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3810 Datasheet(PDF) 1 Page - Welwyn Components Limited

Part # 3810
Description  Ultra-High Value Precision Resistors
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Manufacturer  WELWYN [Welwyn Components Limited]
Direct Link  http://www.welwyn-tt.com/
Logo WELWYN - Welwyn Components Limited

3810 Datasheet(HTML) 1 Page - Welwyn Components Limited

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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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