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RCH
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STANDARD ELECTRICAL SPECIFICATIONS
Vishay Sfernice
MODEL
RCH 5
RCH 10
RCH 25
RCH 50
RESISTANCE
RANGE
?
0.24 to 1M
0.24 to 1M
0.24 to 1M
0.24 to 1M
RATED POWER
P 25 °C
W
5
10
25
50
TOLERANCE
±%
1, 2, 5, 10
1, 2, 5, 10
1, 2, 5, 10
1, 2, 5, 10
TEMPERATURE
COEFFICIENT
± ppm/°C
150, 250
150, 250
150, 250
150, 250
SERIES
E24 range
E24 range
E24 range
E24 range
MECHANICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS
Mechanical Protection
Resistive Element
Substrate
Connections
Insulated case
Cermet
Alumina
Tinned copper alloy
Dissipation and Associated
Power Rating: ?
Chassis Mounted ?
Unmounted
Temperature Coefficient
Onto a heatsink
5 W to 50 W
2 W to 5.5 W
± 150 ppm/°C
ENVIRONMENTAL SPECIFICATIONS
Temperature Range - 55 °C to + 125 °C
Climatic Category 55/125/56
?
Insulation Resistance
Total Inductance
10 6 M ?
? 0.1 μH
IEC 60695-11-5
Flammability
2 applications 30 s
separated by 60 s
PERFORMANCE
TESTS
Momentary Overload
Rapid Temperature Change
Load Life
Humidity (Steady State)
CONDITIONS
NF EN140000 CEI 115_1
2 Pr/5 s
U S < 1.5 U L
NF EN140000 125 °C CEI 68215 Test Na
5 cycles
- 55 °C to + 125 °C
NF EN140000 CEI 115_1
1000 h Pr at + 25 °C
56 days RH 95 %
MIL-STD-202 Method 103 B and C
REQUIREMENTS
< ± (0.25 % + 0.05 ? )
< ± (0.25 % + 0.05 ? )
< ± (0.5 % + 0.05 ? )
< ± (0.5 % + 0.05 ? )
RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR
Resistance Values
Standard Tolerances
Standard TCR
Tolerance on Request
SPECIAL FEATURES
<1 ?
± 250 ppm/°C
±5%
± 10 %
± 1 % to ± 2 %
>1 ?
± 150 ppm/°C
MODEL
Power Rating-Chassis Mounted
Power Rating-Unmounted
Thermal Resistance R th (j - c)
Limiting Element Voltage (V RMS )
Max. Overload Voltage (V RMS )
Dielectric Strength (V RMS ) 50 Hz, 1 min
MIL-STD-202 Method 301 10 mA max.
Critical Resistance
Revision: 01-Aug-13
RCH 5
5W
2W
4.8 °C/W
160 V
320 V
2000 V
5120 ?
2
RCH 10
10 W
2.5 W
3.2 °C/W
250 V
500 V
2000 V
6250 ?
RCH 25
25 W
4W
1.4 °C/W
550 V
1100 V
3500 V
12 100 ?
RCH 50
50 W
5.5 W
0.8 °C/W
1285 V
2500 V
3500 V
33 024 ?
Document Number: 50006
For technical questions, contact: sferfixedresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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