NTC Thermistors
(Glass-Sealed Type)
Glass-sealed NTC Thermistors
Type:
ERTG
Glass-sealed NTC Thermistors, Type ERTG, are minia-
ture axial leaded type thermistors in hermetically
sealed glass tube packages, featuring high accuracy
and high reliability owing to their unique construction.
s
Features
s
Recommended Applications
Temperature detection for:
q
Cooking Appliances
q
Air conditioning equipment
q
Automobile
q
Wide Operating Range
Nickel plated lead type: Ð40 to +300 ¡C
Solder plated lead type: Ð40 to +125 ¡C
q
Miniature axial lead type: (f1.6×2.4 mm)
q
Quick response
q
Highly stable in long term operation
s
Explanation of Part Numbers
1
2
3
4
5
6
7
8
9
10
11
12
E
R
T
G
2
Option
Product Code
ERT
NTC Thermistors
2
Glass Dim.
f
1.6 mm
K
Lead Style
Axial Lead
Solder Plated
Lead Type
Nickel Plated
Lead Type
Center B Value (K)
G
H
I
3251Ð3500
3501Ð3750
3751Ð4000
Resistance
Tolerance
G
H
J
K
Resistance R
25
( )
The first two digits
are significant figures
of resistance and the
third one denotes
number of zeros
following them.
W
Shape
Glass-sealed
G
Type
N
±
±
±
±
2 %
3 %
5 %
10 %
Design, Specifications are subject to change without notice.
Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð ET32 Ð
NTC Thermistors
s
Ratings and Characteristics
Part No.
Zero-Power
Resistance
(a25 ¡C)
2.0 kΩ
5.0 kΩ
8.0 kΩ
10.0 kΩ
20.0 kΩ
33.0 kΩ
2.0 kΩ
5.0 kΩ
8.0 kΩ
10.0 kΩ
20.0 kΩ
33.0 kΩ
B Value
25¡C/50¡C
3450 K
3550 K
3550 K
3380 K
3950 K
3950 K
3450 K
3550 K
3550 K
3380 K
3950 K
3950 K
G
±2 %
Tolerance of ÒB valueÓ: ±3 %
B(25¡C/50¡C)=
kn
(R
25
/R
50
)
1/298.15Ð1/323.15
B(25¡C/85¡C)=
kn
(R
25
/R
85
)
1/298.15Ð1/358.15
25¡C/85¡C
(3485 K)
(3615 K)
(3615 K)
(3435 K)
(3980 K)
(3980 K)
(3485 K)
(3615 K)
(3615 K)
(3435 K)
(3980 K)
(3980 K)
H
±3 %
J
±5 %
K
±10 %
6s
Ð40 to +300 ¡C
Nickel Plated
Type
6s
Ð40 to +125 ¡C
Solder Plated
Type
Thermal Time
Constant
Operating
Temperature
Range
(Glass-Sealed Type)
Heat
Table
Dissipation
A
Constant
VVV
Curve No.
1
2
3
1.5 mW/¡C
4
5
6
1
2
1.5 mW/¡C
3
4
5
6
ERTG2KG
1
V
202
ERTG2KH
1
V
502
ERTG2KH
1
V
802
ERTG2KH
1
V
103
ERTG2KI
1
V
203
ERTG2KI
1
V
333
ERTG2NG
1
V
202
ERTG2NH
1
V
502
ERTG2NH
1
V
802
ERTG2NH
1
V
103
ERTG2NI
1
V
203
ERTG2NI
1
V
333
V
Resistance Tolerance Code:
R
25
=Resistance at 25.0±0.2 ¡C
R
50
=Resistance at 50.0±0.2 ¡C
R
85
=Resistance at 85.0±0.2 ¡C
Measured in the air
s
Resistance vs. Temperature (Table A)
1M
6
5
4
100k
3
2
Ω
)
Resistance (
1
10k
1k
100
2
3
1
T
(
×
10
Ð3
K
Ð1
)
4
400
300
200
150
100
50
25
0
Ð20
Ð40
Temperature (
˚C
)
Design, Specifications are subject to change without notice.
Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð ET33 Ð
NTC Thermistors
s
Dimensions in mm (not to scale)
f
1.6 glass
f
0.4 lead
(Glass-Sealed Type)
27 min.
2.4
27 min.
q
Taping Type
R
R
L
P
L
1
ÐL
2
Z
R
T
t
26.0
+0.5
Ð0
5.0±0.5
2.2 max.
1.0 max.
0.2 max.
6.0±1.0
3.2 min.
1.0 max.
t
S
T
L
1
L
L
2
T
S
Z
P
S
s
Application Notes
1. Operating Temperature Range
The NTC Thermistors shall not be operated beyond the
specified Operating Temperature Range.
the devices. In soldering the devices, the glass sealed
section shall not be touched by molten solder and/or
heated iron tip.
2. Protective Circuit
When the NTC Thermistors are applied to equipment
for temperature sensors, user is recommended to
ensure safety level of the equipment by adding a
protective circuit and/or retardant-design curcuits.
6. Bending of the Lead Wires
3. Plastic Molding and Coating
The NTC Thermistors (Glass-Sealed Type) are easy-
breakable against mechanical stresses. Bending of
the lead wires shall be done 2 mm and more apart
from galss edges of the devices after securing/
claming the lead wires.
If another plastic molding or coating is applied to the
NTC Thermistors by user's option, the influences on
reliability of the devices shall be investigated in user's
equipment.
7. Environmental Conditions
4. Abnormal Mechanical Stresses
The NTC Thermistors may be damaged or deteriorated
when dropped or exposed to a large mechanical
impact or shock. Excessive impact or shock shall
not be applied to the devices. Dropped devices shall
not be used in your equipment.
The NTC Thermistors shall not be operated and/or
stored under following environmental conditions;
a) To be exposed directly to water or salt water.
b) Under conditions of dew formation.
c) Under conditions of corrosive atomosphere such as
hydrogen sulfide, sulfurous acid, chlorine and
ammonia.
8. Long Term Storage
5. Soldering
Soldering of the terminations shall be done at a
position of 2.5 mm or more apart from glass edges of
The NTC Thermistors shall not be stored under severe
conditions of high temperatures and high humidities.
Store them indoors under 40 ¡C max. and 75 %RH max.
Use them within one year and check the solderability
before use.
Design, Specifications are subject to change without notice.
Ask factory for technical specifications before purchase and/or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
Ð ET34 Ð
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