概述
数据手册W21-R18JI 概述
RESISTOR 0R18 3W
电阻0R18 3W\n
W21-R18JI 数据手册
通过下载W21-R18JI数据手册来全面了解它。这个PDF文档包含了所有必要的细节，如产品概述、功能特性、引脚定义、引脚排列图等信息。
PDF下载Vitreous Enamelled
Wirewound Resistors
W20 SERIES
● All welded construction
● High purity ceramic substrate
● Impervious lead free vitreous enamel coating
● High power dissipation for size
● High stability and reliability
● Suitable for harsh environments
● Overload characteristics ideal
for protection circuits
Electrical Data
Commercial
W21
3.0
1 to 10k
0.5 to 10k
0.1 to 10k
W215
5.0
1 to 15k
W22
7.0
1 to 22k
0.5 to 22k
0.1 to 22k
W23
10.0
1 to 60k
W24
14.0
1 to 100k
1 to 100k
0.2 to 100k
Power rating at 25°C
Resistance range at
watts
ohms
ohms
ohms
pp/°C
1% tolerance
2% tolerance
5% tolerance
0.5 to 15k
0.1 to 15k
Typically: <+75
1 to 60k
0.15 to 60k
Maximum: +200
TCR (-55° to 200°C)
Approved BS CECC 40-201-002
Power rating at 25°C
Power rating at 70°C
Style
watts
watts
ohms
ohms
ohms
ppm/°C
JB
2.9
2.5
HB
5.0
4.3
KB
7.0
6.0
LB
10.0
9.0
MB
14.0
12.0
Resistance range at
1% tolerance
1 to 10k
0.5 to 10k
0.1 to 10k
1 to 15k
0.5 to 15k
0.1 to 15k
1 to 20k
0.5 to 20k
0.1 to 20k
1 to 56k
1 to 56k
0.15 to 56k
≥10 ohms: ±200
1 to 100k
1 to 100k
0.2 to 100k
2% tolerance
5% tolerance
TCR (-55° to 200°C)
≥5 ohms < 10 ohms: ±400
Applicable to commercial and approved ranges
Limiting element voltage
Standard values
Thermal impedance
volts
100
160
200
500
750
22
E24 preferred. Other values to special order
88
°C/watt
°C
58
44
29
Ambient temperature range
-55 to 200
Physical Data
Dimensions (mm) & weight (g)
Type
W21
W215
W22
W23
W24
L max
12.7
22.0
22.0
38.0
53.5
D max
5.6
7.0
8.0
8.0
f min
22.75
23.1
23.1
-
d nom
Wt.nom
0.8
0.8
0.8
0.8
0.8
1
2
2
3.5
5
d dia
D
L
f
8.0
-
CONSTRUCTION
400
300
200
100
A high purity ceramic substrate is assembled with interference fit end caps to which
are welded the termination wires. The resistive element is wound on the substrate
and welded to the caps; the vitreous enamel protective coating is then applied.
W215
W21
W23
W24
W22
TERMINATIONS
Material
Copper clad steel wire, nickel plated and solder-coated.
The terminations meet the requirements of IEC 68.2.21.
The terminations meet the requirements of IEC 115-1,–
Clause 4.17.3.2.
W23’s and W24’s are not supplied on tape.
Minimum lead length is 30 mm.
Strength
Solderability
Length
MARKING
The resistors are legend marked with type reference, resistance value and tolerance.
Values are marked in accordance with IEC 62.
0
0
5
10
15
20
Dissipation – Watts
SOLVENT RESISTANCE
The body protection and marking are resistant to all normal industrial cleaning
solvents suitable for printed circuits.
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.
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, England Tel: 01670 822181 Fax: 01670 829465 Web: http://www.Welwyn-TT.co.uk
Issue A 07/99
Vitreous Enamelled
Wirewound Resistors
W20 SERIES
Performance Data
CECC 40201-002
Requirements
ACTUAL PERFORMANCE
Maximum
Typical
3.5
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
Shelf life: 12 months at room temperature
Derating
∆R%
∆R%
∆R%
∆R%
5
5
5
3.5
5
2
1
not specified
0.03
0.02
see derating curve
Short term overload
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
∆R%
µv/v
1
1.0
0.5
0.2
0.2
Climatic
5
Climatic category
55/200/56
Long term damp heat
Temperature rapid change
Resistance to solder heat
Vibration and bump
5
0.05
0.5
0.02
0.2
1
1
0.25
0.03
1
0.25
0.05
Noise (in decade of frequency)
Robustness
not specified
1
zero
zero
∆R%
Ohms
volts
0.4
0.05
Insulation resistance
not specified
not specified
>.1G ohm
500 min
>.1G ohm
500 min
Voltage Proof
Pulse handling data
available by request
APPLICATION NOTES
116
100
Derating Curve
The termination should not be bent closer than
1.6mm from the body, and the recommended
minimum bend radius is 1.2mm. The terminations
are solderable to within 4mm from the body.
54
0
When cold, vitreous enamel has excellent insulation
resistance. In common with all insulants
25
70
200
315
the specific resistance of the enamel decreases with
increase in temperature. Therefore, resistors
Ambient temperature °C
operated at near maximum temperature cannot be
classed as insulated and should not be used in
contact with any conducting material. Care must be
taken when determining clearance distance between
the resistor body and the printed circuit board or
other components to ensure these are not over
heated. Resistance is measured 6mm from body.
PACKAGING
For W21 and W215 the standard method of
packaging is taped in Ammo Packs. For W22 the
standard method of packaging is taped and reeled.
10 ± 0.5
Alternatives available by special request are detailed
in the table below.
W23’s and W24’s are available only as loose packed
in boxes. W series resistors can bbe supplied
preformed. Contact factory for details.
f1
f2
A
6
6
f1 – f2 ≤ 1.4 mm
STANDARD QUANTITIES PER PACKAGE
Type
W21 W215 W22 W23 W24
Type
W21
W215
W22
A
Ammo Pack
Reel
1000 750
1000 750
500
700
N/A
N/A
N/A
50
N/A
N/A
25
63±2
73±2
73±2
Small Box
N/A
N/A
© Welwyn Components Limited
Bedlington, Northumberland NE22 7AA, England Tel: 01670 822181 Fax: 01670 829465 Web: http://www.Welwyn-TT.co.uk
Issue A 07/99
W21-R18JI 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| W21-R20JI | ETC | WIDERSTAND DRAHT EMAILL 0R20 100V 2.5W | 获取价格 |
|
| W21-R22JI | ETC | WIDERSTAND DRAHT EMAILL 0R22 100V 2.5W | 获取价格 |
|
| W21-R27JI | ETC | RESISTOR 0R27 3W | 获取价格 |
|
| W21-R33JI | ETC | WIDERSTAND DRAHT EMAILL 0R33 100V 2.5W | 获取价格 |
|
| W21-R39JI | ETC | RESISTOR 0R39 3W | 获取价格 |
|
| W21-R47JI | ETC | WIDERSTAND DRAHT EMAILL 0R47 100V 2.5W | 获取价格 |
|
| W21-R50JI | ETC | WIDERSTAND DRAHT EMAILL 0R5 100V 2.5W | 获取价格 |
|
| W21-R51JI | ETC | RESISTOR 0R51 3W | 获取价格 |
|
| W21-R56JI | ETC | RESISTOR 0R56 3W | 获取价格 |
|
| W21-R68JI | ETC | WIDERSTAND DRAHT EMAILL 0R68 100V 2.5W | 获取价格 |
|
W21-R18JI 相关文章
Bourns 密封通孔金属陶瓷微调电位计产品选型手册(英文版)
- 2024-09-20
- 6
Bourns 精密环境传感器产品选型手册(英文版)
- 2024-09-20
- 9
Bourns POWrTher 负温度系数(NTC)热敏电阻手册 (英文版)
- 2024-09-20
- 8
Bourns GMOV 混合过压保护组件产品选型手册(英文版)
- 2024-09-20
- 6
