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2500 参数 Datasheet PDF下载

2500图片预览
型号: 2500
PDF下载: 下载PDF文件 查看货源
内容描述: 低值金属膜电阻器 [Low Value Metal Film Resistors]
分类和应用: 电阻器膜电阻器金属膜电阻器
文件页数/大小: 1 页 / 87 K
品牌: WELWYN [ WELWYN COMPONENTS LIMITED ]
   
Low Value
Metal Film Resistors
2500 Series
Welwyn Components
Resistance values down to 0.025 ohms
Low inductance
Tolerances down to 1%
Flameproof protection
Electrical Data
2504
Power rating at 25°C
Power rating at 70°C
Resistance range
Isolation voltage
TCR (+20° to 70°C)
Resistance tolerance
Thermal impedance
Values
Operating temperature range
°C
watts
watts
ohms
volts
ppm/°C
%
°C/watt
2.0
1.5
0R025 to 1
700
See Figure 1
1, 2, 5, 10
65
E24
-55 to +150
Measured at 6mm from caps
Notes
Physical Data
Dimensions (mm) & weight (g)
PCB
Type
2504
L Max
14.5
D Max
5.3
f min
23.8
d nom
0.8
mounting
centres
20.3
Min.
bend
radius
1.2
Wt.
nom
1.1
d
D
L
f
Construction
The metal film is deposited on a high purity ceramic rod. End
caps are force fitted and termination wires welded to the
caps. The resistive film is then adjusted to the required value;
finally the cement protection is applied to the resistor body
and marked with indelible ink.
Marking
Values below R10 are colour coded with 3 bands. Values R10
and above are marked with 4 bands. IEC 62 colours are used.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning fluids suitable for printed circuits.
Terminations
Material
Strength
Solder-coated copper wire.
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
Flammability
The resistors will not burn or emit incandescent particles
under any condition of applied temperature or power
overload.
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
Issue B · 03.02
© 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
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