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參數(shù)資料
| 型號： | CAR |
| 廠商： | TT Electronics / Welwyn |
| 英文描述： | Ultra Precision Metal Film Resistors |
| 中文描述： | 超精密金屬膜電阻 |
| 文件頁數(shù)： | 2/2頁 |
| 文件大?。?/td> | 95K |
| 代理商： | CAR |
Figure 1
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.
Terminations
Material
Strength
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
Solderability
Ultra Precision
Metal Film Resistors
CAR series
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
179
Issue B · 03.02
Welwyn Components
Values 10
≤
250k
Actual Performance
Values > 250k
Actual Performance
Maximum
Typical
Maximum
Typical
Load at rated power : 1000 hrs at 70°C (or 85°C)
R %
R %
R %
0.05
0.02
0.25
0.05
Dry heat : 1000 hrs at 155°C
0.15
0.08
1
0.2
Shelf life : 12 months at room temperature
0.01
0.003
0.04
0.02
Derating from rated power at 70°C (or 85°C)
Zero at 155°C
Zero at 155°C
Short term overload
R %
R %
0.01
0.001
0.08
0.01
Climatic
0.05
0.02
0.2
0.05
Climatic category
55/155/56
55/155/56
Long term damp heat
R %
R %
R %
R %
μV/V
0.05
0.02
0.2
0.05
Temperature rapid change
0.04
0.02
0.25
0.05
Resistance to solder heat
0.02
0.003
0.05
0.005
Vibration and bump
0.02
0.002
0.06
0.02
Noise (in a decade of frequency)
0.2
0.03
1
0.1
Voltage coefficient of resistance
ppm/V
0.3
<0.05
0.2
<0.05
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.
Performance Data
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.
52
f
1
f
2
6
6
Body location f
1
– f
2
≤
1.4 mm
5
Packaging
CAR5 and CAR6 resistors are supplied taped (on reel or in
ammo pack) or loose packed.
CAR7 resistors are supplied loose packed.
Type
CAR5
CAR6
CAR7
Small box
250
125
25
Large box
1000
500
250
Reel
5000
2500
-
Ammo Pack
1000
1000
-
Standard Quantities Per Pack
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