D../CRCW.... e3
Vishay
Lead (Pb)-free Thick Film, Rectangular Chip Resistors
140
Temperature rise in
ϑ
ü
°C
140
120
100
80
60
40
20
0
20
ϑ
ü = f [
ϑ
s]
Parameter:
ϑ
u
=2
0
°
C
120
100
120
03
06
ϑ
ü
°C
40
60
°C
8
0
°C
C
0°
C
6
05
0
8
02
04
80
60
40
0°
10
ϑ
ü
= f [P]
]
Parameter: size
12
20
0
C
0°
14
0.5
Load in W
0.4
0.3
0.2
0.1
0
40
60
80
100
120
140
160
180
Film temperature
ϑ
s in
°
C
ΔR/R
(t) = f [ΔR/R (t = 1000 h)]
Parameter: time
0.01
Resistance change
[
ΔR/R]
in
%
after 1000 h
0.01
≤
1
0K
t=
0
10
0
00
h
0.1
0.1
≤
1
M
≤
1
0M
h
0
00 0 h
10 500 00 h
h
0
20
00
1
ΔR/R
[t = 1000 h] = f [ϑs]
Parameter: resistance value
1
0.1
0.01
Stability nomogram typical values
(for handling see
general
explanations)
120
10
1
Resistance change
ΔR/R
%
1
20
40
60
80
100
120 140 160 180
Film temperature
ϑs
in
°
C
100
ϑ
ü
=[
°C
]
ϑ
80
C
0°
=2
u
C
0°
=4
u
ϑ
0.25 W
60
ϑ
40
0.125 W
0.0625 W
20
C
0°
=6
u
C
0°
°C
°C
=
8
ϑ
u
ϑ
u
00
=1
0
12
u
=
ϑ
1
2 3
5 7 10
2 3
number of mounted resistors [pcs]
5 7
100
2
3
5
7
60
80
100
120
140
surface temperature
ϑ
s
[°C]
Power rating as a function of packaging density (guideline)
www.vishay.com
112
For technical questions in Europe, contact: ff3cresistors@vishay.com
For technical questions in Americas/Asia, contact: ff2bresistors@vishay.com
Document Number: 20035
Revision: 04-Jul-07
VAISH [ VAISHALI SEMICONDUCTOR ]
