RCMS02, RCMS05, RCMS1

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Vishay Sfernice

Revision: 27-Jul-2021

2

Document Number: 52007

For technical questions, contact: sferfixedresistors@vishay.com

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POWER RATING

TEMPERATURE RISE

PRACTICAL OPERATING TOLERANCES

Tables 2 and 3 show the basic characteristics and max.

values under different stresses. In fact, the values and drifts

are maintained to within narrower limits.

Thus, in operation under the specified conditions (

Pr at

70 °C) the total drift (load life + TCR) of a RCMS K3 does not

exceed ± 0.5 %.

NOISE LEVEL

In a frequency decade, the average noise level increases

with the ohmic value and can reach 0.3 μV/V for the highest

values. It is non measurable for

Rn < 2 kΩ.

MARKING

Printed: Vishay Sfernice trademark, series, ohmic value (in

Ω), tolerance (in %), temperature coefficient, manufacturing

data. Due to lack of space RCMS 02 is printed MS 02.

PERFORMANCE

TESTS

CONDITIONS

REQUIREMENTS

TYPICAL VALUES

AND DRIFTS

Load life at max. category temperature

1000 h at 125 °C 50 % of

Pn

≤ ± (1 % + 0.05 Ω)

Insulation resist. > 1 G

Ω

± 0.5 % or 0.05

Ω

Insulation resist. 106 M

Ω

Short time overload

2.5 Un / 5 s

Limited to 2 Um

≤ ± (0.25 % + 0.05 Ω)

± 0.1 % or 0.05

Ω

Damp heat humidity (steady state)

56 days

with low load

≤ ± (1 % + 0.05 Ω)

Insulation resist. > 1 G

Ω

± 0.5 % or 0.05

Ω

Insulation resist. 106 M

Ω

Rapid temperature change

-55 °C +125 °C

≤ ± (0.25 % + 0.05 Ω)

± 0.1 % or 0.05

Ω

Climatic sequence

-55 °C +125 °C

severity 1

≤ ± (0.5 % + 0.05 Ω)

Insulation resist. > 1 G

Ω

± 0.1 % or 0.05

Ω

Insulation resist. 106 M

Ω

Terminal strength

Pull - twist - 2 bends

≤ ± (1 % + 0.05 Ω)

± 0.05 % or 0.05

Ω

Vibration

10 Hz to 500 Hz

≤ ± (0.25 % + 0.05 Ω)

± 0.05 % or 0.05

Ω

Soldering (thermal shock)

+260 °C 10 s

≤ ± (0.25 % + 0.05 Ω)

± 0.1 % or 0.05

Ω

Load life

Cycle 90’/30’

1000 h at

Pn at 70 °C

≤ ± (1 % + 0.05 W)

Insulation resist. > 1 G

Ω

± 0.2 % or 0.05

Ω

Insulation resist. 106 M

Ω

Shelf life

1 year

ambient temperature

-

± 0.1 % or 0.05

Ω

AMBIENT TEMPERATURE IN (°C)

100

50

0

0

30

50

70

100

125

150

RATED POWER IN (W)

60

40

20

0

5

0

S

M

C

R

1

S

M

C

R

0

0.25

0.5

0.75

1

Temperature coefficient

between -10 °C and +70 °C

K3

≤ 30 ppm/°C

LONG LIFE

90’/30’ cycles

ambient temperature 70 °C

1000 h at

Pr

± 0.25 %

10 000 h at

Pr

± 0.5 %