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34

D...-CRCW

Vishay

Document Number 20008

Revision 28-Apr-03

D25

- CRCW1206

≤ 10K

≤ 1

M

≤ 10

M

140

120

100

80

60

40

20

0

ϑü = f [ϑs]

Parameter:

ϑu

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

ϑ

s in°C

0.01

0.1

1

10

1

0.1

0.01

Resistance change

∆ R/R %

∆ R/R (t) = f [∆R/R (t = 1000h)]

Parameter : time

0.5

0.4

0.3

0.2

0.1

0

ϑ

Parameter : size

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 =

100

000h

10

000h

5000h

2000h

1000h

∆ R/R [t = 1000 h] = f [ϑs]

Parameter: resistance value

0.25W

0.125W

0.0625W

120

100

80

60

40

20

1

2

3

5

7

10

2

3

5 7

100

2

3

5

7

60

80

100

120

140

surface temperature

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

Thick Film, Rectangular, Chip Resistors