RCH

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Vishay Sfernice

Revision: 06-Jul-15

2

Document Number: 50006

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT



STANDARD ELECTRICAL SPECIFICATIONS

MODEL

RESISTANCE

RANGE



RATED POWER

W

TOLERANCE

± %

TEMPERATURE

COEFFICIENT

± ppm/°C

SERIES

RCH 5

0.24 to 1M

5

1, 2, 5, 10

150, 250

E24 range

RCH 10

0.24 to 1M

10

1, 2, 5, 10

150, 250

E24 range

RCH 25

0.24 to 1M

25

1, 2, 5, 10

150, 250

E24 range

RCH 50

0.24 to 1M

50

1, 2, 5, 10

150, 250

E24 range

MECHANICAL SPECIFICATIONS

Mechanical Protection

Insulated case

Resistive Element

Cermet

Substrate

Alumina

Connections

Tinned copper alloy

ENVIRONMENTAL SPECIFICATIONS

Temperature Range

-55 °C to +125 °C

Climatic Category

55 / 125 / 56

Flammability

IEC 60695-11-5

2 applications 30 s

separated by 60 s

TECHNICAL SPECIFICATIONS

Dissipation and Associated

Onto a heatsink

Power Rating:



Chassis Mounted



Unmounted

5 W to 50 W

2 W to 5.5 W

Temperature Coefficient

± 150 ppm/°C

Insulation Resistance



Total Inductance

 0.1 μH

PERFORMANCE

TESTS

CONDITIONS

REQUIREMENTS

Momentary Overload

NF EN140000 CEI 115_1

2 Pr/5 s

< ± (0.25 % + 0.05

)

Rapid Temperature Change

NF EN140000 125 °C CEI 68215 Test Na

5 cycles

-55 °C to +125 °C

< ± (0.25 % + 0.05

)

Load Life

NF EN140000 CEI 115_1

1000 h Pr at +25 °C

< ± (0.5 % + 0.05

)

Humidity (Steady State)

56 days RH 95 %

MIL-STD-202 Method 103 B and C

< ± (0.5 % + 0.05

)

RESISTANCE VALUE IN RELATION TO TOLERANCE AND TCR

Resistance Values

< 1



> 1



Standard Tolerances

± 5 %

± 10 %

Standard TCR

± 250 ppm/°C

± 150 ppm/°C

Tolerance on Request

± 1 % to ± 2 %

SPECIAL FEATURES

MODEL

RCH 5

RCH 10

RCH 25

RCH 50

Power Rating-Chassis Mounted

5 W

10 W

25 W

50 W

Power Rating-Unmounted

2 W

2.5 W

4 W

5.5 W

4.8 °C/W

3.2 °C/W

1.4 °C/W

0.8 °C/W

160 V

250 V

550 V

1285 V

320 V

500 V

1100 V

2500 V

MIL-STD-202 Method 301 10 mA max.

2000 V

2000 V

3500 V

3500 V

Critical Resistance

5120



6250



12 100



33 024

