CHIP TYPE THERMISTOR
SMD type chip
Chip thermistors are specially processed, highly
reliable thermistors.
They can be face-bonded to act as thermal
compensators for ICs and they are manufactured
in sizes down to 1 square mm, they can also be
used to detect temperature with relatively small
time constants.
Part number
103 KT 2125T 1P:Ϯ1%,2P:Ϯ2%,3P:Ϯ3%
Dimension(EIAJ) 2125
Chip thermistor
Rated zero-power resistance at 25ЊC 103:10k⍀
Precautions
Taping (2125, 1608 type)
4.0Ϯ0.1
1.5 ϩ0.1
Ϫ0
(1.0Ϯ0.1)
1.65Ϯ0.2
(1.85Ϯ0.1)
2.4Ϯ0.2
Glass coating
L
W
Electrode
(Sn plated)
T
L1
1.5max.
L1
EIAJ
1005
1608
2125
EIA
0402
0603
0805
L
1.00Ϯ0.15
1.60Ϯ0.15
2.00Ϯ0.20
2.0Ϯ0.05
4.0Ϯ0.1
Unit(mm)
( ):1608type
W
0.50Ϯ0.10
0.80Ϯ0.15
1.25Ϯ0.20
T
0.6max.
0.95max.
1.2max.
3.5Ϯ0.05
Dimensions
1.75Ϯ0.1
0.3max.
(0.25max.)
8.0Ϯ0.3
Do not expose the thermistors to high
soldering heat for more than specified time.
(260ЊC for not longer than 10s is
recommended)
Minimum quantity:4000pcs/reel
L1
0.15Ϯ0.30
0.20Ϯ0.50
0.20Ϯ0.50
(1005 type)
1.5 ϩ0.1
0
Unit(mm)
2.0Ϯ0.05
4.0Ϯ0.1
Soldering
Cooling
260ЊCϮ5ЊC
0.9max
0.66Ϯ0.03
2.0Ϯ0.10
190ЊCϮ15ЊC
0.6Ϯ0.10
120sϮ30s
1ϳ2 10s
ЊC/s max.
1.10Ϯ0.10
Temperature
Preheat(air)
8.3 max
Reflow soldering profile
1.75Ϯ0.1
3.5Ϯ0.05
0.75Ϯ0.02
Time
Unit(mm)
Minimum quantity:10000pcs/reel
Specifications
Part No.
R25*1
B value*2
103KT2125T
103KT1608T
503KT1608T
104KT1608T
103KT1005T
10k⍀
10k⍀
50k⍀
100k⍀
10k⍀
3435KϮ1%
3435KϮ1%
4055KϮ1%
4390KϮ1%
3435KϮ1%
Dissipation factor
(mW/ ЊC)
1.0
0.9
0.9
0.9
0.7
*1 R25 : Rated zero-power resistance value at 25ЊC.
*2 B value : determined by rated zero-power resistance at 25ЊC and 85ЊC.
*3 Time when thermistor temperature reaches 63.2% of the temperature difference. The value is measured in the air.
Other resistance is available, please ask.
14
Thermal time
constant(s)*3
7.5
5.0
5.0
5.0
2.2
Rated power
at 25 ЊC(mW)
5.0
4.5
4.5
4.5
3.5
Operating temp.
range( ЊC)
Ϫ40ϳ125
Ϫ40ϳ125
Ϫ40ϳ125
Ϫ40ϳ125
Ϫ40ϳ125