Ultra Precision
Resistors
Ultra Precision Resistors
Metal Film
Metal Film Resistors
Ultra Precision
Welwyn Components
Welwyn Components
Metal Film
down to 0.01%
•
Tolerance
Resistors
CAR series
CAR series
•
Low TCR’s
CAR series
•
Tolerance down to 0.01%
•
High reliability
Low TCR’s
•
Tolerance down to 0.01%
•
Superior moisture performance
High reliability
•
Low TCR’s
Non standard values available
•
Superior moisture performance
•
High reliability
•
Highest stability metal film available
Superior moisture performance
•
Non standard values available
•
Matched sets and
Non standard values available
networks
•
Highest stability metal film available
Highest stability metal film available
Matched sets and networks
•
Matched sets and networks
Electrical Data
Power rating at 85°C
All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2)
Electrical Data
70°C
Power rating at
Resistance
Power rating at 70°C range
Limiting
Power rating at 85°C element voltage
TCR
Resistance range (20 to +70°C)
Resistance
Limiting element voltagetolerance
Standard values
TCR (20 to +70°C)
Thermal
Resistance tolerance impedance
Ambient temperature range
Standard values
Thermal impedance
°C/watt
Ambient temperature range
watts
watts
ohms
volts
ppm/°C
%
CAR5
watts
watts
CAR5
ohms
0.25
volts
0.125
ppm/°C
10R0 to 3M
250%
0.25
0.125
CAR6
10R0 0.33
to 3M
250
0.25
CAR6
0.33
0.25
CAR7
10R0 to 5M
0.5
350
0.33
CAR7
0.5
0.33
Notes
10R0 to 10M
500
Notes
5, 10R0 to 10M
10R0 to 5M 10, 15, 25, 50
0.01,
0.1,
350 0.02, 0.05, 5000.25, 0.5 & 1
E24,
5, 10, 15, 25, 50 E96 preferred
See tolerance/TCR
combinations
See tolerance/TCR below
60
combinations
below
°C/watt 0.02, 0.05, 0.1, 0.25, 0.5 &70
110
0.01,
1
°C E24, E96 preferred to +155
-55
110
70
-55 to +155
Tolerance
CAR6
0.05%
10 to 500k
10
0.1-1%
to 1M
10 to 1M
10 to 500k
10 to 1M
10 to 1M
10 to 1M
10 to 1M
0.1-1%
10 to 500k
10 to 1M
50 to 750k
10 to 3M
50 to 750k
10 to 5M
50 to 750k
60
°C
Table of Resistance Restrictions
Table of Resistance
CAR5
Restrictions
TCR
ppm/°C 0.01-0.02%
TCR
5
1
10
15
25
50
5
1
CAR7
0.01-0.02%
50 to 750k
CAR7
50 to 750k
10 to 750k
5010 to 1M
to 750k
5010 to 1M
to 750k
0.05%
10 to 750k
10
0.1-1%
to 1M
10 to 1M
10 to 1.5M
10 to 1M
10 to 3.5M
0.1-1%
10 to 750k
10 to 1.5M
10 to 5M
10 to 10M
0.05%
10 to 500k
10
0.1-1%
to 1M
10 to 1M
10 to 500k
10 to 1M
10 to 1M
10 to 1M
10 to 1M
10 to 1.5M
0.1-1%
10 to 500k
10 to 1M
50 to 500k
10 to 1.5M
50 to 500k
10 to 3M
50 to 500k
50 to 500k
50 to 500k
0.01/0.02%
Tolerance
50 to 500k
CAR6
50 to 500k
10 to 500k
5010 to 1M
to 500k
5010 to 1M
to 500k
10 to 1M
10 to 1M
50 to 300k
CAR5
50 to 300k
10 to 500k
5010 to 1M
to 300k
5010 to 1M
to 300k
10 to 1M
10
ppm/°C 0.01-0.02%
50 to 300k
0.05%
5015 300k
to
5025 300k
to
5050 300k
to
50 to 300k
50 to 300k
10 to 1M
0.01/0.02%
50 to 500k
0.05%
10 to 1M
0.01-0.02%
50 to 750k
0.05%
10 to 1M
10 to 750k 10 to 3.5M
10 1M
Physical
to
Data
10 to 3M
Dimensions (mm) and Weight (g)
10 to 3M
50 to on sampling.to 1M screened product is available.
10 100%
10 to 5M
Note1: Based 750k
10 to 5M
50 to 750k
10 to 1M
10 to 10M
Physical Data
Type
CAR5
Type
CAR5
CAR6
CAR7
CAR6
L Max
CAR7
7.2
10.0
15.5
Note1: Based on sampling. 100% screened product is available.
PCB
mounting
Min
Bend
Radius
0.6
Wt.
0.6
nom.
1.2
0.24
0.40
1.15
Wt.
nom.
0.24
0.40
1.15
Dimensions (mm) and Weight (g)
L Max
7.2
10.0
D Max
15.5
2.5
3.7
5.5
D Max
2.5
3.7
f min
5.5
30
30
30
f min
30
d nom.
0.630
0.6
0.8
d nom.
PCB
0.6
centres
0.8
10.2
12.7
18.4
30 mounting
0.6
centres
Min
10.2
Bend
12.7
Radius
18.4
0.6
0.6
1.2
d
D
L
f
f
d
D
L
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.
General Note
General Note
© Welwyn Components Limited
· Bedlington, Northumberland NE22 7AA, UK
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.
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
All information is subject to Welwyn’s own
data and is
considered accurate at time
going to
to print.
All information is subject to TT Electronics’ own
data and is
considered accurate at time of
of going
print.
BI Technologies IRC Welwyn
A subsidiary of
TT electronics plc
www.ttelectronics.com/resistors
A subsidiary of
TT electronics plc
178
© 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
05.18
Ultra Precision
Ultra Precision
Metal Film Resistors
Metal Film Resistors
Ultra Precision
Metal Film Resistors
Construction
Ceramic rods
CAR series
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
Construction
protected with a specially formulated epoxy coating.
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
Terminations
its final value.
Material
Solderable finish copper wire.
Termination wires are welded to the caps and the resistor is
Strength
The terminations meet the requirements of
protected with a specially formulated epoxy coating.
IEC 68.2.21
Solderability
The terminations meet the requirements of
Terminations
IEC 115-1, Clause 4.17.3.2
Material
Solderable finish copper wire.
Strength
The terminations meet the requirements of
IEC 68.2.21
Solderability
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2
CAR
series
CAR
series
Welwyn Components
Marking
Type reference, TCR code,
Welwyn Components
resistance value and tolerance
code.
The resistance value marking conforms to IEC 62.
Marking
Solvent Resistance
Type reference, TCR code, resistance value and tolerance
The body protection and marking are resistant to all normal
code.
industrial cleaning fluids suitable for printed circuits.
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.
Performance Data
Values 10
≤
250k
Actual Performance
Maximum
Typical
0.02
Values > 250k
Actual Performance
Maximum
0.25
Values > 250k
0.5
Typical
0.05
0.1
Performance Data
Load at rated power : 1000 hrs at 70°C (or 85°C)
Load at rated power : 8000 hrs at 70°C (or 85°C)
Dry heat : 1000 hrs at 155°C
Shelf life : 12 months at room temperature
∆R
%
∆
R %
0.05
Values 10
≤
250k
0.04
0.1
D at rated om ra : 1000 hrs t 0°C (or 5°C)
Loaderating frpowerted power aat770°C(or 885°C)
Short term overload
Load at rated power : 8000 hrs at 70°C (or 85°C)
DryClimatic
heat : 1000 hrs at 155°C
Shelflilife t:ic camonths at room temperature
C ma 12 tegory
DerLong term damp power at 70°C (or 85°C)
ating from rated heat
Short term overload change
Temperature rapid
Climatic
Resistance to solder heat
Climatic category bump
Vibration and
Longoise (in a decade of frequency)
N term damp heat
Temperature oefficient of resistance
Voltage c rapid change
Resistance to solder heat
Vibration and bump
∆
R %
0.15
0.08
Actual Performance
∆R
%
Maximum
0.01
0.003
Typical
∆R
%
0.05 Zero at 155°C
0.02
∆
R
∆R
%
%
∆
R
∆R
%
%
∆R
%
∆R
%
∆R ∆R
%
%
∆R ∆R
%
%
∆R
%
∆R
%V/V
µ
∆R
p% /V
pm
∆R
%
∆R
%
µV/V
0.01
0.1
0.05
0.15
0.01
0.01
0.04
0.05
0.02
55
0.02 /155/56
0.05 .2
0
0.04 .3
0
0.02
0.001
0.04
0.02
0.08
0.003
55/155/56
0.02
0.001
0.02
0.02
0.003
0.002
0.02.03
0
0.02 .05
<0
0.003
0.03
1
0.2
Actual Performance
0.04
0.02
Maximum
Typical
0.25 Zero at 155°C
0.05
0.08
0.01
0.5
0.1
0.05
1 0.2
0.2
0.04
0.08
0.25
0.2
0.05
55
0.06 /155/56
0.2 1
0.25 .2
0
0.05
1
55/155/50.02
6
0.05
0.01
0.05
0.05
0.005
0.02
0.05 .1
0
0.05 .05
<0
0.005
0.02
0.1
Zero at 155°C
0.2
Zero
0.05 at 155°C
Application Notes
Resistors can be supplied matched for tolerance and TCR
Voltage coefficient of resistance
ppm/V
0.3
down to ±0.005% and ±1ppm/°C, respectively, either as
separate resistors or pre-assembled and encapsulated within a
Figure 1
plastic box.
Noise (in a decade of frequency)
Application Notes
Figure 1
0.02
0.2
0.002
Packaging
0.06
CAR5 and CAR6 standard packing is in tape, as
5
<0
<0.05
shown
.05
below, whilst
0.2
CAR7 is bulk packed.
Resistors can be supplied matched for tolerance and TCR
The individual resistors within a set or module can be
down to ±0.005% and ±1ppm/°C, respectively, either as
manufactured with a tolerance of ±0.01% and a TCR of
separate resistors or pre-assembled and encapsulated within a
±5ppm/°C.
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.
f
1
6
52
1
f
2
– f
2
≤
1.4 mm
f
2
52
1
5
6
Body location f
f
1
6
Body location f
6
– 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.
© 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
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
05.18
179
Ultra Precision
Metal Film Resistors
CAR series
Ordering Procedure
This product has two valid part numbers:
European (Welwyn) Part Number: CAR5V-31K6PI
(CAR5 with TCR ±5ppm/°C at 31.6 kilohms ±0.02%, Pb-free)
C
A
1
1
CAR5
CAR6
CAR7
2
V = ±5
T = ±10
Y = ±15
D = ±25
C = ±50
R
5
V
2
3
Value
E24 = 3/4 characters
E96 = 4/5 characters
R = ohms
K = kilohms
M = megohms
-
3
1
3
K
6
P
4
I
5
4
Tolerance
L = ±0.01%
P = ±0.02%
W = ±0.05%
B = ±0.1%
C = ±0.25%
D = ±0.5%
F = ±1%
5
Finish, Screening & Packing
I = Standard packing & Pb-free
SC = Standard packing & Pb-free
with 5ppm/°C screened
PB = Standard packing & SnPb
CAR5
Ammo
Up to 5000/box
CAR6
Ammo
Up to 2500/box
CAR7
Bulk
250/box
Type TCR (ppm/°C)
USA (IRC) Part Number: CAR5LFV3162PA
(CAR5 with TCR ±5ppm/°C at 31.6 kilohms ±0.02%, Pb-free)
C
A
1
1
Type
2
Termination
R
5
L
2
F
V
3
3
TCR (ppm/°C)
V = ±5
T = ±10
Y = ±15
D = ±25
C = ±50
3
1
4
4
Value
6
2
P
5
A
6
5
Tolerance
A
B
CAR5
CAR6
CAR7
6
Packing
Ammo up to 5000/box
Ammo up to 2500/box
Bulk 250/box
CAR5 Omit for SnPb
CAR6 LF = Pb-free
CAR7
3 digits + multiplier L = ±0.01%
P = ±0.02%
R = ohms for
values <100 ohms W = ±0.05%
B = ±0.1%
C = ±0.25%
D = ±0.5%
F = ±1%
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
05.18
PCB设计
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
