Welwyn GCF3S General purpose carbon film resistor Datasheet

General Purpose
Carbon Film Resistors
GCF Series
Drop in replacement for CF/CR
Low cost
Extensive resistance range
Wide range of sizes and power ratings
RoHS compliant
Electrical Data
GCF¼
GCF¼S
GCF½
GCF½S
GCF1
GCF1S
GCF2
GCF2S
GCF3S
0.25
0.25
0.5
0.5
1
1
2
2
3
Power rating @70°C
watts
Resistance range
ohms 1R0-1M0 1R0-10M 1R0-1M0 1R0-10M 1R0-10M 1R0-10M 1R0-10M 1R0-10M 1R0-10M 1R0-10M
0.125
Limiting element voltage
volts
200
250
200
350
250
500
400
500
500
500
Max overload voltage
volts
400
500
400
700
500
1000
700
1000
800
1000
volts
300
500
300
700
500
1000
700
1000
700
1000
Dielectric withstanding voltage
TCR
ppm/°C
Resistance tolerance
<10R
:
0±350
<10R ~ <60K
:
0 ~ -500
<60K ~ <200K
:
0 ~ -700
<200K ~ <1M0
:
0 ~ -1000
<1M0K ~ 10M
:
0 ~ -1500
±5
%
Standard values
E24
Ambient temperature range
°C
-55 to +155
Note: 'S' denotes smaller body size - see physical data
Physical Data
min. Bend
Radius
Wt. nom.
7.6
0.5
0.1
0.55
10.2
0.55
0.3
25
0.5
7.6
0.5
0.1
3.5
25
0.6
15.2
0.6
0.55
6.8
3
25
0.55
10.2
0.55
0.35
16
5.5
25
0.8
20.3
1.2
1.0
GCF1S
12
5
25
0.63
17.8
0.6
0.65
GCF2
17.5
6.5
25
0.8
22.9
1.2
1.2
GCF2S
16
5.5
25
0.8
20.3
1.2
1.0
GCF3S
17.5
6.5
25
0.8
22.9
1.2
1.2
L max
D max
f min
d ± 0.10
GCF1/8
3.5
1.85
25
0.5
GCF¼
6.8
2.5
25
GCF¼S
3.5
1.85
GCF½
10
GCF½S
GCF1
PCB mounting
centres
d
D
L
f
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: [email protected] Website: www.welwyn-tt.com
A subsidiary of
TT electronics plc
Issue D . 11.06
GCF Series
Construction
A carbon film is deposited onto a ceramic former. Plated steel caps are then fitted before the resistor is adjusted to value by a helical
cut in the film. Termination wires are then welded to the caps and the body of the resistor is protected with an epoxy coating.
Terminations
Material
Hot tin dipped copper wire.
Strength
The terminations meet the requirements of IEC 68.2.21
SolderabilityThe terminations meet the requirements of IEC 115-1,Clause 4.17.3.2
Marketing
Resistance value and tolerance are identified in accordance with IEC 62 4-band colour code.
Solvent Resistance
The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits.
Performance Data
Maximum Change
Load life
DR%
3
Load life in humidity
DR%
DR%
5
Temperature rapaid change
1 + 0.05W
Zero at 155°C
Derating from rated power at 70°C
Short term overload
1 + 0.05W
DR%
No evidence of mechanical damage
Terminal strength
Resistance to solder heat
DR%
1 + 0.05W
Solderability
Minimum of 95% coverage
Resistance to solder heat
Insulation resistance
Dielectric withstanding
No deterioration of protective coating and marking
min
1000M
No evidence of flahover, mechanical damage, arcing of insulation breakdown
© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: [email protected] Website: www.welwyn-tt.com
Issue A . 11.06
GCF Series
Packaging
All GCF resistors are supplied ammo tape packed ready for loading on to automatic sequencing and insertion machines.
Component wires will not protrude beyond the outside edge of the tapes.
Alternative packaging available by request
GCF
¼
¼S
½
½S
1
1S
2
2S
3S
W
52
52
52
52
52
52
52
67
67
67
B
5
5
5
5
5
10
5
10
10
10
B
Body location f1-f2 < 1.4mm
6
f1
f2
W
6
Application Notes
If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered closer than 4mm
from the body. Due to operating temperature limits imposed by some PCB materials, derating may be necessary.
GCF resistors can also be supplied with radial, goalpost or lancet pre-formed leads. Consult Factory for details.
Goalpost
Radial
Lanset
Ordering Procedure
Example: GCF1/4 small size at 10 kilohms and 5% tolerance and ammo packed in a box with a standard quantity of 5000pcs.
GCF1 / 4S – 10K J A5
Type
Value (use IEC62 code)
Tolerance (use IEC62 code)
J
5%
Packing
A5
A1
A05
Ammo
Pack
GCF1 8 , GCF1 4 , GCF1 4 S, GCF1 2 S,
5000 / Box
GCF1 2 ,
1000 / Box
GCF1, GCF1S, GCF2S
GCF2, GCF3S
© Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: [email protected] Website: www.welwyn-tt.com
500 / Box
Issue A . 11.06
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