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MAR42

更新时间: 2024-09-23 03:50:23
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2页 124K
描述
Ultra Precision Metal Film Resistors

MAR42 数据手册

 浏览型号MAR42的Datasheet PDF文件第2页 
Ultra Precision  
Metal Film Resistors  
Welwyn Components  
MAR 40/42 series  
Tolerance down to 0.005%  
Very low TCRs  
Rugged moulded protection  
Matched sets available  
Electrical Data  
Notes  
Power rating at 85°C  
Resistance range  
watts  
ohms  
volts  
0.3  
20R0 to 400K  
Higher values by agreement  
Limiting element voltage  
TCR (0°C to +60°C)  
TCR (-55°C to +125°C)  
Resistance tolerance  
Standard values  
250  
2 (T18) & 5 (T16)  
ppm/°C  
ppm/°C  
%
5 (T18) & 10 (T16)  
0.005, 0.01, 0.02, 0.05, 0.1, 0.25, 0.5 & 1  
E24, E96 preferred  
80  
Any value to order  
Thermal impedance  
Ambient temperature range  
°C/watt  
°C  
- 55 to +155  
Physical Data  
Dimensions (mm) and Weight (g)  
L
W
Wt.  
H
Type  
L max.  
7.75  
H max. W max.  
T min.  
d nom.  
0.6  
S nom.  
3.8  
nom.  
0.65  
0.65  
d
T
MAR 40  
MAR 42  
8.64  
8.64  
3.3  
3.3  
25.4  
25.4  
8.25  
0.6  
5.1  
S
Marking  
Construction  
Type reference, TCR code, resistance value and tolerance. The  
Ceramic rods are coated with a metal film and plated steel  
resistance value marking conforms to IEC 62.  
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 multiple lacquer coat and  
encapsulated in an epoxy moulded protection.  
Solvent Resistance  
The body protection and marking are resistant to all normal  
industrial cleaning fluids suitable for printed circuits.  
Terminations  
Material  
Solder-coated copper wire.  
Strength  
The terminations meet requirements of  
IEC 68.2.21 and MIL-STD 1276.  
Solderability  
The terminations meet the requirements of  
IEC 115-1, Clause 4.17.3.2 and MIL-STD 202.  
General Note  
Welwyn Components reserves the right to make changes in product specification without notice or liability.  
All information is subject to Welwyns 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  
180  

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