Ultra Precision
Ultra
Precision
Precision
Metal Film Resistors
Metal
Film Resistors
Metal
Film Resistors
CAR
CAR series
series
CAR series
Tolerance down
Tolerance down to 0.01%
to 0.01%
Tolerance down to 0.01%
Low
Low TCR’s
TCR’s
Low TCR’s
High
High reliability
reliability
High Superior moisture performance
reliability
Superior moisture performance
Non standard values available
Superior moisture performance
Non standard values available
Highest stability metal film available
Non standard values available available
Highest stability metal film
Matched sets and networks
Highest stability metal networks
Matched sets and film available
Matched sets and networks
Welwyn Components
Welwyn Components
·
·
·
·
·
·
·
Electrical Data
Electrical Data
Power rating at 70°C
Power rating
Power rating at 70°Cat 85°C
Resistance range
Power rating at 85°C
Limiting element voltage
Resistance range
TCR (20 to +70°C)
Limiting element voltage
Resistance
TCR (20 to +70°C)tolerance
Standard values
Resistance tolerance
Thermal
Standard values impedance
Ambient temperature range
Thermal impedance
Ambient temperature range
CAR5
watts
CAR5
0.25
watts watts0.25 0.125
ohms
ppm/°C
%
°C/watt
°C
0.33
CAR6
CAR6
0.33
0.25
CAR7
0.5
CAR7
0.5
0.33
Notes
Notes
watts ohms 10R0 to 3M 10R0 to 5M 10R0 to 10M
0.125
0.25
0.33
volts to 3M 10R0 to 5M 10R0 to 10M
250
350
500
10R0
5(V), 10(T), 15(Y), 25(D), 50(C)
350
500
See tolerance/TCR
below
combinations
below
% 5(V), 10(T), 15(Y), 25(D), 50(C) 0.5(D) & See tolerance/TCR
0.01(L), 0.02(P), 0.05(W), 0.1(B), 0.25(C),
1(F)
combinations
0.01(L), 0.02(P), 0.05(W),E24, E96 preferred & 1(F)
0.1(B), 0.25(C), 0.5(D)
110 E96 preferred
70
E24,
70-55 to +155 60
-55 to +155
60
°C110
voltsppm/°C250
°C/watt
Table of Resistance Restrictions
Table of Resistance Restrictions
TCR
TCR
5
1
10
15
25
50
CAR5
0.1-1%
ppm/°C 0.01-0.02%
CAR5 0.05%
Tolerance
CAR7
0.1-1%
0.01-0.02%
CAR7 0.05%
0.1-1%
CAR6
Tolerance
0.01/0.02%
CAR6 0.05%
5
1
50 to
10
10
50 to
10
10
50 to
10
10
ppm/°C 0.01-0.02%
300k
0.05%
to 500k
0.1-1%
to 500k
0.01/0.02%
500k
0.05%
to 500k
0.1-1%
to 500k
0.01-0.02%
750k
0.05%
to 750k
0.1-1%
to 750k
10 50 to 300k 300kto 500k to 1M to 500k to 1M to 500k 500kto 500k to 1M to 500k to 1M to 750k 750kto 750k to 1M to 750k 1.5M
50 to 10
10
10
50 to 10
10
10
50 to 10
10
10 to
10
50
10
50
10
15 50 to 300k 300k to 1M to 1M to 1M to 1M to 500k 500k to 1M to 1M to 1M to 1M to 750k 750k to 1M to 1M to 1.5M 3.5M
50 to 10
10
10
50 to 10
10
10
50 to 10
10
10 to
10
50
10
50
10
25 50 to 300k 300k to 1M to 1M to 1M to 1.5Mto 500k 500k to 1M to 1M to 1M to 3M to 750k 750k to 1M to 1M to 3.5M to 5M
50 to 10
10
10
50 to 10
10
10
50 to 10
10
10
10
50
10
50
10
50 50 to 300k 300k to 1M to 1M to 1.5M to 3M to 500k 500k to 1M to 1M to 3M to 5M to 750k 750k to 1M to 1M to 5M to 10M
50 to 10
10
10
50 to 10
10
10
50 to 10
10
10
10
50
10
50
10
50 to 300k
10 to 1M
10 to 3M
50 to 500k
10 to 1M
10 to 5M
Note1: Based 50 to 750k 100% screened 10 to 10Mavailable.
on sampling. 10 to 1M
product is
Physical Data
Physical Data
Weight (g)
Dimensions (mm) and
Dimensions (mm) and Weight (g)
Type
Type
CAR5
Max
L
CAR5 CAR6
7.2
CAR6 CAR7
10.0
CAR7
15.5
L Max
7.2 Max
D
10.0
2.5
15.5
3.7
5.5
D Max
2.5f min
3.7 30
5.5 30
30
Note1: Based on sampling. 100% screened product is available.
PCB
PCB mounting
Min
f min
30 0.6
30 0.6
0.8
30 nom. 0.6
d
centres 10.2
Radius
0.6
10.2
0.8
12.7
18.4
12.70.6
18.40.6
1.2
Min
Bend
0.6
nom.
0.60.24
1.20.40
1.15
Wt.
nom.
0.24
0.40
1.15
d mounting Bend Radius
nom. centres
Wt.
d
d
D
D
L
L
f
f
General Note
General Note
General Note
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
Welwyn Components reserves the right to make changes in product specification without notice or liability.
A subsidiary of
Welwyn Components reserves
to
right to make changes in product specification without notice
TT electronics plc
TT electronics reserves the right
the
make changes in product specification without notice or liability.
or liability.
A subsidiary of
All information is subject
to TT electronics’
Limited
· Bedlington, Northumberland NE22
going
print.
© Welwyn
to Welwyn’s own data and is considered accurate at
at time of
7AA,
to
All information is subject
Components
own data and is considered accurate
time of going to UK
print.
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
TT electronics plc
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
© TT electronics plc
822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Telephone: +44 (0) 1670
178
10. 11
178
Ultra Precision
Ultra Precision
Metal Film Resistors
Metal Film Resistors
CAR
series
CAR
series
Construction
Ceramic rods are coated with a metal film and plated steel
caps are force fitted. A helical cut is used to adjust the film to
its final value.
Termination wires are welded to the caps and the resistor is
protected with a specially formulated epoxy coating.
Welwyn Components
Marking
Type reference, TCR code, resistance value and tolerance
code.
The resistance value marking conforms to IEC 62.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning fluids suitable for printed circuits.
Terminations
Material
Strength
Solderability
Solder-coated copper wire.
The terminations meet the requirements of
IEC 68.2.21
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2
Performance Data
Values 10
≤
250k
Actual Performance
Maximum
Load at rated power : 1000 hrs at 70°C (or 85°C)
Dry heat : 1000 hrs at 155°C
Shelf life : 12 months at room temperature
Derating from rated power at 70°C (or 85°C)
Short term overload
Climatic
Climatic category
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
Noise (in a decade of frequency)
Voltage coefficient of resistance
∆R
%
∆R
%
∆R
%
∆R
%
µV/V
ppm/V
0.05
0.04
0.02
0.02
0.2
0.3
∆R
%
∆R
%
∆R
%
∆R
%
∆R
%
0.05
0.15
0.01
0.01
0.05
55/155/56
0.02
0.02
0.003
0.002
0.03
<0.05
0.2
0.25
0.05
0.06
1
0.2
Typical
0.02
0.08
0.003
0.001
0.02
Values > 250k
Actual Performance
Maximum
0.25
1
0.04
0.08
0.2
55/155/56
0.05
0.05
0.005
0.02
0.1
<0.05
Zero at 155°C
0.01
0.05
Typical
0.05
0.2
0.02
Zero at 155°C
Application Notes
Resistors can be supplied matched for tolerance and TCR
down to ±0.005% and ±1ppm/°C, respectively, either as
separate resistors or pre-assembled and encapsulated within a
plastic box.
The individual resistors within a set or module can be
manufactured with a tolerance of ±0.01% and a TCR of
±5ppm/°C.
Figure 1
5
f
1
6
52
f
2
6
Body location f
1
– f
2
≤
1.4 mm
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
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© TT electronics plc
10. 11
179
Ultra Precision
Metal Film Resistors
Metal Film Resistors
CAR series
CAR series
Ultra Precision
Welwyn Components
Ordering Procedure
Example: CAR5 with TCR of 5ppm/ °C at 31.6 kilohms and 0.02% tolerance in an ammo pack
box of 1000 pieces -
CAR5V–31K6P
I
Type
V
T
Y
TCR
5 ppm/
°C
10 ppm/
°C
15 ppm/
°C
D
C
25 ppm/
°C
50 ppm/
°C
Value (use IEC62 code)
Tolerance (use IEC62 code)
L
P
W
B
0.01%
0.02%
0.05%
0.1%
C
D
F
0.25%
0.5%
1%
Packing
I
Ammo
Bulk
CAR5, CAR6
CAR7
1000/box
250/box
Standard
For 5ppm/°C screened product, replace the packing suffix with
SC.
Example:
CAR5V-31K6PSC
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
UK
going to print.
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA,
of
www.bitechnologies.com www.irctt.com www.welwyn-tt.com
11.09
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
© TT electronics plc
10. 11
179
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