4805 [TTELEC]
Ultra Precision Bulk Metal Film Resistors; 超高精度Bulk金属膜电阻器
| 型号： | 4805 |
| 厂家： | 
TT Electronics |
| 描述： | Ultra Precision Bulk Metal Film Resistors |
| 文件： | 总2页 (文件大小：133K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ultra Precision Bulk
Metal Film Resistors
Welwyn Components
4800 Series
• BS/CECC approved
Tolerances down to 0.005%
Current noise and distortion below level
of practible measurement
•
•
Low thermal e.m.f
Ideal resistor for precision instrumentation
Use of bulk metal gives superior stability
Planar construction gives low residual
capacitance and inductance
•
•
•
•
Electrical Data
Commercial
4802/12/32
4804
4805
Notes
Power Rating at 20°C
Resistance Range
watts
0.5
1
1.5
ohms 1R0 to 100K 0R5 to 200K 33R0 to 300K
Limiting element voltage
TCR (20 to 70°C)
volts
200
5
350
5
500
5
ppm/°C
Resistance tolerance
See table 1 below
Approved BS CECC 40-302-002*
Power rating at 70°C
Resistance range
4802/12
0.25
watts
ohms
100 to 56K
200
Limiting element voltage
TCR (-55 to 125°C)
volts
ppm/°C
5
Resistance tolerance
Thermal impedance
Values
See table 1 below
°C/watt
°C
250
130
80
E24 and E96 preferred
-55 to 155
Any value to order
Ambient temperature range
All styles and products
* BS CECC 40 Style reference: 4802 BX; 4812 CX
Table 1. Resistance Range (ohms) and Tolerance (%)
Tolerance (code)
0.005 (E)
0.01 (L)
4802/12/32
200R to 100K
100R to 100K
50R to 100K
25R to 100K
10R to 100K
5R to 100K
4804
4805
100R to 200K
50R to 200K
25R to 200K
10R to 200K
5R to 200K
2R to 200K
10R to 200K
0.5R to 200K
65R to 300K
33R to 300K
17R to 300K
8R to 300K
0.02 (P)
0.05 (W)
0.1 (B)
3.3R to 300K
1.7R to 300K
0.6R to 300K
0.33R to 300K
0.25 (C)
0.5 (D)
2R to 100K
1.0 (F)
1R to 100K
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.
A subsidiary of
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
Issue B · 03.02
186
Ultra Precision Bulk Metal
Film Resistors
Welwyn Components
4800 series
Physical Data
Dimensions (mm) & Weight (g)
4802/12/04/05
L
W
Type
L max
H max
10.2
8
W max
3.8
T min
30
d nom
0.6
S nom Wt. nom
4802
4812
4804
4805
4832
8.9
5.1
5.1
1
H
T
7.5
2.5
30
0.6
0.6
1.5
2
d dia
15.2
22.6
9.7
13.2
13.2
5.4
3.8
30
0.6
10.2
17.8
1.5
S
4832
3.8
30
0.6
d
H
S
9.7
30
0.6
1.1
L
W
T
Terminations
Material
Strength
Construction
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.
The resistor element is an etched bulk metal foil, bonded to
an alumina substrate. Connections to the foil are made by
copper wires welded to the foil to minimise thermal e.m.f.
Before encapsulation, the resistor element is coated with
silicone rubber to isolate the element from mechanical stress
which would adversely affect the carefully balanced
construction and result in poor resistance/temperature
characteristics.
Solderability
Marking
Type reference, resistance value, tolerance and date code are
legend marked. The resistance value conforms to IEC 62.
Solvent Resistance
The protection will withstand all normal industrial solvents
suitable for cleaning printed circuit boards.
Performance Data
Actual
Maximum
0.05
Typical
0.02
Load at commercial rating: 1000 hours at 70°C
Dry heat: 1000 hours at 155°C
Shelf life: 12 months at room temperature
Derating from rated power at 70°C
Short term overload
∆R%
∆R%
∆R%
0.05
0.02
0.0025
Zero at 155°C
55/155/56
∆R%
0.01
0.005
Climatic category
Climatic
∆R%
∆R%
∆R%
∆R%
∆R%
µV/V
0.05
0.05
0.01
0.01
0.01
0.03
0.03
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
0.005
0.005
0.005
Noise. (in a decade of frequency)
Below level of
practicable measurement
>1000M
Voltage coefficient of resistance
Insulation Resistance
Inductance
ppm/V
ohms
µH
0.2
1
0.08
0.5
Capacitance
pF
Packaging
All components are supplied loose packed in either plastic bags
or panel boxes. Quantity per box will depend on resistor size.
© 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
Issue B · 03.02
187
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