High Value Thick Film
Resistors
Thick Film
Resistors
High Value
Resistors
High Value Thick Film
GC Series
Resistors
•
High working voltage to 10kV
GC Series
Value up to
•
High working
1G ohm
to 10kV
voltage
•
GC Series
•
Value up
product available
1G ohm
•
Custom
to
voltage to 10kV
High working
•
Custom product
thick film
•
High stability
available
Values up to 900M
Welwyn Components
Welwyn Components
•
High stability thick film
Custom product available
High stability thick film
Surface mount ZI-form option
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Electrical
Data
Electrical
Data
GC55
GC55
GC65
GC65
GC70
GC70
1.0
47k to 33M
10000
P
ower
r
r
ra
i
ting
t
a
70°
0°C
P
owe
at ng a
t 7
C
Re
si
i
st
tance
range
e
s s
ance
rang
Limi
i
t
t
i
ing
e
elem
nt
n
vo
v
t
olt
e
ge
m
ng leme
e t
l ag
a
s
o a
on olta
ag
I
I
s
ol
l
at
t
i
ion
v
volt
ge
e
TCR (20°C to 70°C)
Values
watts
ohms
volts
ppm/°C
%
°C/watt
watts
0.25
0.25
0.5
0.5
1.0
oh
47k to 90
47
me
t
g
900 m
7k to 900 meg
to 900
47
eg
o 33M
ms
47k
m
k t
0
k o
4
eg
1700
3500
700
100
1,5
E24 & E96 preferred
140
90
Volts d
Vol
r
s
ac
c
ea
r ac Peak
1700
c o
t d
P
o
k
3500
700
100
1,5
90
10000
volts
ppm/°C
%
140
TCR (20°C to 70°C)
Resistance tolerance
Values
The
bi
mal
t
i
emp
ed
at
nc
e range
Am
r
ent
mp
er
a
ur
e
Ambient temperature range
Thermal impedance
Resistance tolerance
E24 & E96 preferred
70
°C
°C/watt
- 55 to 155
70
°C
- 55 to 155
Physical
and Weight (g)
Data
Dimensions (mm)
Dimensions (mm) and Weight (g)
Type
L max.
D max.
2.5
f min.
21.0
d nom.
0.6
PCB
mounting
Min
bend
Wt
GC55
6.2
centres
PCB
radius
Min
nom.
mounting
bend
10.2
0.6
0.3
Physical Data
Wt
nom.
0.3
0.6
d
D
Type
GC65
GC55
GC70
GC65
L max.
9.0
6.2
14.5
9.0
D
f
3.6
max.
19.6
min.
0.8
d nom.
13.7
centres
1.2
2.5
5.3
3.6
21.0
0.8
0.6
20.3
10.2
23.6
1.2
19.6
0.8
13.7
radius
0.6
0.6
1.1
1.2
L
f
d
D
L
f
5.3
23.6
0.8
20.3
Thick film material is fired on to high grade ceramic rods.
Tin plated steel caps are force fitted and the termination
Construction
to the caps. The value is obtained by a
wires are welded
Thick film
in the film
is fired on
the
high grade ceramic
a
helical cut
material
and finally
to
resistor body is given
rods.
Tin plated steel caps are force fitted and the termination
high temperature protective coating.
GC70
14.5
Construction
1.2
1.1
Solderability
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2.
Solderability
The terminations meet the requirements of
Marking
1% tolerance resistors are
IEC 115-1, Clause 4.17.3.2.
colour coded with 5 bands, 2%
and 5% tolerance have 4, IEC 62 colours are used.
Marking
wires are welded to the caps. The value is obtained by a
Terminations
1% tolerance
helical cut in the film and finally the resistor body is given a
Solvent Resistance
resistors are colour coded with 5 bands, 2%
The body protection and marking are resistant
colours are used.
Material
Solder coated copper wire.
and 5% tolerance have 4, IEC 62
to all normal
high temperature protective coating.
Strength
industrial cleaning fluids suitable for printed circuit boards.
The terminations satisfy the requirements of
IEC
Terminations
68.2.21.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning fluids suitable for printed circuit boards.
Material
Strength
General Note
General Note
Solder coated copper wire.
TT Electronics 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.
All information is subject to TT Electronics’ own data and is considered accurate at time of going to print.
The terminations satisfy the requirements of
IEC 68.2.21.
Welwyn Components reserves the right to make changes in product specification without notice or liability.
BI Technologies IRC Welwyn
A subsidiary of
TT electronics plc
http://www.ttelectronics.com/resistors
11.09
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670
© TT Electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
11.16
High Value Thick Film
High Value Thick
Resistors
Resistors
GC Series
GC Series
Film
Welwyn Components
Performance Data
Maximum
Load at rated power: 1000 hrs at 70°c
Derating
Overload
Climatic
Climatic category
Temperature rapid change
Resistance to Solder Heat
Vibration and bump
Voltage proof
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
∆
R%
volts
1
0.2
0.1
1000 min.
1
1
55/155/56
0.15
0.03
0.02
∆
R%
1
Zero at 155°C
0.2
0.25
Typical
0.5
N.B. This product can be custom built to meet specific voltage coefficient or pulse requirements.
Packaging
The standard method of packaging GC resistors is taped in
ammo packs. Taped resistors on reel or loose packed
components can also be supplied by special request. In the
case of tape packed components the usable lead length is
reduced by the width of the tape. A detailed taping
specification is available on request.
These products are also available in a range of lead forming options.
In particular, GC65 & GC70 are available in ZI-form SMD format packed
in blister tape - see:
http://www.ttelectronics.com/themes/ttelectronics/datasheets/resistors/ZI-form.pdf
http://www.ttelectronicsresistors.com/pdf/datasheet/ZI-form.pdf
Type
GC55/GC65
GC70
b
52
67
c
5
10
Figure 2
c
f
1
6
Body Location f
b
1
f
2
6
– f
2
≤
1.4 mm
Ordering Procedure
Example: GC55 at 4.7 megohms and 1% tolerance in ammo pack box of up to 5000 pieces -
GC55
–
4M7F
I
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
F
J
1%
5%
Packing
I
Ammo
GC55
GC65
GC70
Up to 5000/box
Up to 2500/box
Up to 1000/box
Standard
General Note
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.
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670
© TT Electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
BI Technologies IRC Welwyn
http://www.ttelectronics.com/resistors
11.09
11.16
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