NTC Thermistors (Disc Type)
Disc Type NTC Thermistors
Type:
ERTD
Disc type negative temperaturecoefficient thermistors.
Resistance values from 8
W
to 150 kW and B Values
are from 3000 K to5000 K.
n
Features
l
Wide selection of temperature coefficients
l
Excellent electrical and thermal stability
n
Recommended Applications
l
Temperature detection
l
Temperature compensation for measuring
instruments
l
Temperature compensation for deflection coil in TV
n
Explanation of Part Numbers
E
R
T
D
Ω
±
±
±
n
Derating Curve for the NTC Thermistor
Rated Load (%)
For the NTC Thermistor operated in ambient
temperature above 25 ûC, power rating should be
derated in accordance with the right figure.
Ambient Temperature (˚C)
Rev.02/04
NTC Thermistors (Disc Type)
n
Ratings and Characteristics
Part No.
Zero-Power
Resistance
at 25 ¡C(W)
20
40
75
100
100
170
250
250
300
350
600
800
1000
1400
2000
3300
4600
8000
10000
15000
33000
50000
150000
8
13
16
20
30
40
75
80
130
500
4000
20000
80000
K
±10 %
B Value
]]
(K)
Maximum
Permissible
Power(W)
Heat
Dissipation
Constant
(mW/¡C)
Thermal Time Resistance
Constant
Ratio
(s)
R
25
/R
50
2.18
2.30
2.62
2.48
2.62
2.62
2.48
2.76
2.76
2.48
2.83
0.4
4.5
20
2.76
2.61
2.76
2.83
2.83
2.90
2.90
2.90
2.98
3.22
3.22
3.48
2.18
2.30
2.30
2.30
2.30
2.30
0.6
7.0
27
2.62
2.62
2.62
2.83
2.90
3.22
3.70
L
±15 %
Table
A/B
Curve No.
Ñ
Ñ
1
Ñ
2
3
Ñ
4
Ñ
5
6
7
Ñ
Ñ
8
9
Ñ
10
Ñ
11
12
13
14
15
16
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
Ñ
17
ERTD2FEL
]
200S
ERTD2FFL
]
400S
ERTD2FGL
]
750S
ERTD2FFL
]
101S
ERTD2FGL
]
101S
ERTD2FGL
]
171S
ERTD2FFL
]
251S
ERTD2FGL
]
251S
ERTD2FGL
]
301S
ERTD2FFL
]
351S
ERTD2FGL
]
601S
ERTD2FGL
]
801S
ERTD2FGL
]
102S
ERTD2FGL
]
142S
ERTD2FGL
]
202S
ERTD2FGL
]
332S
ERTD2FHL
]
462S
ERTD2FHL
]
802S
ERTD2FHL
]
103S
ERTD2FHL
]
153S
ERTD2FHL
]
333S
ERTD2FHL
]
503S
ERTD2FIL
]
154S
ERTD3FEL
]
8R0S
ERTD3FFL
]
130S
ERTD3FFL
]
160S
ERTD3FFL
]
200S
ERTD3FFL
]
300S
ERTD3FFL
]
400S
ERTD3FGL
]
750S
ERTD3FGL
]
800S
ERTD3FGL
]
131S
ERTD3FGL
]
501S
ERTD3FHL
]
402S
ERTD3FHL
]
203S
ERTD3FIL
]
803S
]
3000
3200
3700
3500
3700
3700
3500
3900
3900
3500
4000
3900
3700
3900
4000
4000
4100
4100
4100
4200
4500
4500
4800
3000
3200
3200
3200
3200
3200
3700
3700
3700
4000
4100
4500
5000
Resistance Tolerance Code
J
±5 %
l
Operating Temperature Range: Ð30 to +125 ¡C
Tolerance of ÒB valueÓ: ±10 %
kn
(R
25
/R
50
)
R
25
=Resistance at 25.0 ¡C
B=
R
50
=Resistance at 50.0 ¡C
1/298.15Ð1/323.15
]]
NTC Thermistors (Disc Type)
n
Dimensions in mm (not to scale)
Straight Lead Type
F Type
Crimped Lead Type
Z Type
F Type
fD
D2
D3
5.0±0.5
7.5±0.5
T
1.3±0.5
1.4±0.5
k
30.0 min.
30.0 min.
W
2.5±1.0
5.0±1.0
fd
0.4
0.5
Z Type
fD
D2
5.0±0.5
T
1.3±0.5
u
3.0 max.
(nom.2.5)
e
4.5±1.0
h
6.0 max.
(nom.5.0)
W
5.0±1.0
fd
0.5
n
Resistance vs. Temperature (Table A)
n
Voltage vs. Current (Table B)
Ω
Ω
Ω
Ω
Ω
×
Ω
NTC Thermistors (Disc Type)
n
Resistance Color Code
Code
Color
Black
Brown
Red
Orange
Yellow
Green
Blue
Purple
Gray
White
Gold
Silver
1(1st Digit)
0
1
2
3
4
5
6
7
8
9
Ñ
Ñ
2(2nd Digit)
0
1
2
3
4
5
6
7
8
9
Ñ
Ñ
3(Multiplier)
10
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
10
Ð1
10
Ð2
n
Taping Dimensions in mm (not to scale)
Taping Type
P
P
0
P
1
P
2
fd
F
Æh
W
W
0
W
1
W
2
H
H
0
k
fD
0
t
12.7±1.0
12.7±0.3
3.85±0.70
6.35±1.30
0.50±0.05
5.0±1.0
0±5.0
18.0
+1.0
Ð0.5
12.5 min.
9.00
+0.75
Ð0.50
3.0 max
21.0±2.0
16.0±0.5
2.0 max.
4.0±0.3
0.5±0.2
NTC Thermistors (Disc Type)
Disc Type NTC Thermistors
Handling Precautions
The Disc Type NTC Thermisters (hereafter referred to as ÒThe NTC ThermistorsÓ) may fail in burnout, flaming or
glowing in the worst case, when subjected to severe conditions of electrical, environmental and/or
mechanical stresses.
The following Ò Safety PrecautionsÓ and ÒApplication NotesÓ should be taken into consideration. For any
questions regarding the ÒHandling PrecautionsÓ, please contact our engineering section or factory.
Safety Precautions
1.
Precautions for Safety
1.1 Operating Power
The NTC Thermistors should not be operated beyond their specified Maximum Permissible Power in the Catalog or
the Individual Specifications, otherwise , burnout or damages due to the thermal run awa could result. (if operated in
ambient temperature above 25 ¡C, power rating should be derated in accordance with the derating curve.)
1.2 Operating Temperature Range
The NTC Thermistors should not be operated beyond their specified Operating Temperature Range of in
the Catalog or the Individual Specifications.
(Do not touch the heated part of the NTC Themistors by hand during operation)
1.3 Plastic Molding and Potting
In case of plastic molding or potting, the NTC Thermistors may be damaged or deteriorated by extreme
mechanical stresses such as expanding and shrinking forces caused by the heat treatment of the plastics
applied (depending on curing conditions and types of plastics)
1.4 Environmental Conditions
The NTC Thermistors should not be operated and/or stored under the following environmental conditions;
a) Direct exposure to water or drops of water.
b) Direct exposure to sunlight.
c) Under conditions of high humidity or water condensation.
d) Direct exposure to oil, gasoline or organic solvent and/or atomospheres of them.
e) Under conditions of deoxidized or corrosive atomospheres such as chlorine, hydrogen sulfide, sulfur oxide
or vinyl chloride.
f) Under severe conditions of extreme vibration or shock.
1.5 Mounting
Do not let other parts touch the Thermistors because other coating is not a generated insulator.
1.6 Fail-Safe Design for Equipment
In application of the Termistors, equipment should be protected against deterioration and failures of the Thermistors.
2. Application Notes
2.1 Soldering Flux
Rosin-based and non-activated type soldering flux is recommended.
2.2 Post Soldering Cleaning
In case of solvent cleaning, outer coating material of the NTC Thermistors may acquire the solvent, de-
pending on the cleaning condition and type of cleaning solvent.
2.3 Abnormal Mechanical Stresses
The NTC Thermistors may be damaged or deteriorated, when dropped or exposed to a large impact. Excessive
shock and impact should not be applied.
2.4 Soldering
(1) When soldering the thermistor, solder for as short time as possible to minimize the exposure time of
the element to the melting point of solder.
Take into account the solder-heat resistance of the product before use.
(2) In soldering the device, the body and outer coating section should not be touched by molten solder
and/or heated iron tip.
2.5 Long Term Storage
(1) NTC Thermistors should not be stored under severe conditions of high temperature and/or high humidity.
(2) NTC Thermistors should not be stored under conditions of corrosive atomospheres such as hydrogen
sulfide, sulfur oxide, chlorine, and ammonia etc.
(3) NTC Thermistors should not be exposed to direct sunlight.
(4) NTC Thermistors should not be stored under conditions of condensation.
(5) Store them indoors under 40 ¡C max. and 75 %RH max.
Use them within one year of manufacture and check the solderability before use.
单片机
京公网安备 11010802033920号
Copyright © 2005-2022 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
