igh Value Thick Film
esistors
Value Thick Film
High
Value Thick Film
Resistors
Resistors
·
·
·
·
Welwyn Component
Welwyn Components
Series
GC Series
GC Series
igh working voltage to 10kV
High working voltage to 10kV
High
ohm
alue up to 1G
working voltage to 10kV
Value up to 1G ohm
Value up to 1G ohm
Custom product available
ustom product available
Custom product available
High stability thick film
igh stability thick film
film
High stability thick
Electrical Data
GC55
watts
ohms
Volts dc or ac Peak
0.25
47k to
GC55
eg
900 m
1700
GC65
0.5
47k to 900 m
GC65
eg
3500
700
GC70
1.0
47k to 1G
10000
Power rating at 70°C
Resistance range
Limiting element voltage
Isolation voltage
ectrical Data
GC70
1.0
47k to 1G
10000
er rating at 70°C
watts
volts
0.25
0.5
to 900 meg
3500
700
stance range
TCR (20°C to 70°C)
Values
Thermal impedance
oh
m/
s
C
pp
m
°
%
Volts dc or ac Peak
°C/watt
47k to 900 meg
1700
140
4
0
10
7k
1, 2, 5
90
esi
l
t
ag
e
ting element
R
vo
s
t
anc
e
tolerance
tion voltage
volts
%
E24 & E96 preferred
(20°C to 70
A
C)
bient temperature range
°
m
ppm/°C
C
°
100
- 55 to 155
1, 2, 5
70
stance tolerance
es
Physical Data
Dimensions (mm) and Weight (g)
PCB
D max.
2.5
3.6
f min.
21.0
19.6
23.6
d nom.
0.6
0.8
0.8
mounting
centres
10.2
13.7
20.3
E24 & E96 preferred
°C/watt
°
Min
C
bend
radius
0.6
1.2
1.2
Wt
nom.
0.3
0.6
1.1
d
mal impedance
140
90
- 55 to 155
70
bient temperature range
Type
ysical Data
GC55
GC65
L max.
6.2
9.0
D
L
f
GC70
14.5
5.3
ensions (mm) and Weight (g)
mounting
bend
Thick film material is fired on to high grade ceramic rods.
L max.
plated steel caps
min.
f
are force
d nom.
the termination
radius
Tin
D max.
fitted and
centres
the
6.2
wires are welded to
21.0
caps. The value is obtained by a
2.5
0.6
10.2
0.6
Construction
PCB
Min
5
nom.
Marking
0.3
Solderability
The terminations meet the requirements of
Wt
IEC 115-1, Clause 4.17.3.2.
D
L
f
1% tolerance resistors are colour coded with 5 bands, 2%
0.6
and 5% tolerance have 4, IEC 62 colours are used.
d
5
9.0
helical cut in the film and finally the resistor body is given a
3.6
19.6
0.8
13.7
1.2
high temperature protective coating.
0
14.5
5.3
Terminations
Material
23.6
0.8
20.3
1.2
1.1
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning
The terminations meet the requirements
Solderability
fluids suitable for printed circuit boards.
IEC 115-1, Clause 4.17.3.2.
film material is fired
ated steel caps are force fitted and the termination
Marking
are welded to the caps. The value is obtained by a
General
and
1% tolerance resistors are colour coded with 5 bands, 2%
General
Note
al cut in the film
Note
finally the resistor body is given a
Welwyn Components reserves the right to make changes in product specification without notice or liability.
TT electronics reserves the right to make changes in product specification without notice or liability.
subsidiary of
and
print.
All information is subject to Welwyn’s
temperature
information is subject
coating.
own
own data and is considered accurate
time
time
going to print.
tolerance have 4, IEC 62 colours
A
are used.
protective
to TT electronics’
data and is considered accurate at
at
of
of going to
5%
All
© 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
TT electronics plc
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
11.09
10. 11
struction
Strength
Solder coated copper wire.
The terminations satisfy the requirements of
on to high grade ceramic rods.
IEC 68.2.21.
of
minations
Solvent Resistance
The body protection and marking are resistant to all normal
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.
Type
GC55/GC65
GC70
b
52
67
c
5
10
Figure 2
c
f
1
6
b
f
2
6
Body Location f
1
– f
2
≤
1.4 mm
Ordering Procedure
Example: GC55 at 4.7 megohms and 2% tolerance in ammo pack box of up to 5000 pieces -
GC55
–
4M7G
I
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
F
G
J
1%
2%
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.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, UK
11.09
Telephone: +44 (0) 1670
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
10. 11
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