * 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 Electrical Data 3810 Resistance range Limiting element voltage TCR (20C to 70C) Resistance tolerance Values Ambient temperature range C ohms volts ppm/C % 10, 20 100M to 1T 500 3811 100M to 1T 1000 -500 to -3500 1, 2, 5, 10 E24 preferred -40 to 100 1T to 10T; 2, 5, 10 >10T; 5, 10 3812 1T to 100T 1000 Physical Data Dimensions (mm) & Weight (g) Type 3810 3811 3812 L max 25.0 42.9 48.0 D max 6 6 6 f min 30 30 30 d nom 0.6 0.6 0.6 PCB mounting Centres 29.2 47.1 52.2 Min. Bend Radius 0.6 0.6 0.6 Wt. nom d 1.5 2.2 2.5 D L f Construction The Cermetox(R) 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. 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.) Terminations Material Strength Solder-coated Dumet wire. 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 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 D * 03.06 (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 203 Ultra-High Value Precision Resistors 3810 Series Welwyn Components Performance Data Maximum Load at rated voltage: 1000 hours at 20C Shelf life: 12 months at room temperature Resistance to solder heat Capacitance 3810 3811 R% R% R% pF pF 2 1 0.2 0.4 0.2 Typical 1 0.5 <0.1 Voltage coefficient of resistance 100M 3810 3211 3812 -20 -10 -10 1T -160 -80 -80 ppm/volt 100T -150 -150 Measured at voltages of 100 and 500 volts Application Notes Each resistor is packed with a card stating nominal resistance value at 100 V applied, selection tolerance, date and serial number. Although the glass envelope is an excellent insulant and would be adequate in a dry atmosphere, the condensation which occurs in a normal atmosphere will provide a shunt resistance which will modify the very high resistance value. To minimise this effect all units are coated with silicone, and it is essential that this coating is not damaged; any handling should be by the terminations. For the same reason solvents must not be used. The resistors should not be used in a damp atmosphere. If moisture develops on the body the resistor should be dried for 30 minutes at 70C and allowed to cool for a further 30 minutes in a dry atmosphere. To avoid damage to the seal between terminations and glass, the leads must be fully supported inside the point of bending during any preforming. Guard Band For details of how to use the guard band, fitted to resistors of 100 G ohms and over, ask for Product Information Sheet detailing application notes for glass sealed resistors with guard band. Non-standard versions Units without glass envelopes but with lacquer protection are available, but will have a limited electrical performance. Measured values at a voltage other than 100V may be recorded. For non-standard items contact Welwyn Components. Packaging Each resistor is individually packed in a polythene envelope together with a card carrying measurement details and serial number (See Application Notes). (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 204 Issue D * 03.06 |
Price & Availability of 3811
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |