Ultra-High Value
Ultra-High Value
Precision Resistors
Resistors
Precision
Value
Ultra-High
Resistors
Ultra-High Value
Resistors
•
Resistance range up to 100 T
•
Resistance range up to 100 T ohms
Precision Resistors
ohms
Precision Resistors
(10 ohms)
(10 ohms)
14
3810 Series
14
3810 Series
Welwyn Components
Welwyn Components
Welwyn Components
Welwyn Components
Precision Resistors
Precision Resistors
3810 Series
Ultra-High
Value
3810 Series
Ultra-High Value
(10 ohms)
measurements
(10
14
ohms)
measurements
14
Designed
•
Designed for low
up to
(picoampere
•
•
Resistance range
current
100 T ohms
level)
3810 Series
for low
up to
(picoampere
•
Resistance range
current
100 T ohms
level)
3810 Series
14
Resistance
for
up to 100
(picoampere level)
Resistance range
up
current
ohms (10 ohms)
Designed
rangeup to 100
T
ohms (10 ohms)
Resistance
for low current (picoampere level)
•
Designed
range
low
to 100 TTohms (10
14
14
ohms)
Low voltage
•
•
Low voltage coefficient
•
Designed for low
coefficient
current (picoampere level) measurements
Designed for low
measurements
Designed for low
current (picoampere level) measurements
measurements
current (picoampere level) measurements
Hermetically
•
Low voltage
sealed
Low
Hermetically sealed
Low voltage coefficient
•
Low
voltage
coefficient
•
Low voltage
coefficient
voltage
sealed
•
Hermetically sealed
minimised by hermetic
Leakage current minimised by hermetic
current
•
Hermetically sealed
•
Hermetically sealed
•
Leakage
sealed
•
Leakage current minimised by
Leakage current
guard ring
sealing
sealing and
minimised by
Leakage current minimised by hermetic sealing and guard ring
sealing and guard ring
sealing and guard ring
by hermetic
and guard ring
•
Leakage current minimised
•
Leakage current minimised by hermetic
sealing and guard ring
sealing and guard ring
All parts are Pb-free and comply with EU
Electrical Data
Electrical Data
RResssaanceraange
esi it t nce r nge
Resistance range
Resis
i
t
tin
c
geeee
ge
nt tvvotaage
LLm iti g
e r
l
a
l
n
m n ol lt ge
i im
a
m
Electrical Data
Electrical Data
2011/65/EU (RoHS2)
All
All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2)
parts are Pb-free and comply with EU
2011/65/EU (RoHS2)
Limiting
0°
em
to
t voltage
el
C
en
L
TTCR(
g
2
e
°
em
to
t
7
ol
°C)
e
imi
R
in
20
l
C
en
7
v
0 C)
g
C
t
(
0°
ta
T
R
R
i
(20°C to
tol
0°C)
C
t
7
r
T
Reesss
0
a
C
cetol
0°C
ance
CR
i
(2
a
°
n e
o 7
eea
)
ce
s t nc
t
r n
Resistance tolerance
Resistance tolerance
Values
Values
Values
Values
ient temperature range
Am
A
mb
be
nt
t
te
emp
rat
at
r
ur
ran
ange
A
mb
i
i
e
n t
mpe
er
u e
e r
ge
Ambient temperature range
volts
m/
vol
p
s
m/°°C
p
t
p C
p
ppm/°C
%
ppm/°C
%
%
%
°C
°C
°C
oohms
hms
ohms
volts
ohms
volts
3810
100M to 1T
00
100M to 1T
5 0
50
500
500
10, 20
10, 20
33810
810
100Mtoo11T
38
100M t T
10
110,220
0, 0
°C
3812
3811
3812
100M to 1T
1000
1T to 100T
100M to 1T
1000
1T to 100T
11000
000
1000
-500 to -3500
1000
1000
-500 to -3500
1000
-500 to -3500
2 5 10
1T to 10T; 2, 5, 10 >10T; 5, 10
-500 to -350
1,2, ,5, ,10
1
0
,
1T to 10T; 2, 5, 10 >10T; 5, 10
1, 2, 5, 10
1T to 10T; 2, 5, 10 >10T; 5, 10
1, 2, 5, 1
E24 preferred
to 10T; 2, 5, 10 >10T; 5, 10
0
1T
E24 preferred
E24 preferred
E24 preferred
0 to 100
-
-44
-40 to 100
0 to 100
-40 to 100
33811
811
100Mtoo11T
3811
100M t T
33812
812
1Ttoo1100T
t 00T
1T
Physical Data
Physical
Data
Physical
Data
Physical Data
Dimensions (mm) & Weight
Dimensions
(mm)
Weight (g)
Dimensions
(mm) &
& Weight (g)
Dimensions (mm) & Weight (g)
(g)
Type
Type
Type
Type
3810
3810
3810
3810
3811
3811
3811
3811
3812
3812
3812
L max
max
L max
LLmax
25.0
25.0
25.0
25.0
42.9
42.9
42.9
42.9
48.0
48.0
48.0
PCB
PCB
Min.
Min.
PCB
PCB
Min.
Min.
D max
mounting
Bend Wt.
D max
min
min
nom
nom mounting Bend
nom
Wt.nom
D max
Wt.
D max
f fmin
fmin
ddnom
nom mounting
f
dd
mounting Bend
Bend
nom
nom
Wt.
Centres Radius
Radius
Centres Radius
Centres Radius
Centres
6
6
30
30
0.6
0.6
29.2
29.2
0.6
0.6
1.5
1.5
6
6
30
30
0.6
0.6
29.2
29.2
0.6
0.6
1.5
1.5
6
6
30
30
0.6
0.6
47.1
47.1
0.6
2.2
0.6
2.2
6
6
30
30
0.6
0.6
47.1
47.1
0.6
0.6
2.2
2.2
6
30
0.6
52.2
0.6
2.5
6
6
30
30
0.6
0.6
52.2
52.2
0.6
2.5
0.6
2.5
d
d
d
D
d
D
D
D
LL
f
LL
f
ff
3812
48.0
6
30
0.6
52.2
0.6
2.5
Construction
Construction
Construction
®
The Cermetox resistive film is fired onto high quality ceramic
The
Marking
resistance value and tolerance code are legend
number,
Construction
The Cermetox
®
resistive film is fired onto high quality ceramic
The serialnumber, resistance value and tolerance code are legend
TheCermetox
®®
resistive
are forced fitted to
high quality ceramic
serial The
serialnumber, resistance
conforms to
tolerance code are legend
Cermetox
end caps
film is fired onto
the substrate
ceramic
resistive film is fired onto high quality
Theserial number, resistancevalue and tolerance code are legend
substrate; brass
marked.
The
The
resistance value marking
value and
IEC 62.
substrate; brass end caps are forced fitted to the substrate
marked. The resistance value marking conforms to IEC 62.
substrate; brass end caps are forced fitted to the substrate
marked. The resistance value marking conforms to IEC 62.
which is then adjusted to value
forced fitted to the substrate
substrate; brass end caps are
with helical cut in the film;
marked. The resistance value marking conforms to IEC 62.
which is then adjusted to value with aahelical cut in the film;
which is then adjusted
locked
with helical cut in the
Solvent Resistance
the leads are mechanicallylocked into the end caps and
the
which is then adjusted to valuewith aahelical cut in
the
film;
the leads are mechanically
to value
intothe end caps and the
film;
SolventResistance
assembly
are
into the glass
locked into
close tolerance
the leadsare mechanically
envelope. All close tolerance
Solvent
is coated with
assembly sealed
mechanicallylocked into the end caps and the
The glass envelope
Resistance
silicone and should not be
the leads
sealedinto the glass envelope. All
the end caps and the
The glass envelopeis coated with silicone and should not be
Solvent Resistance
units utilise
sealed into
connected in series within the
tolerance
subjected to
glass envelope is coated
(See Application
assembly
two resistors connected in series
All close
glass
The
solvents or their
coated with silicone and should not be
units utilise
sealed into the glass envelope.
within the
tolerance
subjected to
glass envelope is
vapours.(See Application
assembly
two resistors
the glass envelope.All close
glass
The
solvents or their vapours.
with silicone and should not be
envelope. Theguard band is
connected
withapplication
units utilise
guard band described,
in
application
envelope. The
two resistors
isdescribed, with
serieswithin the glass
Notes.)
subjectedto solvents or their vapours. (See Application
Notes.)
subjected to solvents or their vapours. (See Application
units utilise two resistorsconnected in series within the glass
at
The guard band is described, with application
notes,at
notes,
envelope.
Notes.)
http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/literature/3810_AN.pdf
envelope. The guard band is described, with application
Notes.)
http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/literature/3810_AN.pdf
Marking
Marking
Marking
The terminations meet the requirements of
The terminations meet the requirements of
Solderability
The terminations meet the requirements of
IEC 68.2.21
Solderability
The terminations meet the requirements of
IEC 68.2.21
Solderability
The terminations meet the requirements of
Solderability
The terminations meet the requirements of
General Note
IEC 115-1, Clause 4.17.3.2
General
Note
General
Note
Welwyn
Note
reserves
115-1,
to make changes in product specification without notice or liability.
IEC
the right make changes in product
General
Componentsreserves the right to
Clause 4.17.3.2
specification without notice or liability.
Welwyn Components
All information is
General Note
subject to Welwyn’s own data and is considered accurate at time of going to print.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
Material
Solder-coated Dumet wire.
Terminations
Material
Solder-coated Dumet wire.
Terminations
Material
Solder-coated Dumet
requirements of
Strength
The terminations
Dumet wire.
Material
Solder-coated
meet therequirements of
Strength
The terminations meet the
wire.
IEC 68.2.21
IEC 68.2.21
Terminations
Terminations
notes, in Product Information sheet, available on request.
notes, in aaProduct Information sheet, available on request.
Strength
Strength
IEC 115-1, Clause 4.17.3.2
IEC 115-1, Clause 4.17.3.2
All information is subject to TT Electronics’ own data and is considered accurate at
notice
going to print.
TT Electronics reserves
to
right to make
own data
product specification without
time of
or liability.
All
General
is subject
the
TT Electronics’
changes in
and is considered accurate at time of going to print.
information
©
information
Note
Welwyn
is
Components Limited
· Bedlington,
General Note
to TT Electronics’ own data and
Northumberland NE22 7AA, UK
All
Welwyn Components Limited
·
to make
is
Northumberland NE22 7AA,
going to print.
subject
©
Welwyn Components reserves
·
the right
Bedlington,
considered accurate at time of
UK
without notice or liability.
Telephone: +44 (0)
plc
reserves the right to make
1670 829465
productspecification without
Website: www.welwyn-tt.com
Facsimile: +44 (0)
changes in
Email:
specification
Welwyn
+44 (0) 1670 822181· Facsimile: +44 (0) 1670 829465 · ·Email: info@welwyn-tt.com· ·Website:
or liability.
notice
www.welwyn-tt.com
© TT Electronics
1670
Telephone:
Components
822181
Welwyn’s own data changes in product
info@welwyn-tt.com
going to print.
©
All information is subject to
TT Electronics plc
and is considered accurate at time of
BI Technologies IRC Welwyn
BI Technologies IRC
A
Welwyn
subsidiary of
A subsidiary
BI Technologies IRC
electronics of
Welwyn
TT
plc
© TT Electronics plc
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
© Welwyn Components Limited
· ·Bedlington, Northumberland NE22 7AA, UK
TT electronics plc
www.ttelectronicsresistors.com
www.ttelectronicsresistors.com
Issue D · 03.06
www.ttelectronics.com/resistors
Issue D · 03.06
A subsidiary of
A subsidiary
07.16
TT electronics of
plc
203
07.16
TT electronics plc
203
11.17
Ultra-High Value
Ultra-High Value
Precision Resistors
Precision Resistors
3810 Series
3810 Series
Welwyn Components
Performance Data
Maximum
Load at rated voltage: 1000 hours at 20°C
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
100MΩ
3810
3811
3812
-20
-10
-10
1TΩ
-160
-80
-80
ppm/volt
100TΩ
Measured at voltages
of 100 and 500 volts
-150
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 70°C 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, see
http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/literature/3810_AN.pdf
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 TT Electronics.
Packaging
Each resistor is individually packed in a polythene envelope
together with a card carrying measurement details and serial
number (See Application Notes).
Ordering Procedure
Example: 3812 at 10 teraohms and 2% tolerance -
3812
–
10TG
I
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
F
G
1%
2%
J 5%
K 10%
Packing
I
Individual/Bulk
Standard
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
General Note
General
+44 (0)
BI Technologies
Telephone:
Note
1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
TT Electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
Welwyn
BI Technologies
IRC
Issue D · 03.06
www.ttelectronics.com/resistors
www.ttelectronicsresistors.com
© TT Electronics plc
© TT Electronics plc
11.17
07.16
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