Document Number: 52009

Revision 25-Jul-02

www.vishay.com

32

RCMA

Vishay Sfernice

For technical questions, contact sfer@vishay.com

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.

PRACTICAL OPERATING TOLERANCES

Temperature coefficient

between – 10°C and + 70°C

LONG LIFE

90’/30’ cycles

ambient temperature 70°C

K5

≤ ± 10ppm/°C K4 ≤ ± 15ppm/°C

1000 hours at Pr

10.000 hours

at Pr

± 0.05%

± 0.15%

So, in operation under the specified conditions (Pr at 70°C)

the total drift (load life + T.C.) of a RCMA K4 does not

exceed ± 0.25%.

SPECIAL APPLICATIONS

Temperature coefficient tracking to 5ppm/°C.

Tolerance matching to 0.05%.

Selection of positive or negative T.C. in temperature range

of – 20°C to + 125°C.

For these applications and other requirements consult

VISHAY SFERNICE.

AMBIENT TEMPERATURE IN DEGREES CELSIUS

100

50

0

0

30

50

70

100

125

150

POWER RATING CHART

TEMPERATURE RISE

RATED POWER IN WATT

40

30

20

10

0

0

0.5

1

1.50

2

RCMA

1

RCMA2

RCMA4

TESTS

NF C 83-230 - CECC 40 100

Load Life at max. Category Temperature

Short Time Overload

Damp Heat Humidity

(Steady State)

Rapid Temperature Change

Climatic Sequence

Terminal Strength

Vibration

Soldering (Thermal Shock)

Load Life

Shelf Life

1000 h at 125°C 50% of Pn

≤ ± 1%

Insulation resist. >1G

Ω

≤ ± (0.25% + 0.05Ω)

≤ ± (1% + 0.05Ω)

Insulation resist. >1G

Ω

≤ ± (0.25% + 0.05Ω)

≤ ± (0.25% + 0.05Ω)

≤ ± (0.25% + 0.05Ω)

≤ ± (0,25% + 0.05Ω)

≤ ± (1% + 0.05Ω)

Insulation resist. > 1G

Ω

–

≤ ± (1% + 0.05Ω)

Insulation resist. >1G

Ω

± 0.25% or 0.05

Ω

± 0.1% or 0.05

Ω

± 0.2% or 0.05

Ω

± 0.1% or 0.05

Ω

± 0.05% or 0.05

Ω

± 0.05% or 0.05

Ω

± 0.05% or 0.05

Ω

± 0.1% or 0.05

Ω

± 0.1% or 0.05

Ω

± 0.25% or 0.05

Ω

Insulation resist. 106M

Ω

2.5 Um/5 s

limited to 2 Un

56 days

with low load

– 55°C

+ 155°C

– 65°C

+ 155°C

Pull - Twist - 2 bends

10 to 500Hz

+ 260°C 10 s

cycle 90’/30’

1000 h at Pn at 70°C

1 year

ambient temperature

CONDITIONS STD 202

REQUIREMENTS

TYPICAL VALUES

AND DRIFTS

PERFORMANCE

Molded Metal Film Very High Stability and

Precision Resistors