High Value Thick Film
Welwyn Components
Resistors
Resistors
High Value Thick Film
Welwyn Components
Resistors
High Value Thick Film
GC Series
Resistors
High working voltage to 10kV
GC Series
Value up to 1G ohm
High working voltage to 10kV
GC Series
Custom product available
Value up to 1G ohm
High working voltage to 10kV
High stability thick film
Custom product available
Values up to 900M
High stability thick film
Custom product available
High stability thick film
Surface mount ZI-form option
AllAll Pb-Pb-frfreeee partsparts ccomplyomply withwith EUEU DirDirectivectivee 2011/65/EU2011/65/EU amended amended b yb y(EU) (EU) 2015/863 2015/863 (R (RoHS3)oHS3)
Electrical Data
Electrical Data
GC55 GC65 GC70
GC55 GC65 GC70
Power rating at 70 C watts 0.25 0.5 1.0
Power rating at 70 C watts 0.25 0.5 1.0
RReessiissttaannccee r arnagnege ohms ohm4s7 K t o 90 40M7 K t o 90 0M47K to 900M 47K to 900M 47K to 33M 47K to 33M
Limiting element voltage Volts dc or ac Peak 1700 3500 10000
Limiting element voltage Volts dc or ac Peak 1700 3500 10000
Isolation voltage volts 700
Isolation voltage volts 700
TCR (20 C to 70 C) ppm/ C 100
TCR (20 C to 70 C) ppm/ C 100
Resistance tolerance % 1 ,5
Resistance tolerance % 1 ,5
Values E24 & E96 preferred
Values E24 & E96 preferred
Thermal impedance C/watt 140 90 70
Thermal impedance C/watt 140 90 70
Ambient temperature range C - 55 to 155
Ambient temperature range C - 55 to 155
Physical Data
Physical Data
Dimensions (mm) and Weight (g)
PCB Min
Dimensions (mm) and Weight (g)
mounting bend Wt
PCB Min
Type L max. D max. f min. d nom. centres radius nom.
d
mounting bend Wt
D
GC55 6.2 2.5 21.0 0.6 10.2 0.6 0.3
L
f
Type L max. D max. f min. d nom. centres radius nom.
GC65 9.0 3.6 19.6 0.8 13.7 1.2 0.6
d
D
GC55 6.2 2.5 21.0 0.6 10.2 0.6 0.3
GC70 14.5 5.3 23.6 0.8 20.3 1.2 1.1
L
f
GC65 9.0 3.6 19.6 0.8 13.7 1.2 0.6
GC70 14.5 5.3 23.6 0.8 20.3 1.Solderability2 1.1 The terminations meet the requirements of
Construction
IEC 115-1, Clause 4.17.3.2.
Thick film material is fired on to high grade ceramic rods.
Tin plated steel caps are force fitted and the termination
Solderability The terminations meet the requirements of
Construction
Marking
wires are welded to the caps. The value is obtained by a
IEC 115-1, Clause 4.17.3.2.
Thick film material is fired on to high grade ceramic rods.
1% tolerance resistors are colour coded with 5 bands, 2%
helical cut in the film and finally the resistor body is given a
Tin plated steel caps are force fitted and the termination and 5% tolerance have 4, IEC 62 colours are used.
high temperature protective coating.
Marking
wires are welded to the caps. The value is obtained by a
Solvent Resistance
Terminations
1% tolerance resistors are colour coded with 5 bands, 2%
helical cut in the film and finally the resistor body is given a
The body protection and marking are resistant to all normal
Material Solder coated copper wire.
and 5% tolerance have 4, IEC 62 colours are used.
high temperature protective coating.
industrial cleaning fluids suitable for printed circuit boards.
Strength The terminations satisfy the requirements of
IEC 68.2.21. Solvent Resistance
Terminations
The body protection and marking are resistant to all normal
Material Solder coated copper wire.
industrial cleaning fluids suitable for printed circuit boards.
Strength The terminations satisfy the requirements of
General Note
General Note
IEC 68.2.21.
BI Technologies IRC Welwyn
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.
A subsidiary of
All information is subject to Welwyns 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.
TT electronics plc
www.ttelectronics.com/resistors
Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK
11.09
TT Electronics plcTelephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info@welwyn-tt.com Website: www.welwyn-tt.com
03.19
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
A subsidiary of
All information is subject to Welwyns own data and is considered accurate at time of going to print.
TT electronics plc
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 11.09High VHighalue Thick Film Value Thick Film
Resistors
Resistors
GC Series Welwyn Components
GC Series
Performance Data
Maximum Typical
Load at rated power: 1000 hrs at 70c R% 1 0.5
Derating Zero at 155C
Overload R% 1 0.2
Climatic R% 1 0.25
Climatic category R% 55/155/56
Temperature rapid change R% 1 0.15
Resistance to Solder Heat R% 0.2 0.03
Vibration and bump R% 0.1 0.02
Voltage proof volts 1000 min.
N.B. This product can be custom built to meet specific voltage coefficient or pulse requirements.
Packaging
Figure 2
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
c
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.
f f
1 2
In particular, GC65 & GC70 are available in ZI-form SMD format packed
6 b 6
in blister tape - see: