WH10 [TTELEC]
Aluminium Housed Wirewound Resistors; 铝封装线绕电阻器
| 型号： | WH10 |
| 厂家： | 
TT Electronics |
| 描述： | Aluminium Housed Wirewound Resistors |
| 文件： | 总3页 (文件大小：72K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Aluminium Housed
Welwyn Components
Wirewound Resistors
WH Series
• High pow er dissipation for size
All w elded construction
•
Suitable for severe environments
•
Designed for excellent thermal
conductivity to heatsink
•
Electrical Data
WH5
10
WH10
15
WH25
WH50
Notes
Power rating at 25°C
Resistance range
watts
ohms
ppm/°C
%
25
50*
Mounted on standard heatsink
0R01 to 10K
0R01 to 20K
0R01 to 44K 0R015 to 120K
TCR (-55° to 200°C)
Resistance tolerance
Low value limits
<10Ω : ±75
≥ to <100 : ±50
1, 2, 5, 10
≥100Ω : ±25
ohms
1 at 1%
0.5 at 2%
0.05 at 5%
0.01 at 10%
WH50 0.015 at 10%
Approved CECC 40203 - 006
Power rating at 25°C
Resistance range
AA
BA
15
CA
DA
watts
ohms
10
25
40
Mounted on standard heatsink
0.05 to 3.4k
0.05 to 15k
0.05 to 33k
0.05 to 82k
TCR (-55° to 200°C)
Resistance tolerance
Low value limits
ppm/°C
%
≥5Ω ≤ 10Ω ± 100
>10Ω ± 50
1, 2, 5
ohms
1 at 1%
250
0.5 at 2%
0.05 at 5%
500
WH50 0.015 at 10%
Limiting element voltage
Standard values
volts
150
1250
3.5
E24 preferred range
10.0 6.0
Other values to special order
Mounted on standard heatsink
Thermal impedance
°C/watt
°C
16.0
Ambient temperature range
-55 to 200
*For load at maximum rating mount on heatsink 30.5 cm x 30.5 cm x 1.5 mm
Construction
Marking
Cap and lead assemblies are fitted to a high purity ceramic
substrate. The resistive element is wound onto the substrate
and welded to the caps. The wound rod is then moulded and
fitted into an aluminium housing to give optimum stability
and reliability.
The resistors are legend marked with type reference,
resistance value and tolerance which will withstand all
accepted industrial cleaning fluids. Values are marked in
accordance with IEC 62.
Terminations
Material
Strength
Solder dipped, copper clad steel wire.
The terminations meet the requirements of
IEC 68.2.21
Solderability
General Note
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2
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
© Welw yn 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 D · 03.06
107
Aluminium Housed
Wirewound Resistors
WH Series
Welwyn Components
Physical Data
Dimensions (mm)
Type
A
Max
30.0
36.5
51.0
72.5
G
B
±0.3
12.4
15.9
19.8
21.4
H
C
E
Min
1.9
1.9
2.8
2.8
M
F
Max
17
±0.3
11.3
14.3
18.3
39.7
L
WH5
WH10
WH25
WH50
Type
21
28
30
N
Max
9
Dia ±0.2
2.4
Max
17.0
21.0
29.0
51.0
±0.5
4.3
5.2
7.2
7.9
Max
1.8
2.2
2.6
2.6
WH5
WH10
WH25
WH50
11
2.4
15
3.3
16
3.3
Performance Data
CECC
40203-006
1.0
Actual
Notes
Maximum
Typical
0.4
Load at commercial rating: 1000 hrs at 25°C
Load at CECC rating: 1000 hours at 25°C
Dry heat: 1000 hours at 200°C
Derating from 25°C
∆R %
1.0
1.0
1.0
∆R %
∆R %
1.0
0.4
1.0
0.4
Zero at 200°C
1.0
Short term overload
∆R %
∆R %
1.0
1.0
0.2
0.4
Climatic sequence
1.0
Climatic category
55/200/56
1.0
Long term damp heat
∆R %
∆R %
0.5
0.25
0.2
0.1
Temperature rapid change
Resistance to solder heat
Vibration and bump
0.25
∆R %
0.25
0.25
0.05
0-.025
zero
∆R %
0.25
0.25
Noise (in decade of frequency)
Insulation resistance.
µV/V
Not specified
>1Gohm
1000 min
2000 min
zero
ohms
>20Tohm
1500 min
3000 min
>100Gohm
Isolation voltage : WH5 and 10
: WH25 and 50
volts AC peak
volts AC peak
See application
notes
Pulse handling
Data available by request
© Welw yn 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 D · 03.06
108
Aluminium Housed
Wirewound Resistors
WH Series
Welwyn Components
Application Notes
Reference aluminium heatsink dimension
Graph 1
CECC 40 STYLE
CECC 40203-006
L
W
H
Reference
50
40
30
20
10
cm
cm
cm
area sq. cm
AA (WH5)
BA (WH10)
CA (WH25)
DA (WH50)
15.5
18
10
13
5
5
410
544
DA
544cm2
CA
Aluminium thickness 1mm
BA
AA
Reference chassis
410cm2
5
10
50 100
500 1000
Heatsink Surface Area (cm2)
H
L
W
WH50 only
To load at maximum commercial rating (50W) mount on
heatsink 30.5cm x 30.5cm x 1.5mm.
Derating must be applied when resistors are mounted on a
heat sink of smaller dimensions than defined in Graph 1.
It is recommended that the resistor base should be coated
with heatsink compound before mounting to obtain the
stated operating characteristics.
The heatsink compound increases thermal conductivity to the
heatsink.
After soldering care should be taken to ensure that there are
no flux residues on the moulding compound, otherwise
insulation resistance will be reduced.
Packaging
Resistors are packed in plastic bags and boxed for maximum
protection.
© Welw yn 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 D · 03.06
109
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