This is the PDF file of catalog No.R44E-5
R44E5.pdf 01.9.1
NTC Thermistors
NTC
THERMISTORS
Murata
Manufacturing Co., Ltd.
Cat.No.R44E-5
This is the PDF file of catalog No.R44E-5
R44E5.pdf 01.9.1
CONTENTS
Part Numbering
Basic Characteristics
1
2
3
4
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1
2
4
5
6
8
10
12
15
16
18
21
23
24
25
26
28
32
34
2
for Temperature Compensation 0201(0603) Size
for Temperature Compensation 0402(1005) Size
for Temperature Compensation 0603(1608) Size
for Temperature Compensation 0805(2012) Size
for Temperature Compensation Temperature Characteristics (Reference Value)
3
Chip Type
!Caution/Notice
Chip Type Notice (Soldering and Mounting)
Chip Type Package
5
for Temperature Sensor Resin Coated Radial Lead Type
for Temperature Sensor Temperaute Characteristics (Reference Value)
for Temperature Sensor Lead Type
!Caution/Notice
for Temperature Sensor Lead Type NTSA Series Package
4
5
6
for Inrush Current Suppression Lead Type
Current-R Ratio (RT/R25) / Current-Tempereture Characteristics (Typical)
for Inrush Current Suppression Lead Type
!Caution
/ Notice
for Inrush Current Suppression Lead Type Package
6
This is the PDF file of catalog No.R44E-5
R44E5.pdf 01.9.1
o
Part Numbering
the "Global Part Numbers" that have been adopted
and the
(
The structure ofquestions about details, inquire at your usual Muratasince June 2001distributor.meaning of each code are described herein.
)
If you have any
sales office or
NTC Thermistors for Temperature Compensation Chip Type
(Global Part Number)
qProduct
ID
Product ID
NC
wSeries
Code
P
eDimensions
(LgW )
Code
03
15
18
21
Dimensions (LgW )
0.60g0.30mm
1.00g0.50mm
1.60g0.80mm
2.00g1.25mm
EIA
0201
0402
0603
0805
iPackaging
Code
RA
RB
rTemperature
Characteristics
Code
WB
WD
WF
WM
XF
XQ
XH
XM
XV
XW
tResistance
Expressed by three figures. The unit is ohm (Ω). The first and
second figures are signficant digits, and the third figure expresses
the number of zeros which follow the two figures. If there is a
decimal point, it is expressed by the capital letter "R". In this
case, all figures are significant digits.
Ex.)
Code
102
103
104
Resistance
1kΩ
10kΩ
100kΩ
Temperature Characteristics
Nominal B-Constant 4050e4099K
Nominal B-Constant 4150e4199K
Nominal B-Constant 4250e4299K
Nominal B-Constant 4500e4549K
Nominal B-Constant 3250e3299K
Nominal B-Constant 3650e3699K
Nominal B-Constant 3350e3399K
Nominal B-Constant 3500e3549K
Nominal B-Constant 3900e3949K
Nominal B-Constant 3950e3999K
RC
RD
Packaging
Plastic Taping 8mm Pitch
Paper Taping 4mm Pitch
Paper Taping 2mm Pitch (10000 pcs.)
Paper Taping 2mm Pitch (15000 pcs.)
Series
Plated Termination Series
uIndividual
Specifications
Code
03
Please contact us for details.
NC
q
P
18
XH
r
103
t
J
03
RB
i
yResistance
Tolerance
Code
Resistance Tolerance
±1%
±5%
±10%
w e
y u
NTC Thermistors Chip Type
F
J
K
Individual Specifications
Structure, others
2
This is the PDF file of catalog No.R44E-5
R44E5.pdf 01.9.1
NTC Thermistors for Temperature Sensor Lead Type
(Global Part Number)
qProduct
ID
Product ID
NT
wSeries
Code
SA0
SD0
Series
for Temperature Sensors No Lead-coating Type
for Temperature Sensors Lead-coating Type
NTC Thermistors
NT
q
SA0
w
XH
e
103
r
F
E1 B0
u
rResistance
Expressed by three figures. The unit is ohm (Ω). The first and
second figures are signficant digits, and the third figure expresses
the number of zeros which follow the two figures. If there is a
decimal point, it is expressed by the capital letter "R". In this
case, all figures are significant digits.
Ex.)
Code
202
203
tResistance
Tolerance
Code
E
F
yIndividual
Specifications
Code
E1
uPackaging
Code
A0
B0
Packaging
Ammo Pack
Bulk
Individual Specifications
Lead Style, others
Resistance Tolerance
±3%
±1%
Resistance
2kΩ
20kΩ
t y
eTemperature
Characteristics
Code
WB
WC
WD
WF
XM
XH
XR
XV
Temperature Characteristics
Nominal B-Constant 4050e4099K
Nominal B-Constant 4100e4149K
Nominal B-Constant 4150e4199K
Nominal B-Constant 4250e4299K
Nominal B-Constant 3500e3549K
Nominal B-Constant 3350e3399K
Nominal B-Constant 3700e3749K
Nominal B-Constant 3900e3949K
NTC Thermistors for Inrush Current Suppression
(Global Part Number)
qProduct
ID
Product ID
NT
wSeries
Code
PD7
PD9
PDB
PDD
PDJ
PDN
Series
Nominal Body Diameter
7mm
9mm
11mm
13mm
18mm
22mm
NTC Thermistors
NT
q
PD7
w
160
e
L
D7
B0
y
eResistance
Expressed by three figures. The unit is ohm (Ω). The first and
second figures are signficant digits, and the third figure expresses
the number of zeros which follow the two figures. If there is a
decimal point, it is expressed by the capital letter "R". In this
case, all figures are significant digits.
Ex.)
Code
3R0
100
rResistance
Tolerance
Code
L
tIndividual
Specifications
Code
D7
yPackaging
Code
A0
B0
Packaging
Ammo Pack
Bulk
Individual Specifications
Lead Style, others
Resistance Tolerance
±15%
Resistance
3Ω
10Ω
r t
Inrush Current
Suppression
Lead Type
3
This is the PDF file of catalog No.R44E-5
R44E5.pdf 01.9.1
Basic Characteristics
!Basic
Characteristics
1. Zero-power Resistance of Thermistor : R
R=R
0
expB (1/T-1/T
0
)
..............(1)
R : Resistance in ambient temperature T (K)
(K : absolute temperature)
R
0
: Resistance in ambient temperature T
0
(K)
B : B-constant of Thermistor
[Resistance vs. Temperature]
10
2
Resistance VS. Temperature Characteristics [R/R25]
10
1
2. B-Constant
as (1) formula
B=Rn (R/R0) / (1/T-1/T
0
)
............(2)
1
3. Thermal Dissipation Constant
When spend electric power P (mW) in ambient
temperature T
1
, if Thermistor's temperature rises T
2
, there
is a formula as follows
P=C (T
2
-T
1
)
..................(3)
C : Thermal dissipation constant (mW/°C)
Thermal dissipation constant change by dimensions,
measure, measured condition etc.
10
−1
B=3450
B=3900
B=4100
10
−2
−20
0
20 40 60 80 100 120
Temperature [˚C]
4. Thermal Time Constant
Period in which Termistor's temperature will change
63.2% of its temperature difference from ambient
temperature T
0
(°C) to T
1
(°C).
[Thermal Time Constant]
T
1
X
Temperature
63.2%
T
0
Time
!Performance
Item
Resistance
Condition
It measures by zero-power in specified ambient temperature.
It calculates between two specified ambient temperature by next formula.
T and T0 is absolute temperature (K).
B-Constant
B=
Rn
(R/R
0
)
1/TY1/T
0
Thermal Dissipation
Constant
It shows necessary electric power that Thermistor's temperature rises 1˚C by self heating.
It calculates by next formula. (mW/˚C)
C=
P
TYT
0
Rated Electric Power
Permissive Operating Current
It shows necessary electric power that Thermistor's temperature rises 100˚C by self heating in ambient temperature 25˚C.
It is possible to keep Thermistor's temperature rising max. 1˚C
Please inquire about test condition and Ratings.
4
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