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Document Number: 20035

112

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Revision: 04-Jul-07

D../CRCW.... e3

Vishay

Lead (Pb)-free Thick Film, Rectangular Chip Resistors

140

120

100

80

60

40

20

0

20

40

60

80

100

120 140 160 180

Load in W

0.01

0.1

1

20

40

60

80

100

120

140

160

180

Film temperature

ϑs in °C

0.01

0.1

1

10

1

0.1

0.01

Resistance change

ΔR/R %

ΔR/R (t) = f [ΔR/R (t = 1000 h)]

Parameter: time

0.5

0.4

0.3

0.2

0.1

0

140

120

100

80

60

40

20

0

Film temperature

ϑs in ° C

Stability nomogram typical values

(for handling see general explanations)

ϑ ü

=

20

°C

40

°C

60

°C

80

°C

100

°C

120

°C

140

°C

t =

10

0

00

0 h

10

00

0 h

50

00

h

20

00

h

10

00

h

ΔR/R [t = 1000 h] = f [ϑs]

Parameter: resistance value

ϑ

Parameter: size

1206

ϑü = f [ϑs]

Parameter:

ϑu

≤ 10K

≤ 1

M

≤ 10

M

0.25 W

0.125 W

0.0625 W

120

100

80

60

40

20

12

3

5

7

10

2

3

5 7

100

2

3

5

7

60

80

100

120

140

surface temperature

ϑ

number of mounted resistors [pcs]

Power rating as a function of packaging density (guideline)

120

°C

100

°C

80

°C

60

°C

40

°C

20

°C